How to Turn Leftover Food into a Science Experiment

Whoever said "Don't play with your food" never learned how to turn leftover food into a science experiment

Grab an apron and convert your kitchen into a chemistry lab with ingredients you can find around the house!

From DIY tie-dye to marshmallow molecules, join us as we reduce, reuse, and recycle leftovers and food scraps into some exciting science experiments! 


 

Science experiments that look good enough to eat!

Science and chill

This (literally) cool fan-favorite science experiment is not only delicious, but dives into the science behind this classic sweet treat. 

Chemistry rocks! 

Check out the chemistry behind candy with this crunchy and colorful creation.

DO play with your food!

Never trust a molecule, they make up everything

This make-a-molecule activity is a great way to introduce little learners to chemistry or and makes a delicious study tool for rising researchers!

Dig in!

If your little learners really DIG dinosaurs, step into the role of paleontologist with a chocolate chip cookie archaeology activity for kids!

Science is sugar, spice, and everything nice

If you need to give your sweet tooth a break, check out what to do with leftover candy! You'll love this sweet take on STEM!

Turn scrap food into science

You don't need a Ph.D. to make your own pH indicators 

Turn your leftover fruits and veggies into natural DIY pH indicators and use them to test the pH of things you find around your home!

Try this DIY tie-dye

Did you know that you could use avocado scraps to make fabric dye at home? Learn how to extract tannin from the pit and skin of avocadoes!

Rise and (coffee) grind!

Real fossils can take 1000s of years to form, but you can make your own in about an hour using coffee grounds

Sensory Soap Experiments • 5 Brilliant Ways to Learn About Bubbles

Learn about the science of suds with these sensory soap experiments!

Double, double, science, and bubbles!

Bubbles are everywhere! We see them in soap, soda, and even our own saliva (gross!)Have you ever wondered why and how scientists study bubbles? Try it out for yourself with these five sensory soap experiments that will teach you all about the science of suds and bubbles.

Water you waiting for? Let's get started! 


Bubble Snakes

Make bubble snakes with this sensory, early childhood approved activity! With just a few items, you can make long, endless bubbles. To make this more fun, add some washable paint to your bubble solution!

Lava Lamps

Lava lamps are making a comeback with this DIY project! With some simple items found around the house, your young scientist will learn all about density with these simple steps.

Un-Poppable Bubbles

If you’ve ever wondered why bubbles pop, you’re not alone. Other than being poked or landing on something sharp, bubbles pop when the water between the soap film surfaces evaporates.

Want to make your own un-poppable bubbles? All you need is water, dish soap, and glycerin. 

Bath Fizzers

It’s time to make bath fizzers for you and your friends! This chemistry project introduces chemical reactions.

Make your bath fizzer as unique as you by experimenting with different scents or colors. 

Iridescent Bookmarks

Iridescence is a rainbow-like coloration that changes colors when you look at it from different angles. It can be found naturally in animals like fish scales or a butterfly's wing.  It can also be seen in bubbles!

Using just drops of clear nail polish, you can achieve this effect at home and create a customized iridescent bookmark!


 

A Sweet Archaeology Activity for Kids

Dinosaur lovers will really dig this sweet archaeology activity for kids! 

When paleontologists dig up dinosaurs, they think about a few things. One of the things they think about is where the fossil was found, or its context.

Where in the dirt? Was it near the surface? Deep underground? Was it near footprints? Next to a fossilized tree? Where a fossil was found can tell us more about it.

If you dig dinosaurs, this archaeology activity will turn kinds into junior paleontologists!


Materials:

  • Paper
  • Pencil
  • Ruler
  • Tray
  • Toothpicks aka your chisel and hammer
materials for activity

Step 1:

Place your paper on the tray.  This will be your excavation area.

 On the blank side of the paper, use the ruler to mark out a 5cm x 5cm grid.  Each square in the grid should be 1 cm down and 1 cm across.

Label the boxes across the top A, B, C, D, & E, and the boxes down the side 1, 2, 3, 4, & 5. 

a 5 x 5 archaeology grid for activity

Step 2:

Place the cookie in the middle of your plate on top of the squares you drew.

