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Earth's Interior
Earth's Interior
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Earth Science, Earth's Internal layers, ESRT page 10
Flashcards
18 cards
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Questions
18
Answers
1
Which part of the Earth is most likely a liquid zone?
inner core
mantle
crust
outer core
2
Which statement best explains why seismic waves change direction as they travel in the Earth?
The temp. of the Earth's interior decreases with depth
Seismic waves tend to travel in curved paths
Different parts of Earth's interior have different densities
The Earth is spherical
3
Which element is most abundant by mass in the Earth's crust?
oxygen
nitrogen
silicon
iron
4
What is the relationship b/t density, temperature, and pressure inside the earth?
As depth increases, density, temp, and pressure decrease.
depth increases, density & temp increase but pressure decrea
depth increases, density increases, but temp. & press. decr
As depth increases, density, temp. & pressure increase.
5
The density of Earth's crust is...
less than the outer core but greater than the mantle
greater than both the outer core and mantle
greater than the outer core but less than the mantle
less than both the outer core and mantle
6
To reach the mantle, it would make sense to drill through the oceanic crust because it is..
thinner than continental crust
more dense than continental crust
younger than continental crust
softer than continental crust
7
What is the inferred temperature at the boundary b/t Earth's stiffer mantle and outer core?
2,500°C
5,000°C
6,200°C
4,500°C
8
Which graph best represents the relationship b/t depth and density for the Earth's interior?
2.
3.
4.
1.
9
The temperature of rock located 1,000 kilometers below the Earth's surface is about...
200 C
2,800 C
2,100 C
3,200 C
10
Which conditions normally can be found in Earth's asthenosphere causing partial melting?
temp. = 1,000 °C, pressure = 10 million atm.
temp. = 6,000 °C, pressure = 4 million atm.
temp. = 2,000 °C, pressure = 0.1 million atm.
temp. = 3,500 °C, pressure = 0.5 million atm.
11
The Earth's core is believed to be composed of
aluminum and silicon
oxygen and silicon
iron and nickel
carbon and iron
12
How does the oceanic crust compare to the continental crust?
the oceanic crust is thinner and contains more basalt
the oceanic crust is thicker and contains less basalt
the oceanic crust is thinner and contains less basalt
the oceanic crust is thicker and contains more basalt
13
Which zone of Earth's interior has a melting point that is lower than the actual temperature?
inner core
outer core
mantle
crust
14
What is Earth's inferred interior pressure, in millions of atmospheres, at a depth of 3,500km?
2.8
5,500
1.9
6,500
15
The interface b/t the crust and mantle is deeper under continents than oceans because...
continental crust is thicker than oceanic
oceanic and continental crusts are about the same thickness
oceanic crust is thicker than continental crust
the interface varies in an unpredictable manner
16
Many scientists infer the composition of the Earth's core to be similar to the composition of
the mantle
Moon rocks
the oceanic crust
metallic meteorites
17
Which temperature is inferred to exist in Earth's plastic mantle?
2000 °C
5000 °C
6000 °C
3000 °C
18
Correctly order the Earth's interior layers in order of increasing average density
crust, mantle, inner core, outer core
crust, mantle, outer core, inner core
inner core, outer core, mantle, crust
outer core, inner core, mantle, crust
