review quiz for 7th space test on Monday

Astronauts must exercise regularly while in space to prevent their

​ (a)   and bones from becoming weak.

• muscles
• blood
• heart
• vessels
• liver

Tags

112.19.b.9.B

​ (a)   are used in space for

astronauts to communicate with each other and the mission team on Earth.

• radios
• telephones
• cellular devices
• headphones
• stereos

Tags

112.27.b.9.C

Earth’s ____________________________ helps protect life from ultraviolet radiation.

• ozone layer

• oxygen content of atmosphere

• presence of water

• proximity to the Sun

Tags

112.27.b.9.C

Earth’s atmosphere is mostly made up of the gases ___________________________ and

_______________________________.

• Nitrogen and Carbon Dioxide

• Oxygen and Carbon Dioxide

• Nitrogen and Oxygen

• Argon and Nitrogen

Tags

112.27.b.9.C

The helmet on the spacesuit must be made of a tough plastic. The plastic must be tinted to protect an astronaut's eyes from the blinding light of the ​ (a)   .

• Sun
• moon
• meteor
• Earth

Tags

112.27.b.9.C

Which of the following characteristics of a planet will have the

greatest influence on determining whether or not its temperature

will be suitable to support life?

• A The amount of its gravitational force.

• B The number and size of active volcanoes.

• C The tilt of the axis of rotation of the planet.

• D The distance from the Sun of its orbit.

Tags

112.19.b.9.B

Even though the moon is in the habitable zone, why is there no life there?

• no atmosphere

• No water

• Exposed to solar radiation

• All of these are correct

Proximity to the Sun means...

• A proximity warning is given to an astronaut when the oxygen level in the spacesuit drops below 10 pounds/square inch of atmosphere

• The intensity of the Sun's radiation on Earth

• How close an object in our solar system is to the Sun

• none of theses

Why is the Sun important to life on Earth?

• The Sun's radiant energy is converted to food by plants in a process called photosynthesis

• The Sun's radiant energy is converted into liquid water

• Radiant energy from the Sun is absorbed and released in a delicate balance for life to exist.

• none of these

The atmosphere is important to life on Earth because...

• The atmosphere keeps thunderstorms from becoming too large and causing catastrophic damage to Earth

• blocks the Sun's dangerous radiation and traps heat making Earth a comfortable temperature

• The atmosphere traps cold air just above the surface and without this cold air we would not receive the rain that we needed.

• none of these