Very carefully, chip the cookie dough away from one chocolate chip.  Watch your fingers!

archaeology activity for kids

Step 3:

Try to excavate as many chips as you can. Use the grid to remember where you found them, and make note of unique shapes or sizes.

recording your archaeology cookie

 

You have now excavated your chocolate chips and noted their position just like a paleontologist does with a dinosaur skeleton. Each numbered square helps them remember where they found a fossil.

an excavated cookie activity for kids

Expand on the activity!

Ice Cream Science Project: How to Make Ice Cream in 3 Simple Steps

I scream, you scream, we all scream "SCIENCE" with this ice cream science project!

Feel the chill this winter as you learn the science of cold by making homemade ice cream! This vanilla or chocolate ice cream science project doesn’t require any fancy equipment, just plastic food storage bags, elbow grease, and chemistry!

Recommend age: 5+; younger scientists may need help measuring ingredients and shaking the bag.

Mess Alert: This activity can be messy since the bags can leak! You may want to shake the bags outside or over a sink.

Materials you will need:

  • ½ cup of whole milk or half-and-half
  • 1 tablespoon of sugar
  • ¼ teaspoon of vanilla
  • 1 tablespoon of cocoa powder
  • 6 tablespoons of rock salt or ice cream salt
  • 1 pint-size plastic food storage bag (e.g., Ziploc)
  • 1 gallon-size plastic food storage bag
  • Ice cubes
  • Duct tape
Completed chocolate ice cream science project

Directions:

Step 1:

Fill the gallon-size plastic food storage bag halfway with ice, and add the rock salt to the ice. Seal the bag so it doesn’t spill while you prepare the ice cream ingredients.

Tip: You can add more than one bag of ice cream to the bag of ice and shake them at the same time. If you do make more than one bag, you can use a Sharpie to label the bags of ice cream to tell them apart.

add rock salt to ice cream science project

Step 2:

Add the milk and sugar to the pint-size plastic food storage bag. Optional: add cocoa powder to the pint-size bag to make chocolate ice cream. (Add the vanilla to the pint-size bag, even chocolate ice cream has a little vanilla in it!)

Squeeze the excess air out of the pint-size bag and seal it, and tape the seal shut with duct tape to keep it from spilling. Shake the pint-size bag for a few seconds to mix the ice cream ingredients.

Tip: ½ cup of milk will make about 1 scoop of ice cream, so double the recipe if you want more. But don't increase the proportions more than that – a large amount might be too big for kids to pick-up because the ice itself is heavy.

adding vanilla to ice cream science project

While you're making and shaking your ice cream talk about physical and chemical changes  and encourage your scientist to answer the following:

  • What does your ice cream look like?
  • Why do you think the ingredients in the pint-size bag turn to ice cream?
  • What do you think the shaking did?
  • Why do you think we added salt to the ice?
  •  What physical or chemical changes did you observe while making your ice cream?
  • What other examples of physical or chemical changes can you think of?
  • Dive deeper into a science topic with the “Learn More” section.

Step 3:

Open the gallon-size bag and put the pint-size bag inside it, and carefully seal the gallon-size bag again. Make sure it is completely shut!

Shake until the mixture in the pint-size bag is ice cream, which takes about 5 minutes.

Wipe off or rinse the top of the pint-size bag with cold water to remove any salt, then open the bag carefully, add any toppings you would like, and enjoy your ice cream!

seal liquid ingredients before shaking

Expand on the activity! 

The Science: Physical and Chemical Changes

We talk about two types of changes in chemistry: physical changes and chemical changes. We also talk a lot about matter, which is is anything that takes up space.

In a physical change, the form of matter is changed, while its chemical identity remains the same.

  • Think about cutting a piece of paper into bits. It’s still paper, just in smaller pieces. Physical changes are also reversible. You could tape the paper back together! Other examples of physical changes include boiling, melting, freezing, dissolving, and mixing.

In a chemical change, the chemical reaction occurs. The chemical reaction changes the chemical identity of the matter, and new products are formed that you can’t easily reverse.

  • Think of a campfire. The fire takes a log and creates ash and smoke, two chemically-distinct products.

There are 5 signs that a chemical reaction has occurred. They’re easy to remember… just think about F.A.R.T.S.

Fizzes: Did the reaction produce bubbles or gas?

