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Earth’s Mantle Quiz
1) Kimberlite pipes are amazing because they are
a) Ancient, from when Earth was younger and hotter.
b) The most important source of diamonds.
c) Rock that comes from deep in the mantle.
d) All of these.
2) Scientists know that the mantle is made of the rock peridotite because
a) Of evidence from seismic waves, heat flow and meteorites.
b) It is commonly seen at Earth’s surface.
c) It is ultrafelsic, which fits the density of the mantle.
d) All of the above.
3) Heat that is transferred through rapid collision of atoms is conduction.
a) True
b) False
4) In heat transfer, heat flows from a cooler place to a warmer place.
a) True
b) False
5) Scientists know that the mantle is extremely hot because heat flows out of it.
a) True
b) False
6) Put in order of how convection currents in the mantle move.
I. The material that moved up cools and sinks back down into the mantle.
II. The bottom layer of the mantle material rises and spreads horizontally.
III. The mantle material near the core is heated.
IV. The bottom layer of the mantle becomes less dense.
a) IV, III, II, I
b) III, IV, II, I
c) I, II, III, IV
d) III, I, IV, II
7) This layer heats up the mantle.
a) Crust
b) Lithosphere
c) Asthenosphere
d) Core
8) The temperature of material near the surface __________ because __________.
a) Cools; it is no longer being heated from below
b) Cools; it comes into contact with rain, snow and ice.
c) Warms; solar radiation.
d) Warms; volcanic activity heats it up.
9) Which of the following is not true about ultramafic rocks?
a) They are made of iron- and magnesium-rich silicate minerals.
b) They are denser than other rocks.
c) Basalt is the most common, since it makes up most of the mantle.
d) They are uncommon at Earth’s surface.
10) Peridotite is abundant at Earth’s surface.
a) True
b) False