Geo Final

25 July 2022
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110 test answers

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question
In addition to glacial ice, what other natural climate recorder is discussed in the SmartFigure?
answer
tree rings
question
The two main locations where ice cores are drilled are the Antarctic and __________ Ice Sheets.
answer
Greenland
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The temperature range of the past 7,000 years was __________ the temperature range of the preceding 30,000 years.
answer
more stable than
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From 400,000 to 50,000 years ago, the carbon dioxide levels fluctuated between ___________.
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180 and 280 ppm
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The most recent spike of CO2 (over 280 ppm) in the atmosphere correlates to __________.
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the onset of the Industrial Revolution
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More solar radiation is absorbed by Earth's surface than by __________.
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the atmosphere
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What is the term for the total radiation that is reflected by a surface?
answer
albedo
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Which of the following absorbs most incoming solar radiation?
answer
forest
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Light-colored surfaces __________ than dark-colored surfaces.
answer
have a higher albedo
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Of the 50% of incoming solar radiation that is not absorbed by Earth's surface, how much is lost to space by reflection and scattering?
answer
30%
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In general, which two factors determine the overall temperature of Earth's atmosphere?
answer
radiation coming into and radiation going out of Earth's atmosphere
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In general, what is the difference between the energy that comes into Earth from the Sun and the energy that Earth emits back to space?
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wavelength
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Which three gases are most important on Earth for inhibiting the release of longwave radiation back into space?
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water vapor, carbon dioxide, methane
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Part complete Which set of statements is correct?
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The greenhouse effect is a natural phenomenon. Human activity has increased the amount of greenhouse gases in the atmosphere over the past 250 years.
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Global warming is _________________.
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the warming of Earth's atmosphere primarily caused by the production of greenhouse gases due to human activity
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The Moon has __________ because all energy is reradiated back to space.
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a relatively low average surface temperature
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The Sun emits __________ radiation, but it is radiated back off of planetary bodies as __________ radiation.
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shortwave; longwave
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If the greenhouse effect ceased to exist on Earth, which of the following would result?
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The average surface temperature would drop to below the freezing temperature of water.
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Which of the following is true about Venus?
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The high abundance of greenhouse gases absorb most outgoing longwave radiation.
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The dense atmosphere of Venus is ________, causing most incoming solar radiation to be _________.
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light in color; reflected
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What two trends are commonly seen in modern monthly CO2 concentration charts?
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1) an up-and-down seasonal trend, and 2) overall increasing CO2 levels through time
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CO2 levels drop during spring and summer months because __________.
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photosynthetic organisms are absorbing CO2
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Which of the following is true when comparing the Amundsen-Scott South Pole station and Barrow, Alaska CO2 concentration curves?
answer
They show opposite seasonal curves.
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In the climate system diagram, modeling results show that observed changes in temperature closely align with __________.
answer
a combination of both natural and human effects
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The Vostok ice core curve shows CO2 concentrations over the last __________.
answer
400,000 years
question
What evidence is there that the O'Higgins Glacier is being affected by global warming?
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It has retreated nine miles in the past 100 years because of melting.
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How might global warming affect cities that rely on glacial runoff for their water supply?
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Cities may face long-term water shortages as the amount of water generated by glacial melt will decline as glaciers shrink.
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What is causing a decline in Antarctica's Chinstrap penguins?
answer
Populations of the penguin's major food source are declining because of melting sea ice.
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What has analysis of ice cores revealed about atmospheric greenhouse gas levels during the historic period?
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A sudden rise in greenhouse gas levels coincides with the start of the Industrial Revolution
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What impact would rising sea levels have on human migration?
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Rising sea levels would cause enormous migration as people move inland away from affected areas.
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How do the oceans contribute to maintaining a climate that is habitable for humans?
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Oceans absorb large quantities of carbon dioxide from the atmosphere.
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What is the primary cause of the nearly 20 percent increase in atmospheric carbon dioxide levels since the 1960s?
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Burning of fossil fuels
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How will increases in atmospheric carbon dioxide levels affect oceans?
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The oceans will become more acidic.
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Why are scientists doing research in an underwater lab in the Great Barrier Reef?