Aroma: Did the reaction produce a smell?

Re-color: Did the reaction produce a new color?

Temperature: Did the reaction produce a temperature change or release light?

New Substance: Did the reaction produce a new substance?

When making ice cream, you’re using physical changes. You mix and dissolve the sugar into the milk, but this doesn’t change the chemical structure of the milk and you could remove the sugar is you tried.

When you shake your bag, you’re freezing the milk, which means the water in it is turning from a liquid (water) into a solid (ice). This is also a physical change! We still see lots of physical and chemical changes in the kitchen. Which ones can you think of?

Learn More: Chemistry

Why do we shake our ice cream science project instead of just popping the ice cream in the freezer?

Ice cream is an emulsion. In an emulsion, small droplets of one liquid are dispersed (or spread out) throughout another. When you shake the ice cream, you disperse the ice crystals, fat molecules, and air in the other ingredients.

The more you shake, the smaller the ice crystals get and the more air you add. This makes the ice cream creamier! We add salt to the ice so we can shake the ice cream long enough to emulsify it.

Every substance has a melting point, which is the temperature it melts or freezes at. For freshwater, the melting temperature is 32ºF/0ºC. Adding rock salt lowers the melting point of water. A 10% salt solution freezes at about 20ºF/-6ºC.

With a lower melting point, we can shake the ice cream longer to better diffuse the different parts. If it froze faster, this would be much harder to do.

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How to Create Iridescent Art: A Colorful STEAM Bookmark Activity

Scientists use nanotechnology to create this effect, but you just need clear nail polish to learn how to create iridescent art! 

Iridescence is the phenomenon of certain surfaces that appear to gradually change color as the angle of view or the angle of illumination changes. It can be found naturally in animals like fish for camouflage in the water and for attracting mates, or in the wings of butterflies and bird feathers. It is also seen in bubbles and you won't believe how simple it is to find out how to create iridescent art yourself!

Materials you will need:

  • Black paper
  • Clear nail polish
  • Permanent marker(s) that can write on black paper
  • Shallow container (like Tupperware or a frozen dinner tray)
  • Scissors
  • Tweezers (Optional)
materials for how to create iridescent bookmarks

Directions:

Step 1:

Cut out whatever size and shape bookmark you want to make. Smaller is easier to work with. Make sure it fits in your shallow container!

cut out shape of iridescent artwork

Step 2:

Write something or draw a picture on the paper with your markers.

draw art that will be under iridescent

Step 3:

Add enough water to the container so that it is about a half-inch deep.

pouring water over iridescent art

Step 4:

Hold one end of the black paper and slide it into the container until the paper is fully underwater.

slip paper under water

Step 5:

Add a single drop of nail polish onto the surface of the water above the paper. Make sure to just use one drop! Too much will ruin the effect!

*Tips:
The nail polish will dry quickly on top of the water. If it does, it will create a film that won’t stick to the paper. If the nail polish does create a dry film on top, simply scoop it off and try again more quickly!
It can take patience and practice to get this activity right!

add nail polish to water to create iridescent effect on your art

Step 6:

Now lift the paper out of the water, carefully dragging the face of the bookmark along the nail polish.

remove iridescent art from water

Step 7:

Leave your bookmark out to dry for about 10 minutes. Then check it out in different lights from different angles!

And that's it! You've mastered how to create iridescent art! Share your creations with us on social media by using #OrlandoScienceCenter or uploading it to our Science Showcase

finished Iridescent Bookmark art

Expand on the Activity!

Learn the science:

The nail polish spreads out into a super-thin film across the water, and then you transfer that film to the bookmark.

The film is only a few hundred nanometers thick, about as thick (or thin!) as a soap bubble. However, small differences in the thickness of the film change the color it reflects, so it creates the iridescent effect!

Can you think of any examples of iridescence in nature? Many bird feathers, butterfly wings, shells, and beetle shells have nano-sized, semi-transparent layers that create an iridescent effect when they reflect light. Scientists are also using nanotechnology to create iridescence for various materials and devices!

