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?

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

• 1

• The Astronaut's View

• 2

• Space Challenges

• 3

• A Home in Orbit

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.

• oceans

• 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 broad area of flat land with few trees.

• atmosphere

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

• valleys

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