4th Grade Engineering and Science Inquiry Resources : Page 6

Do different types of oil mix or stack? Find out in this science fair project idea!

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

Explore how sound waves are reflected and absorbed by producing echoes. Analyze which locations produce echoes.

This project explores whether nails, toothpicks, straws, or pen nibs are best for applying ink to paper.

What are buttress roots? In this fun science project, make a model of a rainforest tree and learn how they help trees survive in the tropical rainforest!

This science fair project idea investigates how color affects temperature.

Check out this cool science project idea to learn about rocks and explore the cycles of formation, breakdown, and reformation of rocks in the Earth's crust.

This science fair project idea investigates the ability of different whitening toothpastes to whiten teeth.

Construct and experiment with a periscope using reflected light rays to gather an image.

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

Free science fair project idea that examines the differences between cats and dogs. Analyze objective qualities rather than subjective ones.

In this activity, students will create a stop motion animation by creating a clay figure and taking a series of digital photographs.

Science fair project that determines whether lettuce that is harvested gradually yields more produce than lettuce that is harvested all at once.

This science fair project idea determines if crystals will absorb food dye and if colors will mix by the process of diffusion.

In this science fair project, you'll make a "ghost" appear in a test tube, and learn about what happens when hot water and cold water interact.

Make water and clay play a little more scientific with this hands-on experiment that teaches displacement and shows how an object's shape affects its buoyancy.

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 explores whether the process used to dry the beans we eat for food renders them unviable.

This science fair project investigates why the number of visible stars changes from place to place.

Ever wondered how a plant drinks water? This science project will teach you how and help you create a beautiful floral display!

Did you ever add salt to pasta? Did it help cook the pasta faster? If not, find out in this science fair project idea.

In this experiment, students find out what happens when a less-dense fluid interacts with a denser one, replicating the effect of cooler solid rock on magma.

Study the life cycle of the common blowfly as it relates to forensic investigation. Record the first time you see flies, maggots, and eggs.

Can you increase the light and plant growth in your garden using mirrors? In this experiment, measure light reflection and find out!

How well can people recall what they have observed. Test your knowledge in this fun experiment.

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.

Would your dog prefer homemade or store-bought food? Raw or cooked? Test your dog's preferred diet in this fun experiment.

This science fair project idea investigates how optical distances change the apparent size of an object as seen through a magnifying lens.

Could there be toxic chemicals lurking in the cupboards and closets of your home?

In this science fair project, students learn how pressure can make the minerals in a rock line up in the same direction and form bands and foliation.