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Simple Sensory STEAM Activities to Engineer for Halloween

From creepy chemistry to haunted machines, add some spook to your science with these simple sensory STEAM activites

It’s Spooky Season! Looking for something ghoul to do with your young scientists? Create concoctions that are creepy, slimy, and scary! Take these simple sensory STEAM activities to the next level with a Halloween touch by adding scents, food coloring, and decorations. 

Scary Simple Slime

Check out our simple slime recipe and see what creative ways you can adapt it to become a spooky sensory activity!

Pumpkin spice-it-up with orange food coloring and pumpkin extract for ultimate Halloween slime! Not a pumpkin person? 

If you've got a black light, you can get bright blue slime that glows under UV light by substituting tonic water for water in any recipe. The tonic water contains quinine, which emits bright blue fluorescence under black light.

Another option is to add fluorescent highlighter ink to the slime recipe. You can get the ink by soaking a highlighter in water.

Turn oobleck into Oogie Boogie

Create dancing ghosts with Oobleck! All you need is to put a speaker or subwoofer close to the Oobleck and play your favorite spooky tunes. 

What is Oobleck? It’s a non-Newtonian fluid, meaning it can act like a solid or a liquid depending on what you do to it. If you try to pick it up, run through your hands like water. Try making a fist tap the mixture in the bowl; You’ll feel it become hard as a rock! You can use this to learn how molecules called polymers work. Click thebutton below to learn how to make this easy mixture!

Haunted Machines 

Automata’s are simple machines, like levers, pulleys, or wheels, that change the direction or magnitude of a force. 

In this project, you’ll be able to create your own simple machine, using small machines! Transform this cardboard structure with chilling decorations. From a haunted house to dancing skeletons, there’s so much you can do! 

Mixing Halloween and these simple sensory STEAM activities will get you into the spooky spirit and teach you a thing or two about how cool science is. These projects are for all levels of scientists and can be repeated for extra fun! 

Simple sensory STEAM activities

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How to Make Bath Fizzers • Explore Science While you Scrub-a-Dub-Dub

Add some science to your self-care by learning how to make bath fizzers! 

We’re bubbling over with excitement to teach you how to make bath fizzers! With some materials you can buy at the grocery store and a few steps, you can make your own bath fizzers at home.

This recipe is customizable, so you can add whatever color or scent you like, as well as additional treats such as dried flower petals or biodegradable glitter to your DIY bath fizzers. 

Materials you will need:

  • ½ cup baking soda
  • ½ cup cornstarch
  • ¼ cup citric acid
    • Citric acid can be purchased in the canning department of Walmart, some craft stores, and online through retailers like Amazon.
  • ¼ cup Epsom salt
  • 1 teaspoon water
  • 1 ¼ teaspoon coconut oil
  • 5-10 drops of scented oil if you would like your bath fizzer to have a scent
  • 1-2 drops of food coloring if you would like your bath fizzer to have a color
  • A large bowl
  • A small bowl
  • Whisk
  • A mold
    • You can use bath fizzer molds, muffin tins, or even plastic cups to shape your bath fizzer.
Materials for hot to make bath fizzers

 Ready to make your own? Watch along or follow the written steps below!

Watch this clip of WESH 2 News’ Adrian Whitsett creating his own moon sand at the Orlando Science Center. After making the moon sand, Whitsett participated in an activity to show how craters are made. With small rocks he was able to make large indents to recreate an asteroid knocking into the moon!

Are you ready to explore the moon, astronaut?

Directions:

Step 1:

Add the baking soda, citric acid, cornstarch, and Epsom salt to the large bowl. Whisk to combine the ingredients and remove clumps. Set the large bowl aside.

how to make bath fizzers

Step 2:

Melt coconut oil and add water, scented oil, and food coloring to the small bowl. Mix them together.

*Coconut oil melts with very little heat, so microwaving for a few seconds or heating the measured amount on a stove over low heat will melt it quickly.

customize your bath fizzers

Step 3:

Now, add the wet ingredients to the dry ingredients a little bit at a time, whisking continually to combine. If the mixture fizzes excessively, you are adding the liquid too fast. You should end up with a slightly damp mixture that has started to clump together and resembles wet sand.

combine all the ingredients in your bath fizzers

Step 4:

Pack the mixture into your mold. If you are using a spherical mold, press the two halves together. Carefully remove the mold so it has room to expand. Let the fizzer dry on a foil-lined baking sheet. Fizzers are usually dry after 8 hours.

put bath fizzers in a mold

The Science: Acid-Base Reactions

Now that you've learned how to make bath fizzers, check out the science behind it!

