Manned Space Exploration

The space shuttle carries astronauts back and forth between Earth and the International Space Station in orbit around our planet. What feature is necessary for the space shuttle to perform its function? The space shuttle must have -

• sufficient mass to provide gravity equal to that of Earth.

• powerful engines to escape the pull of Earth's gravity.

• enough food for the astronauts to eat for several years.

• adequate space in which the astronauts can float freely.

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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

A tether is a rope-like device that attaches an astronaut to a space vehicle during the time spent outside on a spacewalk. Why is a tether necessary?

• Strong solar winds would blow the astronaut away from the vehicle otherwise.

• Astronauts must remain close to the vehicle to obtain the heat it provides.

• Without a tether, astronauts would float away due to the lack of gravity in space.

• Tethers add just enough weight to the astronaut to keep them in orbit.

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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__________ __________ is the investigation of physical conditions in space and on stars, planets, and other celestial bodies through the use of satellites, space probes, or spacecraft with human crews.

• Space shuttle

• Space probing

• Space Exploration

• None of the above

What is one reason astronauts working outside the International Space Station need to wear space suits? The space suits -

• make it easier to identify the astronauts.

• help the astronauts float freely in space.

• have communication devices in the helmet.

• provide essential food and water for survival.

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

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

• oxygen.

• gravity.

• protection.

• communication.

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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