4th Grade Life Science Projects

Do you have your isopods straight? Learn about sow bug and pill bug behavior by building a terrarium to study them in!

Observe corn seed germination to learn about dicots and monocots and how plants grow from seeds to seedlings to full-grown plants!

Learn about the fruit fly life cycle in this experiment. Capture fruit flies to examine various stages of insect metamorphosis.

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.

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.

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.

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.

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

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.

Have you ever seen fruit decay? Find out if a fruit will rot faster if you open it versus leaving it untouched!

Science fair project that examines how to grow bacteria in a controlled setting, using simple materials from around the home.

Test whether plants can grow without sunlight and water.

In this science fair project you will make a model of a cell membrane using very simple material.

Observe how your brain works while it is focused on one thing, and how it works while you are distracted by another thing.

Find out whether putting something on top of a plant will inhibit its growth.

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

Find out whether packaged seeds actually do expire in this new science fair project idea.

Watch pre-packaged seeds and seeds taken from inside fruits and vegetables grow. Which ones will grow faster? Read more in this science fair project idea.

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

Science fair project in which you will learn more about the natural world by preserving and identifying different animal tracks.

What do ants eat? Kids find out by observing a colony of ants in this cool zoology science fair project for 4th grade.

Science fair project that determines whether tapping a pomegranate with a spoon helps it release its seeds.

Science fair project that determines whether cooling eggs helps them be peeled more easily. Compare the time it took to peel each egg.

Science fair project that determines whether landscaping fabric impacts the ability of plants to receive water.