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Series Glossary of Key Terms
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airlock
a room on a space station from which astronauts can move from inside
to outside the station and back
ammonia
a gas used in refrigeration; can be deadly if inhaled
biochemist
a scientist who studies the chemistry of living things
carbon dioxide
the type of gas that is in the air that we breathe out
cosmonauts
space travelers from the Soviet Union or Russia
deforestation
the destruction of forest or woodland
extravehicular
something that happens outside a vehicle, in this case a space
station
meteorology
the study of weather
physicist
a scientist who studies physics, which examines how matter and
energy move and relate
pulsars
a type of distant star that sends out radio waves
vacuum
the absence of air