Space Exploration

Why is it necessary for astronauts on the International Space Station to generate and recycle oxygen?

• Oxygen provides energy for the station's fuel tanks.

• There is not enough oxygen in space to sustain life.

• Oxygen protects the space station from radiation.

• Oxygen is a by-product of human respiration.

Some scientists are planning a manned space mission to a rocky planet slightly farther from the Sun than Earth. To which planet are they sending astronauts?

• Mercury

• Venus

• Mars

• Jupiter

Astronauts walking in space must wear space suits. The space suits provide all of the following EXCEPT -

• oxygen.

• gravity.

• protection.

• communication.

A fly-by mission involves sending a spacecraft past a planet without landing on it. During the relatively short time the spacecraft speeds moving past a planet, it is able to -

• gather information on how the planet changes.

• conduct in-depth studies of the planet's surface.

• deposit astronauts on the planet for further study.

• transmit close-up images of the planet back to Earth.

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Ancient people could not travel to the Moon. However, they could make observations of the Moon that allowed them to describe the -

• composition of the Moon's atmosphere.

• amount of gravity exerted by the Moon.

• types of minerals found in the Moon's soil.

• physical features on the Moon's surface.

Which of the following pieces of equipment helps scientists control spacecraft and analyze data received from space?

• Computers

• Telescopes

• Rockets

• Cameras

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A space probe, a satellite, and a manned rocket all share what characteristic? They must be able to -

• collect rocks and soil samples.

• communicate with people on Earth.

• transport equipment to the International Space Station.

• provide areas for conducting experiments.

The International Space Station (ISS) is a huge science laboratory that orbits Earth every 92 minutes. Experiments on board the ISS can help scientists learn -

• why Earth rotates on its axis every day.

• what substances are found in moon dust.

• when the first green plants appeared on Earth.

• how to solve problems of living in space.

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What is an important requirement for a manned spacecraft traveling through space?

• The ability to create its own gravity

• Bright lights to see where it's going

• A device for growing food for humans

• A supply of oxygen for the astronauts

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Which of the following is the first challenge that had to be overcome by rockets in order for humans to explore space? First, rockets needed -

• a place in which the astronauts could sit.

• a way to return to Earth's surface.

• enough thrust to overcome Earth's gravity.

• landing gear that worked on another planet.

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