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To replicate future carbon dioxide levels and measure the changes in coral reef productivity, mortality and health
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What impact will increased carbon dioxide absorption by the oceans have on coral reefs?
answer
Reefs will degrade over time, ultimately resulting in large-scale mortality.
question
Below is an image of carbon dioxide levels in our atmosphere over the last 200 years or so. Are the carbon dioxide levels increasing, decreasing, or staying the same? week 14 hw
answer
Increasing
question
If there is a greenhouse gas more potent (potent meaning its more effective at trapping heat) than carbon dioxide, why do you think scientists focus on carbon dioxide and not mention other greenhouse gases?
answer
Scientist continuously focus on carbon dioxide because of how much carbon dioxide we as humans produce. The amount of carbon dioxide that we produce is what makes it such a pressing issue, not because it is the most harmful.
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Scientists use different techniques to measure carbon dioxide in our atmosphere. Explain one way a team of scientists could collect enough data to construct the graph below? week 14hw
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One way scientist can measure past climate is to look at ice cores from glaciers tree rings. These two things can help scientist study past climates.
question
The graph below shows how temperature has changed over the past 200 years or so. A temperature anomaly is how many degrees the temperature is warmer/colder than the normal recorded temperature. Note that this is in Celsius. Is the temperature anomaly increasing, decreasing, or staying the same?
answer
Increasing
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The industrial revolution began in the early 1900's and really took off in the 1920's. This included cars that require oil, coal burning trains, factories (which also burned coal), plastics, refineries, etc. week14hw
answer
The temperature anomaly began to increase during and after the industrial revolution.
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What are the three major greenhouse gases?
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Carbon dioxide Water vapor Methane
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Which greenhouse gas is 30 times more potent than carbon dioxide?
answer
Methane
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______ can be found in broad lowlands at the base of mountainous regions.
answer
Piedmont glaciers
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The upper boundary of the zone of wastage is ______.
answer
the snowline
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What size sediment can be transported by glaciers?
answer
All sediments sizes can be transported by glaciers.
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In glaciated terrain, waterfalls are associated with ______.
answer
hanging valleys
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Which of the following is a characteristic of glacial till?
answer
The particles are often scratched and polished.
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Which glacial depositional features can indicate the direction of glacial flow? CHOOSE ALL THAT APPLY.
answer
medial moraine, drumlin
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Which depositional glacial feature is composed of stratified drift containing sediment sizes ranging from clay to gravel?
answer
kame
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Which of the following changes is the result of glacier retreat following the last Ice Age?
answer
The Channeled Scablands formed as Lake Missoula drained.
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Which type of evidence would allow scientists to realize that more than one Ice Age existed in the recent geologic past?
answer
the presence of the remains of warm weather vegetation between layers of glacier till
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What is a possible cause for the transition from the last Ice Age to the current interglacial period?
answer
changes in Earth's orbit
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What is the name for an isolated boulder of unexpected rock type that has been transported by a glacier and stranded after the ice melts?
answer
till
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What causes a crevasse to form?
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When ice flows around a bend or over an obstacle, it is stretched and torn, causing large cracks to form.
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What causes streams that emerge from glaciers to be milk-colored?
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The presence of finely ground sediment called rock flour in the meltwater.
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What shape is a glacial trough?
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U-shaped
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Most modern glaciers are __________.
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retreating
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__________ are defined as a chain of glacial lakes where each lake flows into the next.
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Pater noster lakes
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What glacial feature is circled in Figure 1? mg ch18
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arête
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What glacial feature is circled in Figure 2? ch 18 mg
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horn
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What is the best way to describe the shape of a glacial valley?
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U-shaped
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Which type of glacial movement is circled in Figure 1? mg ch18
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basal sliding
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Which type of glacial movement will be responsible for the greatest amount of glacial flow?
answer
internal flow
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Explain why post A has moved farther than posts B and C. mg ch18
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Ice in the center of a glacier has the least friction with the surrounding bedrock and can flow faster.
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Which part of a glacier will see the build-up of ice and snow over the course of a full year?
answer
Zone of Accumulation
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How does a glacier lose ice through sublimation?
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Ice changes from solid to gas.
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Which of the following budget scenarios describes a glacial advance?
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More ice and snow accumulates than melts each year.
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During a glacial retreat, a glacier will flow _____ while the terminus moves _____.
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forward; backward
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Ice sheets are confined to valleys.
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False
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What do geologists term a body of glacial debris left behind by a retreating glacier? These can occur along the sides or at the ends of glaciers.
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Moraines
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Place the events in the order they must have occurred to form a hanging valley.
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1. Large glacier carves out a valley 2. A secondary, smaller glacier intersects the large valley 3. Both glaciers begin to melt 4. Water from the melting of the smaller glacier falls into the large valley creating a waterfall
question
Movement along the base of a glacier is termed...
