ch 26 science vocab Word Scramble
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Question | Answer |
astronomy | the scientific study of the universe |
galaxy | a collection of stars, dust, and gas bound together by gravity |
astronomical unit | the average distance between the Earth and the sun; approximately 150 kilometers |
electromagnetic spectrum | all of the frequencies or wavelengths of electromagnetic radiation |
telescope | an instrument that collects electromagnetic radiation from the sky and concentrates it for better observation |
refracting telescope | a telescope that uses a set of lenses to gather and focus light from distant objects |
reflecting telescope | a telescope that uses a curved mirror to gather and focus light from distant objects |
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