4th Grade Engineering and Science Inquiry Activities : Page 5

Learn how to demagnetize a magnet and how physics can explain this phenomenon with this enlightening science fair project.

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

This science fair project idea examines whether adding gelatin causes a solid to have a higher melting point and/or melt slower.

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

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

This science fair project idea researches the different layers of the atmosphere and creates a visual representation of the atmospheric layers.

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

This science fair project idea provides evidence that air is everywhere and takes up space.

Kids will learn about the interaction of lactose and lactase in milk and discover why we describe enzymes as catalysts in this fun science fair project.

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

Science fair project idea examines validity of mood ring predictions. Analyze accuracy of results, consider the impact of temperature

Science fair project that examines condensation and the conditions needed in order for dew to form.

This science fair project idea produces sounds by creating vibrations using different objects.

This science fair project idea investigates the difference in reaction times between boys and girls.

The goal of this science fair project is to analyze differences between the taste and texture of frozen and fresh food.

This science fair project idea examines whether plants are still able to grow normally if they are turned upside-down.

This science experiment tests whether warm or cold water works best in making cut flowers last longer.

This science fair project idea examines whether boys and girls differ in reflexes.

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

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

This science fair project creates a visual model of whatâs happening to sound waves as a car approaches and then leaves.

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

In this science and engineering activity, children will explore types of tunnels and their purposes and then design and build a tunnel of their own.

This project determines what category of person is most likely to be ticklish.

The purpose of this science fair project is to study the properties of sugar and examine individual preferences for sugar and other sweeteners.

Want to see a great example of Newton's first law? Kids will learn about basic physics with this fun, ballistic experiment.

Determine whether butterflies like to drink sugar water, salt water, or plain water.

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

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

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