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Basal sliding
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Judging by the shape of the valley shown below, was it shaped by a glacier? ch18
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No
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The upper portions of a glacier move due to plastic flow.
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False
question
f the wavelength of a set of waves is 20 feet long, how deep is the wave base?
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10 feet below the surface
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How shallow must the ocean floor be for waves to start to "feel bottom" for a wave set with a wavelength of 20 feet?
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Waves will "feel bottom" when the ocean floor is 10 feet below the surface.
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Which of the following distances represents one wavelength of the wave set drawn below? mg ch20
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A to C represents a wavelength.
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A set of waves are moving from east to west. Assuming the boat is in deep water, which of the following would describe the motion of a boat during the passage of these waves?
answer
The boat would move up and down in the water.
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Based on the diagram below, at what location would you expect the highest high tide to occur? mg ch20
answer
A
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Based on the diagram below, at which locations would you expect low tides to occur? mg ch20
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B,D
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Which of the following moon stages is correlated with Spring tides? mg ch 20
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full, empty
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Which of the following moon stages is correlated with Neap tides? mg ch20
answer
half and half
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Based on the moon phase shown below, select which special tide has occurred most recently and which special tide will occur next. mg ch20
answer
A spring tide will occur next. A neap tide has most recently occurred.
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What is an interference pattern?
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The wave pattern produced when two or more waves interact
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What results when two waves, in phase and with the same wavelength, interact?
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A wave with an amplitude that is the sum of the amplitudes of the initial two waves.
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What does the term "in phase" refer to?
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Waves in phase have identical wavelengths and are aligned peak-to-peak and trough-to-trough
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When will perfect constructive interference occur for waves that are in phase and moving at the same velocity?
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When waves with identical wavelengths interfere.
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When will perfect destructive interference occur?
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When two waves that are 180 degrees out-of-phase interfere.
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What occurs more often, pure destructive, pure constructive, or mixed interference?
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Mixed interference
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Which of the following are names for large ocean waves that can be created by constructive interference?
answer
Freak waves, Superwaves, Rogue waves
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Which of the following statements describe what happens to sediment when a longshore current meets a jetty?
answer
Sediment is eroded on the down-current side of the jetty because water is starved of sediment in this location., Sediment is deposited on the up-current side of the jetty because water moves slower in this location.
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Based on the diagram below, select which arrow best represents the direction of the longshore current. mg ch20
answer
arrow up and to the right
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Which of the following describes the general pattern of movement of sand on a shoreline?
answer
Net sand movement is parallel to the shore
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Which of the following statements describes how waves refract when approaching a shoreline that consists of a headland and an adjacent bay?
answer
Waves refract toward the headland because water is moving slower in front of the headland than in front of the bay.
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Which of the following statements about coastal erosion and deposition is true?
answer
Big boulders are found in the headland because erosion is occurring in this location
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If a topographic profile (a side view of the elevation) was drawn from point A to point B, what type of profile would you expect? mg ch20
answer
n shaped or mountain
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During which month are hurricanes most likely to occur on the east coast of the United States?
answer
September
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Which of the following describes the movement of air in a hurricane in the Northern Hemisphere?
answer
Air moves up from the surface in a counterclockwise direction.
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Where do hurricanes that hit the East Coast of the United States form? In which direction do they travel?
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Hurricanes form in the Atlantic Ocean north of the equator and move in a northwest direction.
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Which of the following statements about hurricanes is true?
answer
Hurricanes lose energy when moving over land.
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Is the longshore current traveling to the right or to the left in the image below? Think about where deposition and erosion are occurring. ch20 hw
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right
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Sand moves along the beach in a ________.
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zig zag pattern
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The arrangement of the sun, earth, and moon pictured below would produce a _______ tide. ch20 hw
answer
neap
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Waves can arrive parallel to shore due to what phenomenon?
answer
NOT Wave refraction
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What is the name of the man made structure seen in the image below? ch20 hw
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jetties
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What man made structure is the arrow pointing to in the image below? ch20 hw
answer
Breakwater
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Tides are waves that have very short wavelengths.
answer
False
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Every month or so we experience tides that are both higher and lower than the normal range. What do we call these tides?
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Not Neap tides
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Where do waves break along a coastal shore?
answer
Nearshore
question
People typically get seasick due to which ocean water phenomenon?
answer
Circular orbital motion