If you’ve ever made a baking soda and vinegar volcano, you’ve seen a type of chemical reaction called an acid-base reaction. As vinegar (the acid) and baking soda (the base) mix together and react, they fizz and make an eruption of bubbles. This is exactly what’s happening in your bath fizzers, but with slightly different ingredients.

In bath fizzers baking soda is still the base, but citric acid is the acid instead of vinegar. Since both citric acid and baking soda are dry, they have to be dissolved in water to react. Once they’re dropped in the water together, they react and fizz, creating the bubbles you see in your bath fizzer. The bubbles carry any scent in the bath fizzer to the surface of the water, making the bath smell nice.

Cornstarch is the other main ingredient in all bath fizzers, but it isn’t an acid or base. It’s used for several different reasons. It helps keep the baking soda and citric acid from reacting when adding the liquid ingredients, it binds all of the ingredients together, it helps to thicken and harden the bath fizzer, and acts as a non-reactive dry “filler” that slows down the reaction and makes the fizzing last longer.

Expand on the Activity! 

Learn More Chemistry

  • pH is a measurement of how acidic or basic something is. It is measured on a scale of 0-14.
  • A substance with a pH of 7 (like distilled water) is neutral. A substance with a pH of less than 7 is an acid. The closer the number gets to zero, the stronger the acid is. A substance with a pH of more than 7 is a base. The closer the number is to 14, the stronger the base is.
  • There are several different definitions of acids and bases in chemistry.
  • A simple chemical definition of an acid is a substance that releases hydrogen ions (H+) when dissolved in water. A simple chemical definition of a base is a substance that makes hydroxide ions (OH-) when dissolved in water or a substance that takes hydrogen ions from an acid.
  • Ions are positively (+) or negatively (-) charged particles of an element.

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Educational Messy Science Experiments from the OSC Vault!

We've ranked our favorite educational messy science experiments by messiness!

Every year, Orlando Science Center staff celebrates "Mess Month" which features some of gooiest, slimiest, messiest activities on a giant scale. Think foam-splosion, pendulum painting, pools of slime... you get the picture. We love our mess-tivities so much that we wanted to make sure you could enjoy educational messy science experiments all year long, so we adapted some of our favorites projects so you could try them at home!

 
From the ultimate slime time to some good clean fun will minimal clean-up,find them all in one place below! Be sure to use the Mess-O-Meter rating to find a mess-tivity fit for you! If you take any photos, don't forget to share them with us on social media by tagging Orlando Science Center and using #OSCatHome or you can submit them directly through our Science Showcase.

1. Ooey-GooeyOobleck

Mess-O-Meter Level: Very Messy

Make a big mess with just two ingredients! Learn about the states of matter and viscosity, practice lab skills like measuring and mixing with  this educational messy science experiment that's so fun, you won't even realize you're learning!

2. Cool and Colorful Ice Chalk 

Mess-O-Meter Level: Moderately Messy

The mess never bothered us anyway! Step up your driveway art with the coolest sidewalk chalk  around! Just be sure to wash away your artwork when you're finished to avoid stains. 

3. Forensic Science Spatter Painting

Mess-O-Meter Level: Moderately Messy

I spy with my little eye some messy fun! This educational messy science experiment will leave you with some new vocabulary words and a work of art!

4. Colorful Coffee Filter Experiment

Mess-O-Meter Level: Minimal Mess

Watch water defy gravity before your very eyes! This colorful experiment will help teach little learners about capillary action with a beautiful visual aid! And the best part is, it's all contained in a cup so cleanup is a breeze. 

5. Demonstrating Laminar Flow

Mess-O-Meter Level: Barely Messy

Looking for some good clean fun?  This experiment is maximum fun with minimal cleanup! Just make sure you're doing your demonstration outdoors. Let's learn how you can freeze time with water and a balloon!

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DIY pH Indicators: Turn Your Kitchen Into a Chemistry Lab!

