Complete question:
Which of the following statements about sand dunes is true?
Choose one:
a. They are made of sandstone, a type of sedimentary rock.
b. In cross-sectional view, they show cross beds of sand.
c. Sand dunes that are covered with vegetation often erode more quickly than do non-vegetated dunes.
d. They can migrate downwind more than 2 km in a year.
Answer:
b. In cross-sectional view, they show cross beds of sand.
Explanation:
Winds can transport many different-sized particles of material from the ground through the process of erosion. These particles might travel many kilometers until they deposit somewhere. Regions with no vegetation have too much dust and grain-sized particles that move and crush each other, increasing erosion. This process is known as eolic erosion. Dunes are winds deposits, formations that are typical of deserts. Dunes are orientated according to the direction and speed of winds and the presence of loose material and vegetation. Strong winds transport sand until it collides with an object or obstacle, where it is deposited, originating a new dune.
Dunes are very dynamic formations that are constantly, being remodeled by the direction and strength of the winds. Dunes always have a soft slope and a sharp one. The soft slope faces the direction where the wind is coming from and is the product of the wind erosion on the same dune. The opposite sharp slope is protected from the wind and is the deposition place, where the wind losses strength and the carrying material falls, depositing in this side of the dune. Dunes are arranged as cross-bedding forms, reflecting the erosion and deposition pattern.
This is how erosion and deposition work together to form a dune.
Write THREE significance of atmosphere
Answer:
The atmosphere protects the Earth from solar radiation.
It traps heat, making Earth a comfortable temperature.
The oxygen within our atmosphere is essential for life.
What's a representation of something using objects ?
Answer:
physical model. A representation of something using objects.
a. Plates shift the continents around as they move, so Earth's surface is constantly changing. b. The contacts between plates are called passive margins. c. Plates may consist of both ocean floor and continental crust, but never just oceanic or continental crust. d. There are 120 major tectonic plates.
Answer:
a. True.
b. False.
c. True.
d. True.
Explanation:
A landform refers to a geomorphic or natural feature of the Earth's surface, which typically makes its terrain. Some examples of landforms on planet earth are mountain, plains, volcanoes, valley, hills and plateau.
Basically, the tectonic plates such as the oceanic and continental lithosphere interact in three (3) ways and these are; divergent, transform and convergent boundaries.
a. Plates shift the continents around as they move, so Earth's surface is constantly changing.
b. False: the contacts between plates are called passive margins. A passive margin is a region where continents have rifted apart and are then separated by a body of water such as an ocean.
c. True: plates may consist of both ocean floor and continental crust, but never just oceanic or continental crust.
d. True: there are 120 major tectonic plates.
What earthquake allowed researchers to develop the elastic rebound theory?
explain main reason the world faces shortage of fresh water. (Provide example of countries and reasons)
How do source of water gets polluted???
Answer:
The main point source of pollution to water is from sewage and waste water treatment, while for diffuse pollution, main sources are from farming and fossil fuel power plants (via the air).
Which of the following is not a place where hydrogen can be found on Earth?
A. Natural gas well
B. Water
C. Mine
D. Atmosphere
Answer:
D. Atmosphere
Answer:
D. Atmosphere
Explanation:
Hydrogen is found in great quantities on Earth combined with other elements, such as in water and hydrocarbons, but it is barely present in Earths atmosphere, which contains just 0.00005%.
the volcanoes of Iceland owe their existence to the mantle plume underlying the convergent-plate boundary on which they sit. b. rifting above a plume produced flood basalts such as the Columbia River Plateau of Washington and Oregon and the Deccan Plateau of India. c. the Ring of Fire bordering much of the Pacific Ocean is a long chain of transform plate-boundary volcanoes. d. active volcanoes in East Africa and extinct volcanoes of the Basin and Range Province of Nevada are the result of plate convergence.
Answer:
c. Volcanoes of Iceland owe their existence to the mantle plume
Which of the following best describes the kind of conflict between opposing
groups with different ideas on how society should be organized?
O A. Treaty or alliance
O B. Trade war
O C. Ideological
O D. Financial
How do you find the highest value on a contour map?
Answer:
On most topographic maps, index contour lines are generally darker and are marked with their elevations. Lighter contour lines do not have elevations but can be determined by counting up or down from the nearest index contour line and multiplying by the contour interval. The contour interval is stated on every topographic map and is usually located below the scale.
In the Northern (and Southern) Hemisphere, the ________________ cell is the continuous atmospheric convection cell that has an ascending limb near the equator and a descending limb near 30 degrees latitude. The columns of vertical movement are connected by south-moving winds at low altitudes and north-moving winds at high altitudes.
Answer:
Hadley.
Explanation:
In 1735, George Hadley proposed a model of the atmospheric circulation for planet Earth and it was referred to as the Hadley cell.
Hadley cell are low-latitude overturning circulations which comprises warm, moist air that rises into the atmosphere near the equator and air sinking at roughly 30 degrees latitude.
This ultimately implies that, the Hadley cell is the continuous atmospheric convection cell in the Northern and Southern Hemisphere which have an ascending limb near the equator and a descending limb near 30 degrees latitude.
Additionally, the south-moving winds and north-moving winds connect the columns of vertical movement at low altitudes and high altitudes respectively.
As required by the Texas law, please take a moment to answer following question before you can
move on to the next section.
Question 1 of 1
1. Almost
teens are killed by distracted or reckless driving
h
O 4.000
1,500
2.000
About 4,000 teens are killed by distracted or reckless driving every year in U.S.
What is a distracted driving?This refers to a non-driving activity that a driver engages in which has a potential to distract them form the driving task.
Some element of a distracted driving includes sending a text message, talking on phone, using a navigation system etc.
However, about 4,000 teens are killed by distracted or reckless driving every year in U.S.
Therefore, the Option A is correct.
Read more about distracted driving
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please help mee i will mark you brainliest
Answer:
(a)saudi arabia relies on desalination
(b)am not so sure but I think the UK
I hope this helps
Chemicals that evaporate from the soil of the tropics, ride the winds north thousands of miles, condense in the cold air, and fall on the Arctic in the form of toxic snow or rain illustrate the problem of Group of answer choices bioinvasion. permeability of international borders. greenwashing. deforestation.
Answer:
Following are the solution to the given question:
Explanation:
Boundary permeability is defined as the accessibility of communication at the geopolitical stage where the border is understood as a product of oppression formed by goods, capital, or thoughts on legal, physical, historic, or personal life. There are many various reasons why all these nations protect their borders: An invasion must be resisted. This is particularly true in areas when two or more countries have battled over that land for many decades.
name any two major desert region near the tropic of cancer
Explanation:
Much land on or near the Tropic of Cancer is part of the Sahara Desert, while to the east, the climate is torrid monsoonal with a short wet season from June to September, and very little rainfall for the rest of the year
How many millibars equivalent to one ATM unit of atmospheric pressure
Answer:
1 atm = 1,013.25 mbar , mb
