What does the diagram show?

Magma rising up through a rift valley at a divergent boundary

How does the following map best support the theory of plate tectonics?

Points B & C appear to have once been next to each other but drifted apart

Which statement best summarizes the source of most of the oxygen present in the atmosphere?

Cyanobacteria produced and emitted oxygen as a result of photosynthesis

Which evidence supports Wegener's continental drift hypothesis?

Similar fossils found on opposite sides of the ocean

The Himalayan Mountains are being formed as

2 tectonic plates are colliding

In which direction might ridge push happen in the following diagram?

From the divergent boundary toward the convergent boundary

How do scientists divide Earth's core into an outer core and inner core?

They exist in different states of matter

If you could bore through Earth's interior what cause would notice as passed from the asthenosphere to mesophere

They would detect physical change from partly molten rock to soli rock

Which statement best explains how a major volcanic eruption can change climate?

Heat transfer from EArths interior to atmosphere will increase temperature, Ash in atmosphere can block sun decreasing temps on Earth for several years

Following diagram shows band of ocean9c crust at a mid ocean ridge. Which of the following is correct?

Bands A and D have the same magnetic polarity as do B and C

Geologist discovers deposits of the same glacial sediment at locations A and C on the map. How support plate tectonics

Sediment was deposited at B when was joined to C the deposits went with it

What process drives mantel convection?

Transfer of thermal energy from core to the surface

Which of the following predictions about the crust at location A is most likely correct?

Crust is between 1 day and 130 million years old

Why is it unlikely that Earths early atmosphere was formed primarily by photosynthetic organisms?

Early atmosphere was CO2 and photosynthesis added oxygen

According to the theory of plate tectonics, which conclusion about the following diagram is most likely correct?

Bands A and D are older than B and C

Why do scientists divide earth's core into an outer and inner core?

They exist in different states of matter

Which statement best explains why Earth's lithosphere is broken into tectonic plates?

Earthquakes form cracks in lithosphere over time creating new plates

Does magnetic north always point in the same direction as geographic north?

No, magnetic north isnt located at geographic north

Why does the amount of oceanic crust in a tectonic plate change over time?

Oceanic crust is continually recycled into the mantle

Earth's lithosphere is gradually shrinking as crust is destroyed at subduction zones. What is wrong with this statement

Lithosphere is not shrinking new curst is being made at mid oceanic ridges

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Environmental Science Unit 2 Benchmark

