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18 Cards in this Set

  • Front
  • Back
What is a rock cycle?
The sequence of processes that change rocks from one type to another over long periods.
What is a mineral?
A solid nonliving substance that occurs naturally in rocks or in the ground.
What is an igneous rock?
A type of rock that forms from melted rock that cools and hardens.
What is the physical property, texture?
The way something feels.
What is a streak?
A physical property of a mineral.
How is a streak test performed?
When you rub a mineral across a surface, the mineral leaves a streak of powder.This colored streak can help scientists identify two minerals that look alike.
What is a rock?
a solid substance made of minerals
One way that rocks and minerals are similar.
Rock can be made of many minerals or of one mineral with different-sized grains.
What is a metamorphic rock?
rock that has changed from another type of rock. High temperature and pressure form this type of rock.
What is sedimentary rock?
A type of rock that forms when layers of sediment are pressed together.
What is sediment?
Sediment is pieces of rock that have been broken down and moved.
What are the three different groups in which rocks are classified?
1. Igneous
2.Sedimentary
3. Metamorphic
How are igneous rocks formed?
Igneous rocks are formed when melted rock cools and hardens.
How are sedimentary rocks formed?
Sedimentary rocks are formed when layers of sediment are pressed together.
How are metamorphic rocks formed?
Metamorphic rocks are formed when high temperature or pressure change a rock.
How can a streak test help identify a rock as being Gold or Pyrite?
Gold leaves a golden streak. Pyrite’s streak is greenish black.
What is one way that rocks and minerals are similar?
A rock is a mixture of one or more minerals.
What is one way that rocks and minerals are different?
Minerals are pure ad the color is usually the same. Rocks are made up of different minerals and have different colors.