Turn your kitchen into a chemistry lab by making your own DIY pH Indicators!

pH is a measurement of how acidic or basic something is on a scale of 0-14. 

 

Testing how acidic or basic something is with a color-changing indicator is a staple of many chemistry experiments. Now you can try it too! Turn your kitchen into a chemistry lab with DIY pH indicators!

 

A substance with a pH of 7 (like distilled water) is neutral. A substance with a pH of less than 7 is an acid. The closer the number gets to zero, the stronger the acid is. A substance with a pH of more than 7 is a base. The closer the number is to 14, the stronger the base is.

 

Try making one of these two natural DIY pH indicators and use it to test the pH of things you find around your home!

 

Recommend Age: 8+ with adult help for chopping and boiling.

Materials you will need for a red cabbage pH indicator:

  • Red cabbage
  • Knife and cutting board
  • Warm water
  • Blender
  • Strainer or funnel with coffee filter
  • Container to collect indicator


WARNING: Cabbage and blueberry juices can stain clothes! Mess-friendly play clothes or coverings such as aprons are recommended for this activity.

You can can make a variety ph indicators with Orlando Science Center

Directions for making red cabbage pH indicator:

STEP 1
  • Peel 3 or 4 big leaves off a head of red cabbage and chop the leaves into small pieces.
  • Fill a blender halfway with hot water.
  • Add the chopped cabbage leaves to the blender.
  • Blend the leaves and water on high until the liquid turns purple and all the leaves are blended.

    *Alternatively, you can boil the chopped leaves in just enough water to cover them for a few minutes, then let steep for 30-60 minutes.

Red cabbage for DIY pH indicators
STEP 2 
  • Place a strainer or funnel lined with a coffee filter over a container to collect the indictor, such as bowl, pot, or bottle.
  • Pour the mixture through the strainer to remove the cabbage pulp.
  • Push down on the pulp in the strainer with a spoon or spatula to squeeze out more liquid.
strain blended cabbage for purple diy ph indicator
STEP 3
  • The purple liquid in your container is your indicator solution. The exact color will vary depending on the pH of the water you used.
  • Experiment with the indicator using the ideas below!
  • Red cabbage indicator can be saved in a sealed container in the refrigerator for up to 1 week.
Result of blending red cabbage to create diy ph indicator

Materials you will need for a blueberry pH indicator:

  • 200g blueberries
  • Masher, spoon, or spatula to mash blueberries
  • Water
  • Pot
  • Strainer or funnel with coffee filter
  • Container to collect indicator

Directions for making blueberry pH indicator:

STEP 1
  • Mash the blueberries in a bowl or pot to release the blueberry juice.
  • Add mashed blueberries, juice, and a half cup of water to a pot.
  • Boil the blueberries for 5-10 minutes. The blueberry juice will turn red-purple.
Mash and boil blueberries to make a blue DIY ph indicator
STEP 2
  • Place a strainer or funnel lined with a coffee filter over a container to collect the indictor.
  • Pour the mixture through the strainer to remove the blueberry skins.
  • Push down on the skins in the strainer with a spoon or spatula to squeeze out more liquid.
  • The purple liquid in your container is your indicator solution. The exact color will vary depending on the pH of the water you used.
result of using blueberries to make another diy ph indicator

What to do with your DIY pH indicators 

Now that you have your pH indicators, it's time to get to testing! Use household liquids such as salt or distilled water, different fruit juices, milk, liquid detergent or soap, and more!

  • Add each of the substances you would like to test to the cups. (Only add one substance to each cup.) 
  • Add a spoonful of indicator to the first cup, and stir the indicator into the substance.
  • Observe the color changes. What do you see? Encourage your scientist to write down what color each substance turns. You can use crayons or markers to help keep track of color changes.
You can use different household liquids to test you DIY indicators

Expand on the Activity:

  • What color changes did you see? Did you notice any patterns?
  • If you use vinegar or lemon juice, what do you think will happen to the color of the DIY pH indicator if you add baking soda or an antacid tablet

  • For another hands-on chemistry experiment, try making your own STEM slime activity

