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The study of the universe.
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The gaseous envelope surrounding Earth.
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The cause-and-effect relationship in which one variable controls the changes in another variable.
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A group in a lab experiment that is not exposed to the tested variable.
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A close relationship between two variables in an event or situation.
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| A condition or factor which is affected by another factor or factors. |
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| A group in a lab experiment that is exposed to the tested variable. |
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| The study of the origin, history, and structure of Earth. |
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| The portions of Earth made up of rock. |
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| The study of the movement and distribution of water and ice on Earth. |
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| All oceans, rivers, lakes, ponds, and ice on Earth's surface. |
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| An educated guess that is tested with data. The second step in the scientific method. |
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| The condition or face which can be manipulated in an experiment and which influences another factor. |
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| The study of Eath's atmosphere and weather. |
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| A unifying concept that forms the basis of scientific investigation in a particular field. |
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| A series of steps that scientists use to guide their reasoning while conducting science. |
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| MASA is an acronym for the National Aeronautics and Space Administration, an agency headquartered in Washington, D.C., which conducts research and development on space and flying. |
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| A condition or factor involved in an experiment. |
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| A scientific idea supported by evidence but not necessarily proven. |
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