Chapter 7

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Georges Tchagah

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Chapter 7


Froggy Jumps Chapter 7Versión en línea Earth Science por Georges Tchagah 1 What is a glacier? a A glacier is a thick ice mass that moves slowly over theland surface. b A large body of saltwater that covers most of the Earth's surface. c A vast, hot desert region characterized by sand dunes and minimal rainfall. 2 What is an Ice age a A time when all the oceans on Earth freeze over completely. b An ice age is a period of time when much of Earth’s land is covered in glaciers. c A period of intense global warming across all continents. 3 What is the snowline a The highest point on a mountain where snow can be found. b The average amount of snowfall an area receives in a year. c The snowline is the lowest elevation in a particular area thatremains covered in snow all year. 4 What are the two types of glaciers a Icebergs b Valley glaciers and ice sheets c Sea Ice 5 Two ways glaciers flow a Plastic flow and basal slip b Wind c Runoff 6 Define glacial budget a The amount of money spent on studying glaciers b The total volume of ice in a glacier at any given time c The glacial budget is the balance or lack of balance between the top and bottom of the glacier 7 Name one landscape feature glaciers produce a Horns b V shaped valleys c Deltas 8 What is Till a Till is material deposited directly by the glacier b Material deposited by running water c Till is finely ground rock powder carried by wind 9 What are moraines a When glaciers melt, they leave layers or ridges of till called moraines b Large, moving masses of ice that carve out valleys c Nice warm jumbalaya 10 What are plucking and abrasion, and how do they erode land? a A glacier widens, deepens, and straightens the valley b Wind erosion removes the valley sides c Lava fills the valley and reshapes it 11 How are humid regions different from desert regions in terms of soil and vegetation? a Humid regions have thick soils and lots of plants; deserts do not b Deserts have more plants than humid regions c Both regions have the same soil and vegetation 12 Why is mechanical weathering more common in deserts than chemical weathering? a Deserts have too many plants b There is little moisture, so rocks break physically instead of chemically c Chemical weathering happens faster without water 13 What is a desert stream, and why are most desert streams temporary? a A stream that flows only after rain because water is scarce b A stream that flows year-round from glaciers c A stream that flows only underground 14 What is interior drainage, and why do many desert streams not reach the ocean? a Water stays within basins and evaporates before reaching the ocean b Streams freeze before reaching the ocean c Rivers flow backward toward mountains 15 How do alluvial fans form at the base of desert mountains? a Water slows down and drops sediment when it leaves steep canyons b Wind piles sand into cones c Lava spreads out at mountain bases 16 What is a playa lake, and what happens after the water disappears? a A temporary lake that dries into a flat playa b A deep permanent desert lake c A saltwater ocean 17 Why are rivers like the Colorado River able to flow through deserts permanently? a They start in well-watered areas with lots of water b They gain water from desert rainstorms c They are fed by underground oceans 18 Why are floods in deserts usually short but very intense? a Dry soil and little vegetation cause rapid runoff b Desert rivers are fed by glaciers c Groundwater rises slowly over weeks 19 Why is sand in deserts easily eroded and transported? a Ice cements the sand together b Sand is heavier than most rocks c There is little vegetation to hold it in place 20 What usually happens to desert streams after heavy rainfall? a They become permanent rivers b They flow briefly, then dry up again c They freeze and turn into glaciers 21 What is deflation, and what particles are most easily removed by wind? a Wind lifting clay and silt from the ground b Wind melting ice c Wind breaking rocks chemically 22 What is desert pavement, and how does it protect the land? a A layer of pebbles that prevents further wind erosion b A man-made road in deserts c A hardened salt crust 23 How does abrasion work, and why does it mostly happen near the ground? a Wind-blown sand scrapes rocks, and sand stays low b Rain dissolves rock at high elevations c Ice freezes and cracks rock 24 What is loess, and where is it commonly found? a Wind-blown silt found in places like China b Lava rock near volcanoes c Glacial ice deposits 25 What factors determine the shape of sand dunes? a Wind, sand supply, and vegetation b Ocean tides c Earthquakes and volcanoes 26 What are barchan dunes, and how do they form? a Star-shaped dunes formed by changing winds b Crescent-shaped dunes with little vegetation and limited sand c Long straight dunes formed with lots of plants 27 How are transverse dunes different from longitudinal dunes? a Transverse dunes are perpendicular to wind; longitudinal dunes are parallel b Transverse dunes form underwater c Longitudinal dunes only form in forests 28 Why do parabolic dunes have their tips pointing into the wind? a Vegetation anchors the arms while the center moves b Gravity pulls them backward c Water erosion shapes them 29 What causes star dunes to form, and where are they found? a One steady wind near beaches b Melting glaciers in polar regions c Changing wind directions in places like the Sahara 30 What type of sediment is most commonly lifted by wind during deflation? a Clay and silt b Large boulders c Bedrock layers

Chapter 7

Froggy Jumps

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Quiz de Culpa mía película

Froggy Jumps

Chapter 7Versión en línea

por Georges Tchagah

What is a glacier?

What is an Ice age

What is the snowline

What are the two types of glaciers

Two ways glaciers flow

Define glacial budget

Name one landscape feature glaciers produce

What is Till

What are moraines

What are plucking and abrasion, and how do they erode land?

How are humid regions different from desert regions in terms of soil and vegetation?

Why is mechanical weathering more common in deserts than chemical weathering?

What is a desert stream, and why are most desert streams temporary?

What is interior drainage, and why do many desert streams not reach the ocean?

How do alluvial fans form at the base of desert mountains?

What is a playa lake, and what happens after the water disappears?

Why are rivers like the Colorado River able to flow through deserts permanently?

Why are floods in deserts usually short but very intense?

Why is sand in deserts easily eroded and transported?

What usually happens to desert streams after heavy rainfall?

What is deflation, and what particles are most easily removed by wind?

What is desert pavement, and how does it protect the land?

How does abrasion work, and why does it mostly happen near the ground?

What is loess, and where is it commonly found?

What factors determine the shape of sand dunes?

What are barchan dunes, and how do they form?

How are transverse dunes different from longitudinal dunes?

Why do parabolic dunes have their tips pointing into the wind?

What causes star dunes to form, and where are they found?

What type of sediment is most commonly lifted by wind during deflation?