__________holds all of the planets in orbit around the sun.

• Force
• Motion
• Weight
• Gravity

The sun and everything that revolves around it.

• solar system
• galaxy
• universe
• rotation

It takes Earth _____________ to make one revolution or orbit around the Sun.

• 365 days
• 365 hours
• 28 days
• 24 hours

If it is winter in the Northern Hemisphere, what season is it in the Southern Hemisphere?

• Spring
• Fall
• Winter
• Summer

What is the name of the planet that we are living in ?

• Mars

• Earth

• Mercury

• Jupiter

Scientists that study objects beyond our planet are called _____

• physicists
• biologists
• astronomers
• chemists

Who was the pilot of the Apollo 11 and the second person to walk on the Moon?

• Buzz Aldrin

• Neil Armstrong

• Guion Bluford

• Yuri Gagarin

Who was the first human to go into outer space and orbit the earth?

• Buzz Aldrin

• Neil Armstrong

• Guion Bluford

• Yuri Gagarin

Special protective clothes worn by astronauts in space

• Neil Armstrong & Buzz Aldrin 
• space suit 
• Astronaut
• light-year

Choose the word that has the main stress placed differently from that of the others.

• conquest

• venture

• technical

• artificial