Daily Warm-Up Exercises Day 16 Describe the processes that cause rocks to change from one form to another. Any type of rock can melt and then cool to form an igneous rock. Any type of rock can weather, erode, move, and settle to form sediments, which can get compacted and cemented together to form a sedimentary rock. Any type of rock can be changed by heat and/or pressure to form a metamorphic rock. What does compacted mean? to get squeezed or pressed together so it takes up less space What does cemented mean? to get stuck together What causes the pressure on a rock beneath Earth's surface? the weight of all the rock above it Daily Warm-Up Exercises Daily Warm-Up Exercises

Observe Sand Samples (Part 2) Investigation 4 My Sediments Exactly

New Sands Sand samples from different locations Beach Mountain Stream Sand Dune

Sand Investigations Use a hand lens to examine the sand samples. Record your observations on the Sand Observations worksheet.

Sand 1 Sand 1 is from a mountain stream: Grains were not carried far from the source rock Wide variety of sizes Not well rounded or sorted Sharp edges

Sand 2 Sand 2 is from a beach: Grains were moved a great distance from their source by water Tumbled by waves Uniform in size Composed of mostly quartz particles Well rounded

Sand 3 Sand 3 is from a sand dune Grains were buffeted by wind in a dry environment Have some flat sides Well-sorted Frosted appearance

Mystery Sand How can we identify the source? Record your observations and identifications on your worksheet.