Solar System

Which of the following terms match the definition below?

"To spin around on an axis"

• revolve

• orbit

• rotate

• axis

How long does it take for Earth to rotate or spin on its axis?

• 24 hours
• 1 year
• 365 days
• 12 months

About how long does it take for the moon to revolve around Earth one time?

• 28 days

• 1 year

• 1 day

• 24 hours

If scientists discovered a large, round object revolving around a star, that object would be considered a...

• moon
• planet
• star
• solar system

Which is true of stars and planets?

• Stars move through the sky, but planets do not. 
• Stars are the brightest objects in the night sky.
• It is easier to see planets than stars because planets glow with heat.
• Stars and planets both move. 

"A group of objects in space that orbit a star in the center, plus the star" can be called a ____________.

• solar system

• galaxy

• universe

• asteroid belt

In one year, Earth ________ around the sun. 

• revolves
• rotates

Inner and outer planets differ in many ways.  Which of the following is not true?

• Inner planets are smaller than outer planets. 
• Inner planets are called the rocky planets, while outer planets are known as the Gas Giants. 
• Outer planets have no rings, while the inner planets all have rings.
• The inner planets have fewer moons than the outer planets. 

Why do stars appear to move from east to west in the night sky? 

• Earth's rotation
• Earth's revolution

Which statement BEST explains why the sun appears to rise in the east and set in the west?

• Earth orbits the sun. 
• The moon orbits Earth.
• Earth rotates on its axis. 
• The sun orbits Earth