4C & D Flashcards
What are the three main layers of the earth?
Crust, mantle, and core
True or false: the crust is made of rocks
True
Seismic waves move _______ as you go deeper into the crust
Faster
The Moho line is located at the _______ of the crust and separates the crust and the mantle
Bottom
When the speed of a wave starts to slow, this is called ___________
Discontinuity
Do waves speed up or slow down at the Moho line?
Slow down
The mantle is of 2 parts: the upper mantle and the _____________.
Asthenosphere
The upper mantle moves with the tectonic plates and is made of ________.
Rock
The upper mantle and crust combined are called the _____________.
Lithosphere
Below the upper mantle is the ______________
Asthenosphere
True or false: waves move slower in the asthenosphere
True
The asthenosphere is made of _____________ rocks
Melting
The mantle takes up _____% of the earth’s volume
84
The _______ takes up 15% of the earth’s volume and is located below the mantle
Core
True of false: the earth’s core is freezing
False, it is extraordinarily hot
The core has 2 parts: the outer part is liquid and the inner part is _______.
Solid
True or false: seismic waves DO NOT pass through the core
True
Geologists believe the core is 85% _________.
Iron
The earth’s ________ field is partially created by the core.
Magnetic
Any raw material that we use from our environment is a ___________ resource
Natural
___________ resources have an unlimited supply or are easily replenished
Renewable
Name 3 renewable resources
Water, sunlight, wind
Resources like coal and oil that CANNOT be replenished are called __________ resources
Nonrenewable
The effort to oversee and control the use of natural resources is called _________ ___________. (2 words)
Resource management
True or false: Resources that are consumed by humans, plants, and animals must be protected from pollutants
True
_______ waves have to do with earthquakes and sound waves moving through the earth
Seismic waves
