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6thscience chapter 2

science for sixth graders

What is the softest mineral? Talc
What is the Hardest mineral that can scratch a steel file? Diamond
How many known minerals are there? 4000
Can minerals be man-made? no
Can minerals be made from once living things? No
What are the three main types of rocks? Igneous, Sedimentary, and Metamorphic
What gives a rock it's texture? Grains
What three characteristics do geologists use to determine the rock? Color, Texture, and Mineral Composition
How do igneous rocks form? When molten material cools and hardens
If a mineral has high silica content, what color is it? The color would be light
What is the difference between extrusive and intrusive rock? Extrusive Rock- rock formed from lava that flowed out of a vent onto Earth's surface Intrusive Rock- rock formed from magma that hardened within Earth's interior
Two ways minerals form When molten rock cools and when water that has atoms dissolve elements in it, evaporate away. Solids are left behind and crystalize.
how does igneous rock form? Forms when magma cools
how does sedimentary rock form? When particles of rocks, plants, and animals are cemented together
How does metamorphic rock form?
What are five characteristics to tell if a rock is a mineral? Naturally Solid Crystal Structure unique composition and inorganic (cant be made from something once living
If you can see the grains easily on a rock, what type of grains does it have? Coarse
If you cannot see the grains easily on a rock, what type of grains does it have? Fine
Created by: ruby.mccook