Science ch.8

Meaning of Geology

• study of the universe

• study of the ground

• study of earth

Erosion meaning

• blah blaj

• the process of water, ice, and wind breaks down rocks

• the process of rocks, gas, and fire breaks down rocks

3 types of rocks

• igneous

• mesozoic

• metamorphic

• cambrian

• sedimentary

what is a metamorphic rock?

• a type of rock that forms from the cooling of molten rock at or below the surface

• at type of rock that formed of hardened layers of sediments

• a type of rock that forms from an existing rock that is changed by heat, pressure, or chemical reactions

What is and igneous rock

• a type of rock that forms from an existing rock that is changed by heat, pressure, or chemical reactions

• at type of rock that formed of hardened layers of sediments

• a type of rock that forms from the cooling of molten rock at or below the surface

what is a sedimentary rock?

• a type of rock that forms from the cooling of molten rock at or below the surface

• at type of rock that formed of hardened layers of sediments

• a type of rock that forms from an existing rock that is changed by heat, pressure, or chemical reactions

What is relative age?

• the age of a rock given as the number of years since the rock formed

• the age of a rock compared to the ages of rock layers

what is absolute age

• 
  the age of a rock compared to the ages of rock layers

• the age of a rock given as the number of years since the rock formed

what is the law of superposition used for?

• determining the absolute age of rocks

• determining the relative age of rocks

What does extrusion mean?

• an igneous rock layer formed when lava flows onto Earth's surface and hardens.

• an sedimentary rock layer formed when lava flows onto Earth's surface and hardens.

• an metamorphic rock layer formed when lava flows onto Earth's surface and hardens.