Unit 3 Test Review Question Preview (ID: 48683)

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1. True or False: Slow movements of mantle rock called radiation transfer heat in the mantle.
a) true
b) false

2. True or False: Stress forces squeeze or pull the rock in the Earth's core.
a) true
b) false

3. Mid-ocean ridges are places where oceanic crust sinks back to the mantle.
a) true
b) false

Diverging boundaries pulling away from each other create a?
a) Volcano
b) trench
c) mountain
d) rift valley

5. When a liquid or gas is heated, the particles move faster and spread apart. What happens to the fluid's density as a result of this?
a) it increases
b) it decreases
c) it expands
d) it contracts

6. What three types of evidence provided support for the theory of sea-floor spreading?
a) drilling samples, fossils, land features
b) land features, fossils, climate change
c) molten material, drilling samples, magnetic stripes
d) magnetic stripes, climate change, subduction

Earth's outer core is composed of?
a) molten iron
b) granite rock
c) solid iron
d) basalt

8. Stress will build until an earthquake occurs if friction along a fault is
a) decreasing
b) high
c) low
d) changed to heat

9. To estimate the total energy released by an earthquake, a geologist should use the
a) mercalli scale
b) richter scale
c) epicenter scale
d) moment magnitude scale

Which step in a volcanic eruption occurs just before the volcano erupts?
a) magma collects in the magma chamber
b) lava hardens forming volcanic rock
c) expanding gases push magma through the pipe
d) the roof of the empty magma chamber collapses

Which volcanic feature forms when islands form in a slight curve?
a) caldera
b) island arc
c) hot spot
d) mid-ocean ridge

Magma pushes up from the mantle in the middle of the Atlantic Ocean. As a result, the Atlantic Ocean is growing by several centimeters each year. How else has this magma affected the Atlantic Ocean?
a) It has produced a flat, smooth ocean floor as the continents separate.
b) It has created a long, large mountain range below the ocean's surface.
c) It has produced volcanoes along the edges of the separated continents.
d) It has made the Atlantic Ocean waters much warmer than the Pacific Ocean waters.

How do active volcanoes located on islands create more land area on these islands?
a) Lava from volcanoes cools and hardens, forming more land.
b) Lava from volcanoes melts through old rocks, exposing more land.
c) Heat from volcanoes cause the ocean to evaporate, exposing more land.
d) Heat from volcanoes causes minerals in seawater to condense, forms more land.

About 150 million years ago, Pangea broke up into the individual continents we have today. What was MOST LIKELY to survive on the continent of Australia after it broke apart than before?
a) organisms that lived in fresh water
b) organisms that required a warm climate
c) organisms that hibernated for long periods of time
d) organisms that migrated

The inner core of Earth is made mostly of the metals
a) zinc and iron
b) iron and nickel
c) copper and mercury
d) gold and silver

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