Our Solar System Neighbors in Space Green Book

Our Solar System Neighbors in Space (Green Book)

Ch. 1 Vocabulary

• Planet • Rotates • Axis • Rotation • Revolves • Revolution • Gravity • Tides Ch. 1 Vocabulary Words

Planet • Definition • A large, round object that revolves around the sun • Sentence • Mercury is the planet that is closest to the sun. This Photo by Unknown Author is licensed under CC BY-SA

Rotates • Definition • Spin on an axis • Sentence • Earth rotates on its axis.

Axis • Definition • An imaginary line around which an object spins. • Sentence • Earth’s axis is tilted. .

Rotation • Definition • The spinning of an object on its axis • Sentence • Earth makes one rotation on its axis everyday.

Revolve • Definition • Moves around an object • Sentence • All eight planets revolve around the sun.

• Definition • The movement of one object around another object Revolution • Sentence • Earth makes one revolution around the sun in one year.

Gravity • Definition • A pulling force between two objects • Sentence • Gravity causes tides on Earth.

Tide • Definition • The rise or fall of the oceans • Sentence • The beach is wider at low tide.

Ch. 2 Vocabulary

Ch. 2 Vocabulary Word Solar system

• Definition • The sun and all objects that move around the sun • Sentence • There are eight planets in the solar system. Solar System

Ch. 3 Vocabulary

• Dwarf planet • Asteroids • Comets • meteor Ch. 3 Vocabulary Words

Dwarf planet • Definition • An object in the solar system that is larger than most objects but smaller than a planet • Sentence • Pluto is now called a dwarf planet.

Asteroid • Definition • A chunk of rock that revolves around the sun • Sentence • Most asteroids are between Mars and Jupiter.

Comets • Definition • A chunk of ice and rock that moves around the sun • Sentence • A comet can form a long tail when it moves toward the sun.

Meteor • Definition • A rock from space that burns up as it enters Earth’s air • Sentence • The meteor made a beautiful streak across the sky.