Week 8

1. Week 8

2. 1. Humus is made up mainly of • Weathered rock fragments • Unjointed bedrock • Organic material • Iron particles

3. 2. Which of the following rocks is most likely to weather quickly? • An exposed rock on a plain • an exposed rock on a slope • a buried rock on a plain • A buried rock on a slope

4. 3. Glaciers weather surface rock mostly through the process of • Oxidation • carbonation • Abrasion • decomposition

5. 4. Which of the following soil types have the smallest particle size? • Silt • Sand • Clay • Gravel

6. 5. Which of the following generally will weather and erode most rapidly? • Limestone • Obsidian • Granite • Gneiss

7. 6. Which of the following minerals will be most resistant to weathering? • Calcite • Feldspar • Sandstone • quartz

8. 7. What is one thing a scientist can do to ensure an experiment will be reproducible by others? Use materials that are difficult to obtain. Write notes in a shorthand used only in a particular lab Write very detailed steps that clearly explain what was done. Do the experiment on a bright sunny day

9. 8. A scientist finds that the levels of a certain chemical in a local water supply have risen over the past month. This is an example of Analyzing data Collecting data Organizing data Communicating data

10. 9. A scientist trying to develop a new procedure to answer a questions might look through other investigations and especially review the Purpose Methods Data conclusions

11. 10. If an experiment has wet chemicals that can splash on your clothes, what safety equipment should be worn? Gloves Goggles Gloves and goggles Apron