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Rocks and Minerals
Question | Answer |
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Name the 5 characteristics a substance must have to be called a mineral. | 1. Solid 2. Naturally occurring 3. Nonliving 4. Definite chemical composition 5. Atoms arranged in a regular repeating pattern |
What is luster? | The way a mineral shines in reflected light |
What is streak? | The color of a minerals powder |
What is hardness? | A minerals resistance to being scratched |
Hardness is measured using | Moh's scale |
Why is color the least useful property in mineral ID? | Many minerals are the same color. |
What is the difference between cleavage and fracture? | Cleavage means breaking on flat planes and fracture means breaking unevenly |
How are igneous rocks formed? | When melted rock solidifies |
What is the difference between lava and magma? | Lava is melted rock above ground and magma is melted rock below ground. |
How are sedimentary rocks formed? | They are formed when particles of other rock or precipitates are compacted and cemented together. |
How are metamorphic rocks formed? | Existing rock undergoes heat and pressure |
What is weathering? | When elements break larger rocks into smaller pieces. |
What is erosion? | When weathered rock is moved to a new location by wind, water, or glaciers. |
What is deposition? | When eroded rock gets dropped in a new location |
The rock cycle states that all rocks come from | OTHER ROCKS!!!!! |
Using your Rock Cycle Diagram, explain how a igneous rock would become a sedimentary rock. | Igneous rock could be weathered and eroded into sediment. The sediment could be compacted and cemented into sedimentary rock. |
Using your Rock Cycle diagram, explain now sediments could end up in a metamorphic rock. | Sediments could be compacted and cemented into sedimentary rock. Then the sedimentary rock could be placed under extreme heat and pressure to become a metamorphic rock. |