4th Grade Life Science Projects

In this fun science project, learn about what happens to cut fruit and experiment with how to stop apples from turning brown.

In this cool science fair project idea, kids conduct the ruler drop test on volunteers to determine whether reaction time can be improved with practice.

This science fair project teaches about mold. Students will test different foods to see which grow mold the fastest.

What are the effects of fertilizer on plant growth? What's the best fertilizer type (solid, liquid or powder)? Kids find out in this science fair project idea.

This science fair project idea determines if the color of light affects the growth of plants.

Science fair project which determines if plants really do need water to grow, or whether they just need to be kept wet.

This science fair project has kids conduct a blindfolded taste test to determine how smell influences our ability to taste foods.

Are there really specific taste areas of the tongue for sweet, salty, bitter, sour, and umami? Find out for yourself in this cool science project.

Check out this fun and easy 4th grade science fair project idea that tests how gravity induces positive and negative geotropism (gravitropism) in bean plants.

This science experiment tests if dog saliva can really help heal wounds.

Discover whether the â5-second ruleâ is effective at determining whether food is still safe to eat after being dropped on the ground.

What chromosome combinations determine a fetus gender? Use probability to think about whether a sperm and ovum will create a male or female in this project.

How greasy are your potato chips? Students will use a reliable method to quantify greasiness and compare different brands in this great science fair project.

Will potatoes spud or sprout faster in dry, dark, or cold conditions? Find out in this science fair project idea!

Kids learn how to prevent erosion by growing grass. They'll test soil with grass against raw soil in this revealing science fair project idea for 4th grade.

This science fair project idea explores whether talking to a plant will help it grow.

Would it hurt to skip brushing your teeth just this once? Let's find out by seeing which foods produce the most mouth bacteria.

This science fair project idea determines which method of hand cleansing is the most effective.

This fun and easy middle school science fair project idea explores the topic of pollution and demonstrates if polluted soil affect the growth of green plants.

This science fair project idea explores the different parts of the human ear and models how the human ear reacts to sound waves.

Test whether plants can grow without sunlight and water.

In this pinto bean germination experiment, you'll learn about how fertilizer aids in growing pinto beans into seedlings.

Have your kid determine if a goldfish can be conditioned to expect food the same way Pavlov's dogs did with this fascinating science fair project.

Have you ever noticed the ridges on a dog's nose? In this project, we take several dogs' nose prints and discover just how unique they are!