eath layers
what is the correct order for the layers of the earth?
crust, mantle, outer core, and inner core.
what are sediments?
Sediment is solid material that settles at the bottom of a liquid
what creates tectonic plates?
continental and oceanic lithosphere
what is a volcano?
A volcano is an opening in the earth's crust through which lava, volcanic ash, and gases escape.
wha percent of the earths surface is covered in water?
71%
how many layers are in the earth?
3
how do sediments move from one place to another?
Sediment moves from one place to another through the process of erosion.
can tectonic plates form volcanoes?
yes, volcanoes form when one tectonic plate moves under another
when do volcanoes erupt
Volcanoes erupt when molten rock called magma rises to the surface.
what are underwater mountains that rise hundreds or thousands of feet from the seafloor?
Sea mounts
what layer of the earth lies below the crust and is the largest layer?
Mantle
how does sediments become sedimentary rocks?
If the sediment is buried deeply, it becomes compacted and cemented
what happens when two tectonic plates collide?
they form a convergent plate boundary
what type of volcano is the largest?
Shield Volcanoes
what is a seafloor mountain system formed by plate tectonics?
mid ocean ridge.
What is the deepest layer of the earth?
Inner Core
where do sediments come from?
Sediment forms when rocks and soil weather and erode.
how many tectonic plates are there?
7
do all continents have volcanoes?
yes
a large, flat, almost level area of the deep-ocean basin.
abyssal plain
what are the two types of earth's crust?
oceanic crust and continental crust
how far do tectonic plates move each year?
up to four inches per year.
what is the oldest volcano?
Etha it is about 350,000 years old
flattened seamounts caused by erosion from waves and currents.
guyots