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murzikaleks [220]
3 years ago
6

How did “syphilis” diffuse across Europe AND Africa if the Americas never “gave” it to Africa?

Geography
1 answer:
shutvik [7]3 years ago
4 0

Answer:

Explanation:

Syphilis was transmitted by colon conquerors from America to Europe, according to a study by researchers in the United States and Canada, the first documented case of syphilis in Europe was in 1945 in Naples after the first arrival of colonist of America to Europe.

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Where and when is air conditioning most useful ?
Aliun [14]

Air conditioning is most useful during a warm climate in summer.

  • The summer season is perfect as the weather is hot and warm with heat and loo winds.
  • Summer is preferably for air conditioning as there is no breeze and rainfall.
  • The Spring season is windy and cold.
  • Winters are cold season with snow and cold winds.
  • Air-condition or AC helps in cooling room temperature by removing moisture and warmth.

Therefore we can conclude that air condition is perfect during a warm climate in summer.

Thus option "a warm climate in summer"  is correct answer.

Learn more about  "air conditioning" here:

brainly.com/question/20395664

4 0
3 years ago
Which model of the solar system has Earth at the center of the revolving planets and stars? An example model is shown
viktelen [127]

Answer:

The geocentric model of the solar system has Earth at the center.

Explanation:

Throughout history, there have been multiple different models that humans thought of or created through observation. The two most famous ones from the past are the geocentric and heliocentric, with the geocentric coming earlier and for a very long time being the model that was accepted by the majority.

The geocentric model is a model that puts Earth in the center of the universe. Earth is presented as the most important and largest object in the universe. All of the space bodies, the Sun, stars, Moon, planets, were thought to revolve around Earth. As it turned out, this model was full of mistakes. Everything about it was wrong, with the only correct thing being that the Moon is actually revolving around Earth.

8 0
3 years ago
How can one type of rock become many different types of metaphoric rock?​
Naya [18.7K]

Answer:

One rock can become many different types of metamorphic rock depending on the heat, temperature, and fluid conditions.

Explanation:

6 0
3 years ago
How does a scientist know how to draw isochrons to connect basalt flows on land with the ocean floor
viva [34]

Answer:  Sea-floor spreading — In the early 1960s, Princeton geologist Harry Hess proposed the hypothesis of sea-floor spreading, in which basaltic magma from the mantle rises to create new ocean floor at mid-ocean ridges. ... A test of the hypothesis of sea-floor spreading was provided by studies of the Earth's magnetism.

4 0
3 years ago
Read 2 more answers
How is the water in a lake different from the water in a stream? What's the difference between a closed lake and an open lake? E
serg [7]

1. The main difference between the water in the lakes and the water in the streams is that the water of the lakes is enclosed, thus it is more static (relatively speaking), while the water from the streams is moving along the banks. The water of the lakes is relatively static. Not to get me wrong, it moves, but it moves in an enclosed area, and it moves horizontally, not downward. The water of the streams on the other hand is moving much quicker, and it moves along the banks. This water moves downward, from the higher parts toward the lower parts.

2. The difference between a closed lake and an open lake is that the close lake doesn't have water from another body of water coming in and going out of it, while the open lake has exactly that. The close lakes don't have rivers and streams coming into them, nor there's a river or stream coming out of them, they are closed by higher physical features. The open lakes on the other hand have rivers and streams coming into them, as well as having an opening from the which the water is coming out, thus there's a stream or river coming out of it, which makes the water slowly circulate and change.

3. The lakes are not the most reliant bodies of water when it comes to being long lasting. The reason for that is that they are bodies of water that are the easiest affected by the changes in the climate, as well as the changes in the relief. The geological activities can simply make the lake go up, or lean sideways, thus it can lose its water through runoff. If the rainfall decreases, then the lake will have higher loss of water through evaporation then what it gets, resulting in drying out.

4. The main difference between the marshes and the swamps is that the marshes are wetlands that are very rich in nutrients and they support grasses and reeds, while the swamps are wetlands that can support trees and other woody plants. The marshes can be found on the fringes of the lakes and the rivers, and they re practically a transitional zone between the waters of these water bodies and the land. The swamps are found along the shores of the lakes and the large rivers.

5. The wetlands have numerous functions in the natural order, some of which are:

- flood storage

The waters of the wetlands manage to slow down and store big portion of any incoming water, thus being able to either stop a flood, or at least minimize its effects

- protecting the water quality

The wetlands, with the amount of water they have, as well as all the different types of bacteria in them, manage to filter out the waters that polluted and coming into them, thus serving as a nice natural filter.

- prevention of erosion

Because the wetlands manage to slow down the waters, they contribute significantly to minimizing the downstream erosion, thus keeping the soil in healthier condition

- providing habitat for lot of plants and animals

The wetlands offer nice living conditions for lot of plants and animals. They provide lot of water, often rich in nutrients, shelter, hunting ground, food sources, enabling for numerous different types of ecosystems to develop in them.

3 0
3 years ago
Read 2 more answers
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