Three types if rock Flashcards
What is a mineral
A chemical element or compund
Give examples or minerals
Silicon dioxide
Sodium chloride
What is a rock
A mixture of different minerals
Why do rocks have different structures
It depends on the positions of their grains and crystals
How do we recognise sedimentary rock
Layers: different layers of rock
Fossils: animal/plant fossils
What is weathering
When rocks are broken down and washed away due to water or wind
What is compaction
When water is squeezed out of the sea floor rocks. Over millions of years, they bond creating sedimentary rock
Which layer of a sedimentary rock is the oldest
The bottom layer
Give an example of physical weathering
Freeze thaw
Onion skin peeling
Give an example of chemical weathering
Acid rain
Give ab example of biological weathering
Human/animals walking on rock
Plants growing through rock
Give the flow chart of sedimentary rock creation
Weathering Transported Deposition Compaction Cementation
Whats the difference between lava and magma
Magma becomes lava when it reaches the earth’s surface
How is igneous rock formed
Magma or lava cools down after an eruption and forms igneous rock
What is metamorphic rock
Different rocks that have morphed to become one
