SOILS ROCKS AND LANDFORMSInvestigation 1 Part 2 Physical

SOILS, ROCKS, AND LANDFORMS—Investigation 1, Part 2: Physical Weathering Complete Teacher Notes

Investigation 1, Part 2 Focus Question Review: What is soil? What causes big rocks to break down into smaller rocks? IG pg. 105, Steps 1– 3

Investigation 1, Part 2 Granite and Conglomerate What are the properties of Granite Conglomerate How can you break these pieces of granite and conglomerate rock into smaller pieces? IG pg. 105– 106, Step 4

Investigation 1, Part 2 Rock Tumble Materials: 4 pieces of granite or conglomerate 1 jar with lid 1 paper plate 4 hand lenses 4 pairs of safety goggles Procedure: 1. Record your observations using both descriptive words and drawings. IG pg. 105– 106, Steps 4– 6

Investigation 1, Part 2 Comparing the Tumbled Rocks Compare the results of the tumbled granite and the tumbled conglomerate. What is the effect of tumbling the rocks? How do they compare to the control rocks? IG pg. 106, Step 7

Investigation 1, Part 2 Physical Weathering weathering: physical weathering: abrasion: IG pg. 107, Step 8

Investigation 1, Part 2 Clean Up! • Return the jars, hand lenses, and rock pieces to the materials station. • Return rock pieces to the correct storage bags. IG pg. 108, Step 9

Investigation 1, Part 2 Freezing Investigation Water freezes at 0°C. What do you think will happen to this bottle of water if I put it in the freezer overnight? This bottle-water system will serve as a model of what might happen in the natural world. IG pg. 108, Step 10

Investigation 1, Part 2 Frozen Bottle of Water What happened to the bottle? Why do you think this happened? IG pg. 108– 109, Step 11

Investigation 1, Part 2 Freezing and Thawing When water freezes, it expands—it gets bigger. When the water freezes in a crack in a rock, what might happen to the rock? IG pg. 108– 109, Step 11

Investigation 1, Part 2 Vocabulary Review weathering the process by which larger rocks crack and break apart over time to form smaller rocks physical weathering the process by which rocks are broken down by breaking and banging abrasion the rubbing, grinding, and bumping of rocks that cause physical weathering freeze to change from a liquid to a solid state as a result of cooling expand to get bigger; to take up more space IG pg. 109, Step 12

Investigation 1, Part 2 Focus Question What causes big rocks to break down into smaller rocks? IG pg. 109, Step 13

Investigation 1, Part 2 Response Sheet – Investigation X Attach the Response Sheet to the next available left-hand page in your notebook. Write your response on the facing page. IG pg. 110, Step 14

Investigation 1, Part 2 Wrap-Up/Warm-Up What causes big rocks to break down into smaller rocks? Pair up with a partner to • compare your answers to the focus question; • share your answers to the response sheet. IG pg. 111, Step 15

Investigation 1, Part 2 Soils, Rocks, and Landforms FOSS Program Overview