Front

Earth and the other planets closest to the Sun are made mostly of _______

Back

rock

Front

The moon is a natural  ______ of Earth.

Back

satellite

Front

Earth's ________ on its axis causes day and night.

Back

rotation

Front

One kind of _______ is a crescent Moon.

Back

moon phase

Front

One full orbit of an object around another object is called a ________.

Back

revolution

Front

The __________ has planets, moons, comets, and asteroids.

Back

solar system

Front

One of the main differences between the outer and inner planets is __________.

Back

the outer planets are gas planets

Front

Order the planets based on their distance from the sun: Mercury, Earth, Venus, Jupiter, Mars, Uranus, Saturn, Neptune

Back

Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune

Front

Why does Earth have different seasons?

Back

because of the tilt of Earth on its axis as it moves around the sun

Front

Which factor makes Earth able to support life?

Back

The Earth has life-supporting liquid water and an oxygen-rich atmosphere.