Revision - New Frontiers

According to the text, select all the correct answers.

• The International Space Station has been orbiting above Earth since 2000.

• Gravity helps astronauts perform many different activities in space.

• Only astronauts from the United States work at the Space Station.

• Astronauts have to deal with unique challenges in space.

• Astronauts on the Space Station stay there for a year at a time.

What challenges do astronauts face when it comes to performing everyday activities in space, and how do they deal with these challenges?

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Notice that each paragraph is numbered. Number each heading below from 1 to 3, according to its appropriate paragraph.

• 2

• A Home in Orbit

• 1

• Space Challenges

• 3

• The Astronaut's View

A similarity between Earth and Mars is an axis that tilts at a 24 ​​ (a)   angle.

• degree
• advances
• background
• diameter
• wonder
• astronomer
• satellites
• fundamental

​ (a)   elements are the basic elements upon which other things depend.

• advances
• background
• diameter
• wonder
• astronomer
• satellites
• fundamental
• degree

Edwin Hubble is the American ​ (a)   for whom the famous telescope is named.

• advances
• background
• diameter
• wonder
• astronomer
• satellites
• degree
• fundamental

​ (a)   are an important technology for space exploration.

• advances
• background
• diameter
• wonder
• satellites
• degree
• fundamental
• astronomer

In math, the ​ (a)   of a round object is the length of a straight line that passes through its middle.

• advances
• background
• diameter
• wonder
• degree
• fundamental
• astronomer
• satellites

You might aspire to be an astronaut if you have the right educational ​ (a)   .

• advances
• background
• wonder
• degree
• fundamental
• astronomer
• satellites
• diameter

Match the definitions.

• atmosphere

• the layer of gases that surrounds the Earth. It is held in place by gravity and protects us from the sun's harmful radiation.

• plains

• a low area of land between hills or mountains, typically with a river or stream flowing through it.

• oceans

• a broad area of flat land with few trees.

• valleys

• vast body of salt water that covers most of the Earth's surface.