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lesson 1
minerals and rocks
Question | Answer |
---|---|
what is a mineral? | a naturally occurring substance, neither plant nor animal |
What is an igneous rock? | a "fire-made" rock formed from melted rock material |
What is sedimentary rock | A kind of rock formed when sand, mud, and pebbles at the bottom of rivers, lakes, and oceans pile up |
What is metamorphic rock? | A rock that has changed form through squeezing and heating |
How many kinds of rocks are there? | hundreds |
What are all rocks made from? | minerals |
What are some rocks made of? | many different materials |
What is an example of a rock made of many different materials | granite |
What is an example of a rock made of only one kind of mineral? | limestone |
How can minerals be compared | By color, texture, hardness, and a streak test |
How many ways can Earth's rocks form? | Three |
What are the three ways Earth's rocks can form? | Igneous rock is a "firemade" rock it is formed when melted rock cools and hardens. If a rock cools slowly, granite forms. If melted rock flows to the surface and cools quickly it forms rocks such as basalt |
What are some uses of rocks? | Make roads, walls, and buildings. Glass is made from sand which is tiny rock pieces. Soil is made from small pieces of rock. Salt is a mineral people need. Pencils contain a mineral called graphite. iron, gold, and silver are minerals |