grade 9 space

The collection of objects that orbits our Sun is called

• a. the solar system     
• b. Saturn 
• c. the galaxy
• d. the Universe

Which of the following planets is considered a gas giant?

• Earth
• Jupiter
• Mars
• Venus

Which of the following planets is an inner planet?

• Venus

• Jupiter

• Neptune

• Moon

Which planet has rings?

• Earth
• Jupiter
• Mars
• Saturn

What is the definition of an astronomical unit (AU)?

• a. the time it takes light to go from the Sun to Earth   
• b. the time it takes light to go from Earth to the Moon 
• c. the distance between the Sun and Earth   
• d. the distance between Earth and the Moon

What do you call a scientist who studies the objects in the night sky?

• astrologer
• astronomer
• meteorologist
• physicist

Which astronomical event determines the length of the year?

• a. the time it takes the Moon to revolve around Earth   
• b. the time it takes Earth to revolve around the Sun
• c. the time it takes Earth to rotate on its axis   
• d. the time it takes the Sun to go across the sky

What elements are fusing in the Sun that provides its energy?

• 2 hydrogen to 1 helium
• 2 helium to 1 hydrogen
• 2 helium to 1 oxygen
• 2 oxygen to 1 iron

How long does it take for the Moon to rotate around the Earth?

• 24 hours
• 27.6 days (1 month)
• 365 days
• 12 months

How many moons does Mars have?

• 0
• 1
• 2
• 63