Science is the study of the world around us. Scientists learn about their subject by observing, describing, and experimenting. There are many subjects and branches of science.
Some study outer space like astronomy. Other sciences study life (biology) or the earth (geology) or even matter and energy (physics).
Here are some discoveries:
Marie Curie is remembered for her discovery of radium and polonium, and her huge contribution to finding treatments for cancer.
Dr. Hawking is best known for his discovery that black holes emit radiation which can be detected by special instrumentation.
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| Black Holes are fascinating |
A black hole is a place in space where gravity pulls so much that even light can not get out. The gravity is so strong because matter has been squeezed into a tiny space. This can happen when a star is dying. Because no light can get out, people can't see black holes. They are invisible.
End of the unit.
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