Earth Science by National Geographic Society, Ralph M. Feather

By National Geographic Society, Ralph M. Feather

This booklet is helping youngsters to appreciate the full complexity and interdependences of other elements of nature.

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Copy and complete the following concept map about variables and constants. Possible Hypothesis: The amount of salt in water affects how fast brine shrimp eggs hatch. com/interactive_tutor CHAPTER STUDY GUIDE 27 (l)CABISCO/Visuals Unlimited, (r)Jan Hinsch/Science Photo Libray/Photo Researchers 544-CR-MSS05ges 8/20/04 1:23 PM bias p. 21 constant p. 10 control p. 10 dependent variable p. 10 Earth science p. 9 ethics p. 20 hypothesis p. 7 Page 28 independent variable p. 10 science p. 8 scientific law p.

22 CHAPTER 1 The Nature of Science Bates Littlehales/National Geographic Image Collection Self Check 1. 2. 3. 4. Explain why science is always changing. List ways a hypothesis can be supported. Compare and contrast scientific theory and scientific law. Determine What kinds of questions can’t be answered by science? 5. Think Critically When reading science articles, why should you look for the authors’ biases? 6. Draw Conclusions Describe what would have happened if the 1986 observations of Halley’s comet had not supported Dr.

She then wrote the words Prize Amethyst on top of the photo and asked ten more friends to rank the quality of color. 5 6 10 8 5 3 7 9 Solving the Problem 1. Examine the tables. 3 rated the amethyst? What effect did the hint have on them? 2. Do you think bias could affect the results of a scientific experiment? Explain. How could this bias be prevented? SECTION 2 Scientific Enterprise 21 Matt Meadows 544-S2-MSS05ges 8/20/04 1:25 PM Page 22 Figure 19 Scientists take detailed notes of procedures and observations when they do science experiments.

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