The Science: pH and pH indicators

  • pH is a measurement of how acidic or basic something is. It is measured on a scale of 0-14.
  • A substance with a pH of 7 (like distilled water) is neutral. A substance with a pH of less than 7 is an acid. The closer the number gets to zero, the stronger the acid is. A substance with a pH of more than 7 is a base. The closer the number is to 14, the stronger the base is.
  • Strong acids and bases can be very dangerous, while weaker acids and bases (those with a pH close to 7) are safer to use.
  • We find acids in many of the foods we eat, as well as in our stomachs. Acids found in foods give them a sour taste.
  • Bases are commonly found in cleaning products and antacid medications. Bases feel slippery and are rare in food because they taste bitter. For reference, think about the taste of soap!
  • pH indicators are compounds that change color in the presence of an acid or a base.
  • Different pH indicators have different ranges. Some may only be able to show whether something is acidic or basic, while others may have a wide range of colors that can show different strengths of acids and bases. Some may be better for showing the pH of acids, while others may be better at showing the pH of bases. In a lab, the best indicator to use depends on the pH range you want to see.

Learn More: Chemistry

  • There are several different definitions of acids and bases in chemistry.
  • A simple chemical definition of an acid is a substance that releases hydrogen ions (H+) when dissolved in water. A simple chemical definition of a base is a substance that makes hydroxide ions (OH-) when dissolved in water or a substance that takes hydrogen ions from an acid.
  • Ions are positively (+) or negatively (-) charged particles of an element.
  • Many red, purple, and blue plants contain chemicals called anthocyanins, which are weak acids that dissolve in water and change color in response to changes in pH. Because of this, plants with anthocyanins like red cabbage and blueberries can easily be made into pH indicators.

Did you make and test your own indicator? We’d love to see how it turned out! Snap a photo of you making or experimenting with your indicator and submit it to our Science Showcase here or use #OSCatHome on social media!

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In these ever-changing times, it is our pleasure to adapt quality Orlando Science Center experiences to engage with everyone while they are safe at home. Please consider supporting our operating fund to ensure we can continue developing resources today and well into the future. Thank you for your generosity and support!

Salt Watercolor Painting Project • Paint Outside the Box

Brush up on your art skills with this salt & watercolor painting project

Think (or paint) outside the box wiht this unique painting technique! One-part experiment, one-part art experience, this salt & watercolor painting project will give you a wall-worthy finished project, while you learn some STEM skills along the way. 

Materials you will need:

  • Paper (Watercolor paper works best, but cardstock or sketchbook paper can also work)
  • Paintbrush
  • Watercolor paints
  • Salt
  • Water to rinse your painbrush
Materials needed to complete Orlando Science Center's salt and watercolor painting project

Directions:

Step 1

Set up your workspace and start painting! Keep in mind, your painting will change when you add the salt, so don’t worry too much about the details!

Begin your saltwater painting project by beginning to paint

Step 2

While your painting is still wet to the touch, sprinkle it with salt. Watch closely as the salt absorbs the water on your paper, and some of the color along with it! 

Observes salt on your watercolor painting project

Step 3 

When you’re finished, let your salt and watercolor painting project is completely dry, and gently rub the salt off the paper.

The result of salt and watercolor painting project

Expand on the Activity:

  • Try different kinds of salt! Table salt, sea salt, and rock salt are all great to try. How does the size of the salt grain impact what you see happen on your painting?

  • The amount of water on your paper will have a big impact on how it looks when you add the salt. Experiment with adding the salt at different points as your painting dries to see which effect is your favorite.

  • For another colorful activity with water, try this colorful coffee filter experiment!

 

Be sure to share your salt watercolor painting project with us by submitting a photo or video to our Science Showcase here or tag Orlando Science Center and use #OSCatHome on social media! You might be featured on our channels. 

OSC At Home Emails

Get a round up of our latest activities and ideas delivered straight to your inbox so you don't miss a thing!

Find out when we release new resources by following us on social media!

 

Follow us on social media for even more science fun including fun facts, games, behind-the-scenes photos, and more!

 

Facebook Logo Instagram Logo YouTube Logo Twitter Logo

Support OSC At Home

In these ever-changing times, it is our pleasure to adapt quality Orlando Science Center experiences to engage with everyone while they are safe at home. Please consider supporting our operating fund to ensure we can continue developing resources today and well into the future. Thank you for your generosity and support!