Final Exam Review: 9th Grade Earth Science UPDATED Actual Exam Questions and CORRECT Answers
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Course
Earth Science
Institution
Earth Science
Final Exam Review: 9th Grade Earth
Science UPDATED Actual Exam Questions
and CORRECT Answers
Defined the lithosphere - CORRECT ANSWER- First crust and the upper mantle 100 km
thick
Define asthenosphere - CORRECT ANSWER- Bottom part of the mantle hotter flows
more
Describe the inner core ...
Final Exam Review: 9th Grade Earth
Science UPDATED Actual Exam Questions
and CORRECT Answers
Defined the lithosphere - CORRECT ANSWER✔✔- First crust and the upper mantle 100 km
thick
Define asthenosphere - CORRECT ANSWER✔✔- Bottom part of the mantle hotter flows
more
Describe the inner core - CORRECT ANSWER✔✔- Solid made of iron and nickel
Describe the outer core - CORRECT ANSWER✔✔- Liquid layer composed of iron and
nickel
Describe the Earth's magnetic field - CORRECT ANSWER✔✔- Magnetic field extends from
earth interior to where it meets the solar winds has two poles it is an electronic stream
produced by the outer core going around the inner core like a generator
How is the Earth's magnetic field generated - CORRECT ANSWER✔✔- Outer core going
around the inner core
Compare the properties of continental crust and oceanic crust - CORRECT ANSWER✔✔-
Oceanic crust is thinner denser and younger
Continental crust is thicker less dense and older
What type of rock makes of continental crust - CORRECT ANSWER✔✔- Granitic
composition
What type of rock makes up oceanic crust - CORRECT ANSWER✔✔- Basaltic composition
, List three uncertainties we have a of earth's interior - CORRECT ANSWER✔✔- 1. We have
never been to the mantle or core
2. All we have is indirect evidence know exact material 3. Boundary lines
How do seismic waves help us determine the make up of earths interior - CORRECT
ANSWER✔✔- There are points inside earth that S waves do not pass through, called shadow
zones revealing there has to be different layers. after earthquakes the shadow zone shows
there has to be some type of liquid center
Define seismic energy - CORRECT ANSWER✔✔- It wave of energy that is generated by an
earthquake or other earth vibration and that travels with in the earth or along its surface
Explain the uncertainties we have about earth magnetic field - CORRECT ANSWER✔✔- 1.
The Sun has a magnetic field but has no iron
2. The moon has a magnetic field no liquid core
3. we cannot go down 4. Our theory only explains how earth has a magnetic field
Compare the speed at which the three seismic waves travel - CORRECT ANSWER✔✔- P
waves are first, S waves are second, L waves are last
Describe P waves - CORRECT ANSWER✔✔- These waves are able to temporarily change
the volume of the material they travel through caused by push and pull action goes through
anything
Describe as waves include what they travel through - CORRECT ANSWER✔✔- These
waves shake particles at right angles to the direction of travel. Travel through solids not
liquids
Describe L waves - CORRECT ANSWER✔✔- Most damaging of all seismic waves. Travel
along the surface of Earth
Describe why many earthquakes do not have her below 650 km - CORRECT ANSWER✔✔-
Mantle gets too soft so it can't snap
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