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mock test
Match the vocab word to the definition.
- 1. exoplanet
- 2. comet
- 3. star
- 4. nebula
- a. a cloud of gas and dust in outer space, visible in the night sky either as an indistinct bright patch or as a dark silhouette against other luminous matter
- b. sphere of gas massive enough to generate light and heat through nuclear reactions that transform hydrogen to helium in its core
- c. small icy body that partially evaporates as it approaches the sun; composed gas and dust
- d. a planet that orbits a star outside the solar system
mock test (Answer Key)
Match the vocab word to the definition.
- d 1. exoplanet
- c 2. comet
- b 3. star
- a 4. nebula
- a. a cloud of gas and dust in outer space, visible in the night sky either as an indistinct bright patch or as a dark silhouette against other luminous matter
- b. sphere of gas massive enough to generate light and heat through nuclear reactions that transform hydrogen to helium in its core
- c. small icy body that partially evaporates as it approaches the sun; composed gas and dust
- d. a planet that orbits a star outside the solar system
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