Geologic Time
The longest division of geologic time is called
What is an eon?
These types of rocks form from the cooling and solidification of magma
What are igneous rocks?
This process breaks down rocks into smaller pieces.
What is weathering?
A naturally occurring inorganic object with a fixed chemical composition.
What is a mineral?
Fossils are found in this type of rock
What is sedimentary?
The period during which dinosaurs first appeared.
What is the Triassic period?
This cycle involves the transformation of existing rock types into different forms.
What is the rock cycle?
This type of weathering involves chemical changes within the minerals of the rocks.
What is chemical weathering?
The color of a mineral in its powdered form
What is a streak?
This scale measures the hardness of minerals
What is a MOHs scale
The principle that states that younger rocks are deposited on top of older rocks.
What is the law of Superposition?
This is the process by which sedimentary rocks are formed.
What is lithification?
The term for movement of sediment from one place to another.
What is erosion?
This term refers to when a mineral breaks along random irregular surfaces.
What is a fracture?
The two types of dating we learned about are
Absolute Dating and Relative Dating.
The era that we are currently living in.
What is the Cenozoic Era?
This type of rock is formed through heat and pressure
What is metamorphic rock?
Glaciers can contribute to erosion in this way:
What is erode land by moving and scraping rocks and soil as they advance and retreat?
This term refers to how a mineral reflects light.
What is luster?
This type of weathering is caused by the tree roots growing in rock cracks.
What is physical?
This dating method uses the decay of radioactive isotopes to determine the age of rocks.
What is radiometric dating?
Explain erosion in the rock cycle
What is the process where rocks and soil are removed from one location and transported to another by natural forces such as wind or water?
The process where sediments are laid down in new locations after being transported by erosion
What is deposition?
This gem is considered to be one of the hardest. It is a 10 on the MOHS scale.
What is a diamond?
This geologic principle states that rock layers are deposited horizontally
What is Original Horizontality?