Chapter 2: Exploring Space

For every force, or action, there is an equal and opposite force, or ​ ​ (a)  

• reaction
• force
• vacuum
• gravity

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NGSS.MS-PS2-1

​ (a)   is a reaction force that propels an object forward.

• Thrust
• reaction
• rocket

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Who said “That’s one small step for man, one giant leap of mankind." ​ (a)  

• Neil Armstrong
• John Glenn
• Susan B. Anthony

What do you call the lunar samples collected by Apollo astronauts? ​ (a)  

• moon rocks
• coal rocks
• astroids

(True or False) The moon has natural moonquakes that are weaker than earthquakes on Earth. ​ (a)  

• True
• False
• Maybe

What do you call an object that revolves around another object in space? ​ (a)  

• satelllite
• vacuum
• space probe

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Some probes have small robots called ​ (a)   that can move about on the surface of another planet or moon.

• rovers
• satellite
• vacuum

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A large artificial satellite in which people can live for long periods is called a (n) ​ (a)  

• space station
• space shuttle
• space probe

The space probe Opportunity, explored which planet? ​ (a)  

• Mars
• Venus
• Jupiter

An item that has uses on Earth but was developed fo space is called a(n) ​ (a)  

• space spinoff
• microgravity
• rover