Which of the following is considered chemical weathering?


A. A rock splits because tree roots wedged into a crack.

B. Water freezes in a crack in the rock and expands, splitting the rock.

C. A limestone rock dissolves due to acid rain.

D. A rock broke into chunks after being tossed around in a river.

D. A rock broke into chunks after being tossed around in a river  is considered chemical weathering. In geology, chemical weathering is the process by which rocks are gradually broken down through chemical interactions, frequently producing a totally distinct substance.

What are chemical weathering and state three chemicals produce weathering?

Water and minerals interact in this process, causing a variety of chemical reactions that change the rocks. As the mineralogy of the rock adapts to the near-surface environment, chemical weathering is a gradual and continual process. The main minerals that made up the rock's foundation give rise to secondary minerals. The two chemical reactions that happen most frequently in this are oxidation and hydrolysis.

Oxidation, hydrolysis, and carbonation are the primary chemical reactions involved in chemical weathering. Hydrolysis is a reaction with water, carbonation is a reaction with CO2 to generate a carbonate, and oxidation is a reaction with oxygen to form an oxide. In order to alter the composition of rocks, chemical weathering requires the interaction of rock with mineral solutions (chemicals).

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What are areas called where the supply and demand for water are relatively even?

Which of the following best describes the climate types of the Middle East?
A.
The entire region is arid desert.
B.
The majority of the region is semiarid; there are some areas of arid desert, but few Mediterranean climate zones.
C.
Most of the region is arid desert, but there are also semiarid, Mediterranean, and highland climate zones.
D.
Most of the region has a Mediterranean climate; however, there are arid deserts along the coasts.

Explain how a country's youth dependency ratio may change if its
population grows mainly through natural change is negative.

the Earth orbit around the sun is in which shape​

In one-point perspective, parallel lines converge at a single ________ on the horizon.

Explanation why Europe and Asia are two continents, please

which idea can be inferred from the charleston earthquake? (1 point) a aftershocks are sometimes more destructive than the original earthquake. b most authorities do not believe the reports of multiple aftershocks in jacksonville. c strong earthquakes can cause aftershocks that may continue to happen for years. d the bigger the earthquake, the more likely there will be multiple aftershocks.

Which of the following locations are in the temperate zone?
a.
Greenland and Northern Canada
b.
Tennessee and Kentucky
c.
Arizona and Nevada
d.
Florida and the Caribbean

South-facing slopes are warmer in nepal.
​

Which of the following describes a lunar eclipse?
1-The Moon's shadow is on Earth.
2-Earth's shadow is on the Sun.
3-Earth's shadow is on the Moon.
4-The Moon's shadow is on the Sun.

PLAESE HURRY!!!!!!!!!!! Which of the following were reasons for the Soviet Union’s collapse?


i. Satellite nations declared independence.

ii. The Soviet Union could not compete economically with the West.

iii. Soviet citizens demanded political and economic reforms.

iv. The United States beat the Soviet Union in a violent battle at Stalingrad.


A.

i. and ii. only

B.

i. and iv. only

C.

iii. and iv. only

D.

i., ii., and iii.

hlavne mesto slovenska

What type of rock is Split Apple Rock made of?

I need help thank you ^^

What latitudes have moist air rising?​

What is the purpose of the establishment clause?

to give citizens the right to form religious groups
to stop government from supporting one religion
to give government power to choose a state religion
to stop citizens from practicing religion in public

List the three fundamental economic systems, how each system works, how does it answer the three economic questions, where is this economic system located in the world today, and what is a mixed economy?

how can economic growth can have harmful impacts on the environment?

According to the article how can we reduce water scarcity? the essays underneath.
About two-thirds of the world’s population faces water scarcity for at least one month during the year. The growing risk of worldwide water shortages is worse than scientists previously thought, according to a new study.

About 66 percent, which is 4 billion people, of the world’s population lives without sufficient access to fresh water for at least one month of the year, according to a new paper published Friday in the journal Science Advances (Links to an external site.).

Previous studies calculated a lower number, estimating that between 1.7 and 3.1 billion people lived with moderate to severe water scarcity for at least a month out of the year.

Scientists, led by Dr. Arjen Hoekstra (Links to an external site.) of the Netherlands’ University of Twente, used a computer model that is both more precise and comprehensive than previous studies have used to analyze how widespread water scarcity is across the globe. Their model considers multiple variables including: climate records, population density, irrigation and industry.

“Up to now, this type of research concentrated solely on the scarcity of water on an annual basis, and had only been carried out in the largest river basins,” Hoekstra said (Links to an external site.) in a statement. “That paints a more rosy and misleading picture, because water scarcity occurs during the dry period of the year.”

“The fact that the scarcity of water is being regarded as a global problem is confirmed by our research,” Hoekstra added. “For some time now, the World Economic Forum has placed the world water crisis in the top three of global problems, alongside climate change and terrorism.”

Severe water scarcity happens when consumption is twice as high as available resources, according to the study’s researchers. Consequently, half of those suffering from water scarcity are in the world’s two most populous countries — India and China — where demand is high.

High-scarcity levels are also widespread in areas with significant irrigated agriculture (like the Great Plains in the United States) or low natural availability of fresh water (like the Arabian Desert) where populations are also relatively dense, according to the study. Similar patterns exist in the south and western United States where heavily populated states like California have been in a drought for years. (Links to an external site.)

The consequences of water scarcity can result in economic losses due to crop failure, limited food availability and poor business viability, and can threaten environmental biodiversity. When faced with scarcity, areas in need of water often resort to pumping groundwater (Links to an external site.), which can permanently deplete the supply.

Water shortages have also precipitated or heightened the potential (Links to an external site.) for global conflicts in places like the Middle East and Africa.

“Freshwater scarcity is a major risk to the global economy (Links to an external site.), affecting four billion people directly,” Hoekstra told The New York Times. “But since the remaining people in the world receive part of their food from the affected areas, it involves us all.”

Despite the grim findings, the study recommends ways to reduce scarcity, such as increasing reliance on rain-fed rather than irrigated agriculture, improving the efficiency of water usage and — perhaps the most challenging for humans — sharing what’s available. The researchers point out that for these solutions to be effective, governments, corporations and investors will need to cooperate.

Graph the equation y = 3x2 - 5.
4
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A.
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B.
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4 8 12 16 20
x
X
-20 -16 -12 -8 -4
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20
16
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C.
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D.
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The san Andreas fault is an example of what kind of boundary?

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2. Choose the TWO examples of mass movement.

Which of the following statements about forestry education is true?
a.
All educational facilities cover forestry to the same depth.
b.
Individuals can pursue doctorates in forestry in any state.
c.
Program focus will remain the same from state to state.
d.
Some states have greater access to forestry programs than others.

PLEASE HELP I NEED HELP WITH NUMBER 6!

Explain a trend or pattern you
observe in the graph.

Elements with similar chemical properties are organized in the same _____.
electron shell
Period
row
group

Why could the combination of high rainfall, steep slopes and earthquakes be lethal for
a populated area near a volcano?

Approximately how many miles is it between the capital cities of sudan and south sudan?.

List the three main types of optical telescopes, and describe their differences.