There are 8 ____ that circle around our sun. 2. Astronauts use ____ to travel in outer space. Scientists look for ____ on other planets as a sign of possible life. A ____ is the low land between mountains or hills. The low land close to a river is the ____. This land usually gets covered with water during a serious flood. When a lake is dry, we can see the bottom or the ____. A ____ is the path that a river takes on the land. ____ are large areas of ice on a planet, usually at the north and south poles. Scientists are using ____ to explore other planets. The most northern and southern parts of a planet are called ____. A ____ is a dry and sandy place with little water. If the temperature is very cold, water will become ____. Scientists take ____ of dirt, water or plants so that they can study them and learn. An ____ is a person who wants to go to a new place where people haven't gone. There hasn't yet been a ____ to the planet Mars. So far only robots have gone there, not humans. Astronauts wear ____ to protect themselves and to breathe. Astronauts have a lot of ____, or equipment, to do their jobs. Will humans set up ____ on Mars in the future? A place to live? We don't know! A ____ book or movie is a creative story about possible life in the future with advanced technology. Outer space is a new ____ for humans because we are only just beginning to learn about it and travel in it.

TABE 11 #5

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