Search 4th Grade Science Projects : Page 3

What causes the seasons to change? Kids find out by modeling the earth's tilt using a globe, flashlight and graph paper in this cool science fair project idea.

Learn how to make a ping pong ball anemometerâa device used to measure wind speedâin this free science fair project idea.

In this science fair project, learn how a mineral streak is made and how it can help identify an unknown mineral.

Discover that the absorbency of fabrics depend largely on the shape and structure of the individual fibers that make up the fabric.

This science fair project idea highlights decomposition rates by comparing how long it takes an item to decompose in a compost pile vs. a landfill.

This science project uses Mohsâ Hardness Test to show kids how to compare the hardness of different types of minerals.

How does distance affect the spreading of light? Kids see diffraction and the inverse square law of light in action with this great science fair project idea.

This science project teaches students to classify different shapes of leaves.

This science fair project idea identifies trees using a dichotomous key.

How do organic materials become soil? This science experiment measures what materials biodegrade.

This science fair project on testing water hardness is a great introduction to practical chemistry. Test and learn the difference between hard and soft water.

Science fair project that examines what causes thunder and why a thunderclap sounds so loud. How is lightening related to the creation of sound waves?

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

In this science fair projects, students will grow out the bacteria that collect on air conditioner filters.

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

This science fair project idea explores plant growth from a bulb, root, and a stem and investigates asexual plant reproduction.

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

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 will help students learn about non-vascular plants, such as mosses.

This science fair project teaches students the differences between fruits and vegetables.

Discover whether a metal will expand under hot water.

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

Science fair project which compares the rate of temperature change and the maximum temperature as a result of the angle of light radiation.

In this science fair project, apply the principles of leverage and force by building six simple machines designed to set weights in motion.