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Finger [1]
3 years ago
10

Which event caused a decrease in trans-saharan trade

Geography
2 answers:
d1i1m1o1n [39]3 years ago
8 0
The correct answer is letter D. the increase in coastal trade with Portugal. It caused a decrease in Trans-Saharan Trade. Trans-Saharan trade needs to travel across the Sahara until you will reach the sub-Saharan part of Africa. Its peak of trade runs from the 8th century towards the early 17th century. The Portuguese journeyed towards the coastal areas of West Africa, opening new avenue in trade.<span>.</span>
tankabanditka [31]3 years ago
3 0

D..the increase in coastal trade with portugal

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32. Volcanoes consist of A. leaves, stems B. lava flows, pyroclasts C. joints, branches D. faults, holes E. folds, trees
Bingel [31]

The correct answer is B. Lava flows, pyroclasts.

Explanation

A volcano is a mountain or hill that has an opening through which gaseous, liquid or solid materials can escape from the interior of the Earth. At the top of this cone, there is a concave formation called crater or chimney. When activity occurs in a volcano it is because it is erupting. Also, when it is erupting, the molten rock that comes from the Earth's mantle, known as magma, comes out. Once the magma comes to the surface, it loses the gases it contains because it evaporates, and when it drains the slopes of the cone it is known as lava, which flows from the top of the volcano. Finally, the waste expelled by a volcano through its crater during an eruption is known as pyroclasts. So, the correct answer is B. Lava flows, pyroclasts.

3 0
3 years ago
What are the consequences of increased nitrogen and phosphorus into water systems?
larisa86 [58]

Nutrient pollution has impacted many streams, rivers, lakes, bays and coastal waters for the past several decades, resulting in serious environmental and human health issues, and impacting the economy. Too much nitrogen and phosphorus in the water causes algae to grow faster than ecosystems can handle.

<u>What are two sources of increased nitrogen and phosphorus in a river that result from human activity?</u>

Phosphorus (P) and nitrogen (N) are the primary nutrients that in excessive amounts pollute our lakes, streams, and wetlands. Nitrogen is essential to the production of plant and animal tissue. It is used primarily by plants and animals to synthesize protein.

<u>What happens if there is too much nitrogen in an aquatic ecosystem?</u>

Excess nitrogen can harm water bodies. Excess nitrogen can cause overstimulation of growth of aquatic plants and algae. Excessive growth of these organisms, in turn, can clog water intakes, use up dissolved oxygen as they decompose, and block light to deeper waters.

<u>How does phosphorus affect algae growth?</u>

Too much phosphorus can cause increased growth of algae and large aquatic plants, which can result in decreased levels of dissolved oxygen– a process called eutrophication. High levels of phosphorus can also lead to algae blooms that produce algal toxins which can be harmful to human and animal health.

<u>What are the effects of nitrates and phosphates in aquatic ecosystems?</u>

However, at night, dissolved oxygen may decrease to very low levels as a result of large numbers of oxygen consuming bacteria feeding on dead or decaying algae and other plants. Eutrophication – “The process by which a body of water acquires a high concentration of nutrients, especially phosphates and nitrates.

<u>Why do nitrogen and phosphorus promote algae growth?</u>

Nutrients promote and support the growth of algae and Cyanobacteria. The eutrophication (nutrient enrichment) of waterways is considered as a major factor. The main nutrients contributing to eutrophication are phosphorus and nitrogen. ... This phenomenon encourages the growth of algae.

<u>Why is too much nitrogen and phosphorus bad for the environment?</u>

Nutrient pollution is one of America's most widespread, costly and challenging environmental problems, and is caused by excess nitrogen and phosphorus in the air and water. Too much nitrogen and phosphorus in the water causes algae to grow faster than ecosystems can handle.

Hope this helps :)

7 0
3 years ago
Name and discuss two way in which a student can pay for his or her studies if their parents can't afford it?​
Kamila [148]

Answer:

Fill out the FAFSA. ...

Search for scholarships. ...

Choose an affordable school. ...

Use grants if you qualify. ...

Get a work-study job. ...

Tap your savings. ...

Take out federal loans if you have to. ...

<h3>Borrow private loans as a last </h3>
4 0
2 years ago
A short note on Roaring Fortilies??​
lbvjy [14]

Answer:

Sailors call the latitudes between 40 and 50 degrees south of the equator the Roaring Forties. ... Warm air moving poleward (on both sides of the equator) is the result of nature trying to reduce the temperature difference between the equator and at the poles created by uneven heating from the sun.

6 0
3 years ago
15pts!
DanielleElmas [232]
I agree with the answer C
4 0
3 years ago
Read 2 more answers
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