7.9b science

What makes it hard for an astronaut to breathe in space?

• harsh temperatures

• is an airless vacuum

• heavy equipment

• the air pressure

Astronauts need all of the following to survive in space EXCEPT-

• gravity

• oxygen to breathe

• exercise

• protective clothing

An astronaut is trying to move from one area of the space shuttle to another. What accommodations does this astronaut need?

• velcro boots

• spacesuit

• handle bars

• oxygen

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Space stations require an oxygen system because the atmosphere in space -

• is airless

• is poisonous

• smells bad

• is humid

Radios are not required for astronauts to talk to each other when they are in the same room inside the space station because -

• A space station is filled with air that carries sound waves

• astronauts keep their helmets on inside the space station

• computers are used to communicate inside the station

• astronauts communicate with sign language in the space station

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Astronauts wear thick gloves when they perform a space walk outside the space station. The gloves provide protection against -

• low gravity

• nearby comets

• low oxygen

• low temperatures

Spacesuits have layers that have high capacity for thermal insulation in order to -

• regulate body temperature in the extremes of space

• prevent the spread of bacteria that thrive in space

• allow communication with the space station

• prevent the astronaut from sweating inside the suit

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What design element of an astronaut’s spacesuit protects him or her from micrometeoroids, which are tiny bits of space debris travelling at high speeds?

• large oxygen tank

• powerful jet packs

• small radio communicator

• tough outer shell

What accommodations have been designed to protect astronauts from micrometeoroids hitting their spacesuits?

• jet packs

• land rovers

• removable straps

• multilayered spacesuits

Which of these is NOT essential for habitability?

• Temperature
• Liquid Water
• Atmosphere
• Bacteria