Hands-on science experiments and projects make learning meaningful and fun for 5th graders. These activities help children explore biology, physics, chemistry, and other scientific fields. Teachers and parents can try these at a science fair or use them to liven up lesson plans. The projects vary in difficulty and materials required. Some are easy with low or no preparation, while others need specialized supplies.
These hands-on experiments help students explore what matter is made of and how it behaves. From density and states of matter to chemical reactions and polymers, these activities make big science concepts easier to see and understand. Adrienne Hathaway for We Are Teachers
Use Ping-Pong balls to create simple models of solids, liquids, and gases. Arrange the balls tightly together to represent a solid, loosely inside a container to represent a liquid, and farther apart to represent a gas. Invite students to compare how the particles are arranged and discuss how they move in each state of matter.
Mix root beer and ice cream to explore solids, liquids, and gases interacting in one fun treat. Students can observe the foam, melting ice cream, and fizzy bubbles to identify examples of each state of matter in action. Ask them to describe how the ingredients change as the float sits.
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Dry Ice and Water Experiments
Place dry ice in a container with warm water, then stretch a soapy film across the opening to trap the carbon dioxide vapor inside a giant bubble. Students can watch the bubble expand until it bursts. Use this adult-led demonstration to explore sublimation, gas expansion, and surface tension. Caution: Dry ice should never be handled with bare hands.
Add food coloring to hot and cold water, then carefully place one container on top of the other with a card between them. Remove the card and observe how the liquids move depending on which container is on top. Students can see how temperature affects density and movement in liquids. Naomi Meredith for We Are Teachers
Pour milk into a shallow dish and add drops of food coloring. Dip a cotton swab in dish soap and touch it to the milk. Students can watch the colors swirl as the soap interacts with the fat molecules in the milk, offering a colorful introduction to surface tension and molecular interactions. Myranda McDonald for We Are Teachers
Static Electricity and Polymers
Rub a balloon or comb against hair or wool fabric, then hold it near small pieces of paper. Students can observe the paper moving toward the charged object without being touched. Use the activity to introduce static electricity, electrical charges, and attraction.
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Combine glue, cornstarch, and a diluted borax solution to create a moldable mixture. Shape the material into balls and test how well they bounce. Students can compare different ingredient ratios to explore polymers, elasticity, and how chemical reactions can create new materials.
Chemical Reactions and Density
Place unopened cans of regular and diet soda into a container of water and observe whether they sink or float. Ask students to predict what will happen before testing. Discuss how the amount of dissolved sugar affects density even though the cans are the same size.
Create a simple low-voltage circuit and test whether different water samples allow electricity to flow. Students can compare distilled water, tap water, and salt water by observing whether the LED lights up. Use battery power only, never a wall outlet.
Pour vinegar into a bottle and use a funnel to add baking soda to a balloon. Stretch the balloon over the bottle opening, then lift it so the baking soda falls into the vinegar. Students can watch the balloon inflate as the reaction produces carbon dioxide gas.
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Water and Physical Changes
Place hydrated water beads in cups and add different amounts of salt. Students can observe how the beads shrink as water moves out of them. Measure the beads before and after the experiment to explore osmosis and the effects of solute concentration.
Add baking soda to a model volcano or container, then pour in vinegar mixed with dish soap and food coloring. Students can observe the foamy eruption caused by a reaction that releases carbon dioxide gas. Test different ingredient amounts to see how they affect the size of the eruption. Hilary Statum for We Are Teachers
Force and Architecture
Place eggshell halves with the curved sides facing upward, then carefully add weight on top. Students can record how much weight the shells hold before breaking. Discuss how the shell’s dome shape distributes force and why similar designs are used in architecture.
Put a plastic bag over a glass of water and poke holes in it with a sharpened pencil. The water stays inside the bag because the plastic stretches to hold it. This trick shows how polymers work and how a sealed container can keep liquid inside even when the walls have holes. Students might get a surprise when they try to fill the bag all the way to the top.
