Rock types
If a rock looks like a bunch of other rocks are inside of it, what kind of rock is it?
Sedimentary
Define Geology
The study of earth's surface and interior layers as well as how they change.
What is the inner layer of the earth?
Inner core
Two tectonic plates pushing together are called what?
Convergent boundary
Define Buoyancy
The ability or tendency to sink or float.
What rock often has crystals?
Igneous
The breaking down of rocks
Weathering
What layer gives us our magnetic field?
The outer core
Two tectonic plates pulling apart are called what
Divergent boundary
What motion does convection create
Circular
By applying heat and pressure you get what rock?
Metamorphic
Define earthquakes
A sudden shaking in the earth
What makes up the mantle?
Liquid magnesium and iron silicate
What is a transform boundary
Two tectonic plates rubbing against each other
What are the four things that cause erosion?
Water, wind, gravity, and ice
HOw are igneous rocks formed?
From cooling lava
Putting sediments in a new place
Deposition
Silicic rocks and basalt create what layer of the earth
The crust
What does a divergent boundary create
A rift valley, volcanoes, and earthquakes
Why do tectonic plates move?
They move because of convection. When the lower mantle heats up, it rises and loses density. It then cools at the top and falls
What may happen to a rock if it is chemically changed?
It could change colors, have bubbles, or appear burned. AKA a change to the chemical composition of a rock
Define the geologic time scale
Everything in Earth's history on one timeline.
What is the most dense layer of the earth and what is it made of?
The inner core and it is made of solid iron and nickel
What are the three types of possible convergent boundaries?
Land-Land, Ocean-Land, and Ocean-Ocean
How do we know about our layers of the earth if we haven't actually seen them.
We know about them because of seismic waves created by earthquakes.