What cause the phases of the moon? Make a model to see how the positions of the Sun, Moon, and Earth cause the crescent, gibbous, quarter, full, and new moon.

Help your second grader observe the phases of the moon, and then let the fun loose: he'll get to chart his observations with marshmallows!

In this science fair project, students evaluate if the phases of the moon affect the way people feel.

The objective of this free science fair project is to examine the way in which the phases of the moon affect circadian patterns in mammals.

How do the phases of the Moon and gravity cause spring tides and neap tides? Does the Sun play a role in the tides? Figure it out in this fun science project!

Science fair project that demonstrates the different phases of the moon by physically representing them with construction paper and a shoebox

Examine the influence of the phase of the moon on moisture capillarity in garden soil. Measure and record the depth at which water is first detected.

Explore the craters, maria, and highlands on the surface of the Moon! In this fun science project you'll create a 3-D model of the moon using paper mache.

The moon doesn't produce its own light, so why can we see it shining in the sky? Learn about reflection and planetshine in this fun and easy science project!

The objective of this project is to evaluate whether a top will spin at different rates during different phases of the moon.

Calculate the mass of the Earth using the sidereal and calendar period of the Moon and Newton's Law of Universal Gravitation in this physics science project!

Become familiar with ratios and learn how to measure the diameter of the Sun and the Moon in this fun science fair project idea.

This two-ingredient dough, sometimes called "moon sand," is a quick and cheap way to let kids explore their senses, build fine motor skills, and play.

What is a barycenter? Kids learn how gravity and mass influence the orbit of binary systems like planets and moons or stars and planets in this cool experiment.

Check out this fun science fair project idea for 1st grade: a solar eclipse model that demonstrates total, partial, and annular solar eclipses.

This experiment will explore the possibility of a connection between lunar cycles and how humans are affected.

How much gas is released into your stomach by your favorite beverages? This project examines which beverages produce the most gas.

Science fair project that explains and demonstrates the parallax principle.

This science fair project idea examines the distance a person travels on an average day and to relate that to an understanding of the size of the Earth.

Demonstrate the relationship between mass, volume and density. Measure displaced water, and weigh object to calculate mass and density.

The purpose of this science fair project is to investigate whether we can simulate how craters are formed and predict their size and shape.

How is NASA able to launch something into orbit around the Earth? Learn about the relationship between gravity, speed, and orbit in space in this cool project!

Do heavier objects fall faster than lighter ones? Students learn the answer by watching the effect gravity in a vacuum has on a coin and a feather.

This science fair project idea discovers the principle of conservation of mass.

Science fair project that determines whether mass and weight are the same or different.

This science fair project determines what effect substances have on ice, and which of these products most effectively melts ice.

In this science fair project, students evaluate if astrological signs provide clues about people's personalities.

How does dishwashing liquid work? Kids discover the chemical mechanism behind cleansing power in this easy science fair project idea.