Term
| what is the goal of science? |
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Definition
| is to investigate and understand nature, to explain events in nature and to use those explanations to make useful predictions |
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Term
| when should a hypothesis be tested? |
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Definition
| should be tested by an experiment in which only one variable is changed at a time all other variables should be kept unchanged or controlled |
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Term
| what does the word theory apply to? |
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Definition
| to a well tested explanation that unifies a broad range of observations |
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Term
| what are the characteristics living things share? |
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Definition
-living things are made up of units called cells
-living things are reproduced
-living thins are based on a universal genetic code
-living things grow and develope
-living things obtain and use materials and energy
-living things respond to their enviroment
-living things maintain a stable internal enviroment
-taken as a group, living things change over time |
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Term
| what do the levels of life include? |
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Definition
| molecules, cells, organism, communities of population living in the same area and the biosphere |
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Term
| what measurements do most scientists use? |
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Definition
| most scientists use the metric system when collecting data and performing experiments |
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Term
| how are light microscopes and electron microscopes similar and how are they different? |
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Definition
| light microscopes produce magnified images by focusing visible light rays, electron microscopes produce magnified images by focusing beams of electrons |
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