CKLA 3rd Grade Unit 5 Lesson 1 Vocabulary

Front

What is the atmosphere?

Back

An invisible, protective blanket of air around Earth and other heavenly bodies.

Front

Axis

Back

an imaginary straight line through the middle of an object, around which that object spins

Front

Eclipse

Back

an event that occurs when one object in outer space blocks the sunlight reaching another object

Front

Hemisphere

Back

half of the sphere of Earth

Front

Universe

Back

all objects and matter in space including Earth and beyond

Front

Planet

Back

a round object in space that orbits a star

Front

Orbit

Back

the curved path something in space takes around another object in space; planets move in an orbit around the sun

Front

Solar System

Back

our star system, centered on the Sun, a yellow star, containing eight planets (Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune), dwarf planets (like Pluto), moons, asteroids, and comets, all held together by gravity within the Milky Way galaxy

Front

Rotate

Back

to turn about an axis or a center

Front

Tilted

Back

slanted or tipped to one side