1. Daily Warm-Up Exercises1 Day 12 How can sand being carried by a river eventually become sandstone? When the river slows, the sand settles and forms a layer. Over time, new layers of sand continue to form, pressing down on older layers beneath them. The pressure squeezes the grains of sand tightly together, and a cementing agent helps hold the grains together.

2. Compare Rock Formation, Part 22 Contrasting Case Activity 3 Earth History, Investigation 4

3. Compare Rock Formation, Part 23 Igneous Rock Formation How do igneous rocks form? Igneous rocks form when molten rock cools and hardens. How can you show the formation of igneous rock on the Rock Cycle diagram?

4. Igneous Rock Metamorphic Rock molten rock sediments Sedimentary Rock Compare Rock Formation, Part 2 4 The Rock Cycle cools & hardens

5. Compare Rock Formation, Part 25 Molten Rock Formation What is molten rock? Molten rock is melted rock. How can rock melt? Rock melts when it is exposed to the extreme heat found deep underground. What type(s) of rock can melt? All three types. How can you show this on the diagram?

6. Compare Rock Formation, Part 26 The Rock Cycle melts due to extreme heat cools & hardens Igneous Rock Metamorphic Rock molten rock sediments Sedimentary Rock

7. Compare Rock Formation, Part 27 Metamorphic Rock Formation How does a metamorphic rock form? A metamorphic rock forms when an existing rock changes due to heat and/or pressure. What type(s) of rock can change to form a metamorphic rock? All three types. How can you show this on the diagram?

8. Compare Rock Formation, Part 28 The Rock Cycle melts due to extreme heat cools & hardens changes due to heat &/or pressure Igneous Rock Metamorphic Rock molten rock sediments Sedimentary Rock

9. Compare Rock Formation, Part 2 9 Grain Formation Where does the sand in sandstone come from? Existing rocks break apart into small particles to form sand, silt, and other sediments. What natural processes could break rocks into small particles? Physical weathering, like ice wedging, abrasion, plant growth, and thermal breakage. Also chemical weathering, like when water & acids dissolve minerals

10. Compare Rock Formation, Part 210 Sediment Formation Once the sediments are formed, how do they pile up? Through erosion, transport, and deposition. What type(s) of rock can weather, erode, move and settle? All three types. How can you show this on the diagram?

11. Compare Rock Formation, Part 2 11 The Rock Cycle Igneous Rock Metamorphic Rock molten rock sediments Sedimentary Rock weathers, erodes, moves & settles melts due to extreme heat cools & hardens changes due to heat &/or pressure

12. Compare Rock Formation, Part 212 Sedimentary Rock Formation Once the layers of sediment build up, two processes change the sediments into a rock. What is the first process? New layers press down on old layers, compacting the particles together. What is the second process? A cementing agent helps hold the particles together. How can you show this on the diagram?

13. Compare Rock Formation, Part 2 13 The Rock Cycle get compacted & cemented together weathers, erodes, moves & settles melts due to extreme heat cools & hardens changes due to heat &/or pressure Igneous Rock Metamorphic Rock molten rock sediments Sedimentary Rock

14. get compacted & cemented together melts due to extreme heat cools & hardens changes due to heat &/or pressure Compare Rock Formation, Part 2 14 The Rock Cycle Igneous Rock Metamorphic Rock molten rock sediments Sedimentary Rock weathers, erodes, moves & settles

15. How are rocks broken down? Weathering –Physical and chemical processes –Rocks are broken down Erosion –Rock pieces are picked up by wind or water Transportation –Rock pieces are moved Deposition –Sediments are stop moving and settle in one place Compare Rock Formation, Part 215

16. Rock Cycle Definition A series of processes that cause rocks to change from one type to another. Processes like weathering, erosion, transportation, deposition, compaction, cementation, melting, cooling, heat and pressure Compare Rock Formation, Part 216