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Questions 27

Answers

1
Where in this diagram is seafloor spreading happening?
Both
B
A
Neither
2
What does the diagram show?
Magma rising up through a rift valley at a divergent boundary
Symmetrical bands of alternating magnetic polarity
Symmetrical chains of folded mountains either side of a convergent boundary
magma rising up from a subduction zone at a convergent boundary
3
How does the following map best support the theory of plate tectonics?
Points B and C are located on continents that are roughly the same size
Points B & C appear to have once been next to each other but drifted apart
Point A is located on acontinent that is larger than the one D is located.
Points A, B, C, D have not changed their position on the globe
4
Which statement best summarizes the source of most of the oxygen present in the atmosphere?
Oxygen was released deep in Earth's interior through volcanoic eruptions
Cyanobacteria produced and emitted oxygen as a result of photosynthesis
Animals produced and emitted oxygen as a product of cellular respiration
Privative plants produced oxygen as a product of photosynthesis
5
Which evidence supports Wegener's continental drift hypothesis?
Buildup of sediment along continental margins
Meteors impact craters in continental crust
Similar fossils found on opposite sides of the ocean
All of the above
6
The Himalayan Mountains are being formed as
2 tectonic plates are colliding
2 tectonic plates are sliding horizontally past each other
Continental plate is subducting beneath an oceanic plate
2 tectonic plates move apart
7
To which of the following do geologists primarily attribute the evolution of complete life forms on the planet?
Increase in atmospheric oxgyen
Increase is atmospheric carbon dioxide
Formation of oceans
Formation of solid crust
8
In which direction might ridge push happen in the following diagram?
From the convergent boundary to the divergent boundary
From the convergent boundary away from the divergent boundary
All of the above
From the divergent boundary toward the convergent boundary
9
How do scientists divide Earth's core into an outer core and inner core?
They have a different chemica composition
They are divided by a layer of partly molten materials called the mesophere
They were formed in different geological eras
They exist in different states of matter
10
What caused Earth's interior to separate into distinct layers?
All the above
Density differences
Composition
Temperature difference
11
If you could bore through Earth's interior what cause would notice as passed from the asthenosphere to mesophere
Would detect change from solid rock to partly molten rock
detect a change in composition from magnesium rich to oxygen rich minerals
Would detect a change from iron rich minerals to silica rich minerals
They would detect physical change from partly molten rock to soli rock
12
Which statement best explains how a major volcanic eruption can change climate?
Particulate matter in atmosphere can trap heat and increase temperatures
Heat from Earth's interior lost to space can decrease temperatures
Heat transfer from EArths interior to atmosphere will increase temperature
Ash in atmosphere can block sun decreasing temps on Earth for several years
13
Following diagram shows band of ocean9c crust at a mid ocean ridge. Which of the following is correct?
Bands A and D have the same magnetic polarity as do B and C
Bands A, B, C, d have the same magnetic polarity
Bands A, B, C, D all have a different magnetic polarity
Bands A and B have the same magnetic polarity as do C and D
14
Geologist discovers deposits of the same glacial sediment at locations A and C on the map. How support plate tectonics
Sediment was deposited at B when was joined to C the deposits went with it
Points B and C moving together, will form a single glacial sediment
from the mantle & ocean currents carried them to B & C at different times
They do not support plate tectonics
15
How does fossil evidence support Wegner's hypothesis of continental drift?
Similar fossils found along continental margins appear to join together
Similar fossils of dinosaurs are found on continents separated by oceans
Fossil found in areas where present day climate could not have supported
All of the above
16
What process drives mantel convection?
Transfer of thermal energy from core to the surface
Transfer of electromagnetic energy inward from Earth's surface
Transfer of thermal energy from earth surface to the core
Transfer of radioactive outwards from Earth's interior
17
Which of the following predictions about the crust at location A is most likely correct?
Crust is never more than 100 years old
The crust is 4.56 billion years old
Crust is between 1 day and 130 million years old
Crust is between 1 billion an 3.85 billion years old
18
What caused oxygen levels to increase the early atmosphere?
Plants
All of the above
Animals
Bacteria
19
Why is it unlikely that Earths early atmosphere was formed primarily by photosynthetic organisms?
Early atmosphere was nitrogen and photosynthesis released oxygen
Early atmosphere had a lot of oxygen & photosynthesis releases CO2
Planet would have become colder
Early atmosphere was CO2 and photosynthesis added oxygen
20
According to the theory of plate tectonics, which conclusion about the following diagram is most likely correct?
Bands A and D are younger than B and C
Bands A and B are younger than C and D
Bands A and B are older than C and D
Bands A and D are older than B and C
21
Why do scientists divide earth's core into an outer and inner core?
They exist in different states of matter
They are divided by a layer of partly molten rock called the mesophere
They were formed in different geological eras
They have a different chemiical composition
22
Which statement best explains why Earth's lithosphere is broken into tectonic plates?
Lithosphere cracks and deforms under weight of the continents
Earthquakes form cracks in lithosphere that grow large creating new plates
Earthquakes form cracks in lithosphere over time creating new plates
After the Earth was formed, the lithosphere cooled causing it to crack
23
Does magnetic north always point in the same direction as geographic north?
No, Earth's magnetic field is always spinning
No, magnetic north isnt located at geographic north
Yes, always pointed towards north pole
No, it points towards the south pole
24
One can conclude that Earth's internal layers resulted from which mechanism?
Differentiation
Decay of radioactive isotopes
Bombardmen
Accretion
25
Why does the amount of oceanic crust in a tectonic plate change over time?
Oceanic crust is continually recycled into the mantle
Weight of continents presses oceanic crust into the asthenosphere
Erosion from continental crust continually forms new oceanic crust
Amount of oceanic crust in a tectonic plate does not change over time
26
2 bands of rock on the side of a midoceanic ridge. Band A is 5km from the ridge, and band B is 50km. Which is true
Band A is older than Band B
Band B is igneous rock and Band A is sedimentary rock
Band A is igneous rock and B is sedimentary rock
Band B is older than Band A
27
Earth's lithosphere is gradually shrinking as crust is destroyed at subduction zones. What is wrong with this statement
Lithosphere is not shrinking bc crust is not destroyed it sticks to mantle
Lithosphere is not shrinking new curst is being made at mid oceanic ridges
It is a correct statement
It is growing more crust is created at subduction zones than destroyed

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