1) scientists who study life in the universe a) astrobiologist b) microbes c) colony d) sensors e) radiation f) rovers 2) the smallest living things a) astrobiologist b) microbes c) colony d) sensors e) radiation f) rovers 3) a group of animals living in one place a) astrobiologist b) microbes c) colony d) sensors e) radiation f) rovers 4) devices that detect changes in light, moisture, or other physical conditions a) astrobiologist b) microbes c) colony d) sensors e) radiation f) rovers 5) dangerous energy rays that cannot be seen a) astrobiologist b) microbes c) colony d) sensors e) radiation f) rovers 6) vehicles used to explore a planet’s surface a) astrobiologist b) microbes c) colony d) sensors e) radiation f) rovers 7) The __________ studies life in the universe.   a) astrobiologist b) microbes c) colony d) sensors e) radiation f) rovers 8) The scientist studied the __________ under the microscope.   a) astrobiologist b) microbes c) colony d) sensors e) radiation f) rovers 9) A __________ of bees lives in the hive.   a) astrobiologist b) microbes c) colony d) sensors e) radiation f) rovers 10) The __________ can detect when a person walks by.   a) astrobiologist b) microbes c) colony d) sensors e) radiation f) rovers 11) The machine uses __________ to take an x-ray.   a) astrobiologist b) microbes c) colony d) sensors e) radiation f) rovers 12) A Mars __________ is a remote-controlled motor vehicle designed to travel on the surface of Mars. a) astrobiologist b) microbes c) colony d) sensors e) radiation f) rover

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