America's Children and the Environment - download pdf or read online

By US Environmental Protection Agency

ISBN-10: 1428900047

ISBN-13: 9781428900042

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Extra resources for America's Children and the Environment

Example text

Today, most students research topics by using a computer and searching for information on the Internet. The Internet can provide students with a wealth of information. But which Web sites have accurate information, and which Web sites do not? I Checking Web Addresses Students should use the Web address, or URL, to establish the Web site’s credibility. Usually, the domain name can suggest who has published the Web site. com). Government Web sites are usually reliable. Examples of credible governmental Web sites are the National Institutes of Health (NIH) and the Food and Drug Administration (FDA).

Make sure the lamp is evenly positioned between the two cups. 6. Before turning on the lamp, record the initial temperature of each cup of sand in your data table. 7. Note the time or start the stopwatch when you turn on the lamp. The lamp will become hot and warm the sand. Check the temperature of the sand in each container at one-minute intervals for 10 minutes. Record the temperature of the sand after each minute in your data table. PART B Comparing the Density of Oil and Water 8. In your lab report, prepare a data table similar to Table B below.

In the owl experiment, biologists extended their vision with infrared cameras. Analyzing and Comparing Data After collecting data from a field study or an experiment and then organizing it, biologists then analyze the data. In analyzing data, the goal is to determine whether the data are reliable, and whether they support or fail to support the predictions of the hypothesis. To do so, scientists may use statistics to help determine relationships between the variables involved. They can then compare their data with other data that were obtained in other similar studies.

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America's Children and the Environment by US Environmental Protection Agency

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