SPACE SCIENCE

Groups of stars held together by gravity are called _________.

• planets

• galaxies

• meteor

• spring

When the Sun, Earth, and Moon form a straight line we get a _______ tide.

• neap

• summer

• low

• spring

1. Twenty four hours is the amount of time it takes the Earth to _________ on its axis.

• rotate

• spring

• run

• revolve

1. A ____________ is the amount of time it takes the Earth to orbit the Sun.  

• rotation

• period

• length

• hour

Rocky objects (other than the planets) orbiting the Sun in the Solar System in a belt between Mars & Jupiter

• asteroids

• planets

• stars

• inertia

Without gravity holding planets in orbit, this property of matter would keep planets moving in a straight line

• gravity

• rotation

• revolution

• inertia

Other smaller rocky objects in the Solar System moving between planets

• asteroids

• stars

• planets

• meteoroids

When the Sun is at a 90° angle from the imaginary line formed by the Moon and Earth, we get a  _______ tide.

• spring

• neap

• short

• tall

This force keeps planets in orbit around the Sun

• inertia

• air resistance

• gravity

• weight

The four planets closest to our Sun are called _________.

(Select all that apply)

• Terrestrial planets

• Gas Giants

• Inner Rocky