The rock cycle
What does the rock cycle explain?
How different types of rocks are formed
What are the three main events that change the landscape?
weather, erosion and deposition
what are the two ways igneous rocks can be classified?
Intusive and Extrusive
what are the two ways to classify a sedimentary rock?
well sorted or poorly sorted
What does this rock name mean?
changes forms
Where does most of the rock cycle take place?
Inside the earth
what is the result of weathering?
sediments or materials that have been broken down into smaller parts
What do igneous rocks never contain?
fossils
What are the steps to form a sedimentary rock?
1 weathering and erosion
2. deposition
3. compaction
4. cementation
How is this rock formed?
extreme heat and pressure
why is the process of the rock cycle important
without it we wouldn't have many different and changing rocks
What is deposition?
The process by which sediments are laid down.
what happens when an igneous rock cools quickly?
it has lot of holes and no crystal structure
What are found in a sedimentary rock that are found in no other rock?
Fossils
How do these rocks get pushed deeper into earth?
the movement of tectonic plates
What are the three types of rocks in the rock cycle
Igneous, sedimentary and metamorphic
what are the three types of weathering?
physical, chemical, and biological
What happens when a rock cools slowly
It has a definite crystal structure
How do we tell the difference between a sedimentary rock and metamorphic rock?
sedimentary have a grainy texture and straight lines all the way through the rock
What does eat and pressure eliminate in these rocks?
holes and fossils
How to Geologist tell the difference between rocks in the rock cycle?
colors, textures, and crystal formation
When you're walking along the beach and wind suddenly whips up sand, causing you to squint to try to keep the tiny particles out of your eyes, what are you experiencing?
Erosion
Pumice, Basalt and Obsidian are intrusive or extrusive?
extrusive
Why are the layers of a sedimentary rock so important to scientists?
They help scientists tell the age of fossils
What is an example of metamorphic rock?
shale, marble, schist, gneiss