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 1 Biosphere — Basic Story

People who fly in space have to eat food that they bring from Earth. In the future, these people will grow their
own food.
Scientists are getting ready for the future by living in a biosphere in Arizona. In 1989, eight people began living
inside the biosphere. They were sealed off from the outside world. They grew their own food.
A scientist said that we will need some kind of life system on another planet.
A new project is called Biosphere Two. Many different areas will be put in the biosphere. It will copy the
oceans, the tropics, and a rain forest. A small desert and a tiny swamp will also be put in. A greenhouse will
help them grow food.
They will try to grow all of the food they need with no help from outside. If they can do this, then it could be
done on another planet that does not have any plants growing on it.
The idea has been tried already on a small scale. On a desk in an office, two tiny shrimps have lived two years
in a sealed globe.

 2 biosphere

sealed space to experiment with growing food

 3 desert

a hot, dry place

 4 Earth

the planet we live on

 5 future

the time yet to come

 6 greenhouse

a small building for growing plants

 7 planet

a large object in space that moves around the Sun

 8 scientist

someone who studies science

 9 shrimp

small animals that live in the ocean

 10 tropics

a hot and wet area near the equator

 11 sealed

tightly closed so nothing gets in or out

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