1. EARTH SYSTEMS REVIEW Tuesday, January 15, 2013

2. 1. Soil erosion happens when soil is carried away by wind and water. Which of the following is a good way for a farmer to keep wind from eroding the soil in a field? a. Spraying the field with chemicals b. Plowing the field c. Removing weeds growing around the crops d. Planting trees along the edge of the field

3. 2. Which type of earth material will water move through the fastest? a. Solid rock b. Sandy soil c. Clay soil d. Potting soil

4. 3. Some high mountains have a U- shaped valley that stretches to the sea. What probably created the valley? a. A volcano b. An earthquake c. A glacier d. A fast moving river

5. Which fossil layer is the oldest? ABCDEABCDE

6. The table describes how sedimentary rocks are formed. What is missing from the table? A. sediment is covered with water. B. sediment is squished together C. sediment is covered by plants D. sediment is turned to oil. Cementation Water evaporates and minerals lock together until they are hard as a rock! Compaction ?????? Deposition Sediment is dropped in an area. Erosion Sediments are moved from one place to another. Weathering Rock is broken down by wind, water or ice. What happened first.