Download Name Date Period Number ______ Parent Signature Earth Test

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Earth Test Review Answer Key
2017
Answer the following questions on your own paper
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List the elements that make up Earth’s atmosphere from most to least abundant. N, O
List the elements that make up living things from most to least abundant. C, H, O
List the elements that make up the ocean from most to least abundant. H, O, Na, Cl
List the elements that make up solid earth from most to least abundant. O, Fe, Si, Al
List the layers of the Earth from the inner core out. Inner core, outer core, mantle, lithosphere
Which of Earth’s layers is the thickest? How thick is it? Mantle – 2900 Km thick
Where in Earth’s mantle are convection currents located? Asthenosphere
Where is the lithosphere located? What does it include? The lithosphere is just above the
asthenosphere and it includes the crust and the 1st 100 km of the upper mantle
Where is the asthenosphere located? What does it include? Just below the lithosphere – middle
mantle – includes convection currents
What state of matter is the asthenosphere? Explain why. Asthenosphere is semi-solid because
of the heat and pressure on that layer of the mantle
What are Earth’s inner and outer core made of? Fe and Ni
What state of matter is the inner core? Explain why. The inner core is solid because of the heat
and pressure exerted on it.
What state of matter is the outer core? Explain why. Liquid because of the pressure and
temperature exerted it.
Explain why Earth has a magnetic field. Because the liquid outer core rotates around the solid
inner core as the Earth rotates on its axis
Which 2 layers are responsible for Earth’s magnetic field? The inner and outer core
The Earth is made up of 2 different types of crust. What are they and how thick are they?
Continental crust is up to 40 km thick and the oceanic crust is less than 10 Km thick
Where is Earth’s mesosphere? The mesosphere is the mantle
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18. Label the plate map below – use
See back for additional questions
19. Label the Layers of Earth on the diagram provided. Include thickness and state of matter for
each. Answer on your own paper
Name _______________ Date __________________ Period __________________ Number __________
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