The Solar System 4 th Grade Science

Science Standards S4E2. Students will model the position and motion of the earth in the solar system and will explain the role of relative position and motion in determining sequence of the phases of the moon. D. Demonstrate the relative size and order from the sun of the planets in the solar system.

The Solar System

Sun The Sun is our closest star. The Sun makes up 99% of the solar system's mass and is the center of our solar system. Like all of the plants in our solar system, the Sun also rotates on an axis (one rotation is Earth days). The Sun is so big it could hold over a million Earths in its interior.

Mercury Mercury is the planet closest to the Sun in our Solar System. It is the smallest planet in our solar system. It takes 88 Earth days for Mercury to orbit the sun once.

Venus Venus is the second planet from the sun in our solar system. It takes Earth days for Venus to orbit the sun once.

Earth The Earth is the third planet from the Sun in our Solar System. The Earth is the fifth- largest planet in our Solar System. Each year on Earth takes Earth days.

Mars Mars is the fourth planet from the sun in our solar system. It is about half the size of Earth. A year on Mars takes 687 Earth days. That is almost 2 earth years.

Jupiter Jupiter is the fifth and largest planet in our solar system. Jupiter is so big that all the other planets in our Solar System could fit inside Jupiter if it were hollow. It takes Earth years for Jupiter to orbit the sun once.

Saturn Saturn is the sixth planet from the sun in our solar system. It is the second-largest planet in our solar system. It takes Earth years for Saturn to orbit the sun once.

Uranus Uranus is the seventh planet from the sun in our solar system. It is the third-largest planet in our Solar System. It takes Earth years for Uranus to orbit the sun once.

Neptune Neptune is the eighth planet from the sun in our solar system. Neptune is the fourth largest planet in our Solar System. It takes almost 165 Earth years for Neptune to orbit the sun once.

Works Cited s255students/mekoski/p4/mercury.html