Igneous Rocks
What are the two types of igneous rocks?
Extrusive and intrusive
What are sedimentary rocks made of?
Sediments
What two things cause the formation of metamorphic rocks?
Heat and pressure
Igneous rocks become sediments by the process of:
Weathering and erosion
What is the hardest substance known?
Diamond
How are igneous rocks formed?
Which two processes allow sedimentary rocks to form?
Compaction and cementation
What is the formation of metamorphic rocks called?
Metamorphism
What is formed when rocks become liquid after being heated?
Magma
True or false: When water is moving quickly, it can carry heavier sediments.
True
What determines the size of crystals in an igneous rock?
The amount of time it has to cool
What is weathering and erosion?
break down of rocks into sediments and the transportation of sediments.
What type of rocks can become metamorphic rocks?
Any type of rock
What is the process in which broken rock material is transported from one place to another?
Erosion
What is the name given to the property of rock that describes its colour when it is ground into a powder?
Streak
Which would have larger crystals - extrusive or intrusive igneous rocks?
Intrusive igneous rocks
What do many sedimentary rocks contain?
Fossils
Heat and pressure can be increased by movements in the Earth's crust, which is made up of sections called what?
Tectonic plates
Name the three types of weathering.
Physical, chemical and biological
What is the name of the tool used for measuring the hardness of rocks?
Moh's Hardness Scale
Name an igneous rock in which you cannot see crystals, which is also known as volcanic glass.
Obsidian
Name the organic sedimentary rock that is formed from dead plant matter in water after millions of years and tonnes of pressure.
Coal
A type of metamorphic rock made from carbon at temperatures of over 1000 degrees Celsius.
Diamond
What happens to the temperature of rocks as you move towards the centre of the Earth?
What are the building blocks of rocks called?
Minerals