Igneous Rock
How is igneous rock formed?
By molten rock pushing through the Earth's crust and then hardening.
How are sedimentary rocks formed?
Sedimentary rocks form when sediment hardens at the bottom of rivers and oceans.
How are metamorphic rocks formed?
They have changed form by intense heat, pressure, or hot fluids within the Earth.
Minerals are inorganic, what does that mean?
Naturally occurring
True or False. Rocks never Change.
False - Rocks are continually changing.
What does air bubbles do to the weight of igneous rock?
Makes it lighter
What is sediment?
Sediment is tiny pieces of rock.
What were metamorphic rock before they changed?
They were igneous or sedimentary rock.
True or false, a liquid is a mineral?
False, a mineral is solid.
What is weathering?
Is the process of wearing away or changing the appearance of something.
Name a type of igneous rock.
Dolerite, granite, pumice, basalt
How does rock get broken down into smaller pieces?
washed away by water
blown by wind
What does metamorphic mean?
To change form.
What are some tests you can do on a mineral?
hardness, streak, cleavage
What is erosion.
Is what happens when wind, water or ice move the small pieces of rocks that are changed or broken apart by weathering.
What does igne mean?
Fire
How many years does it take for sedimentary rock to form?
Millions of years
True or False. Metamorphic rocks are melted rocks.
False. Metamorphic rocks did not melt, but became smaller and denser as they change form.
What is the hardest mineral?
diamond
True or False - The Rock cycle happens twice a year.
False - The Rock cycle never stops.
What is the difference between extrusive and intrusive igneous rocks?
Extrusive - forms at the Earth's surface
Intrusive - forms inside the Earth's surface
Name a sedimentary rock.
sandstone, limestone
Name a metamorphic rock.
gneiss, marble, slate
What is the highest number on the Moh's scale of Hardness.
10
What are extrusive Igneous rocks?
They are igneous rocks that form at the Earth's surface.