GEOGRAPHY MIDDLE SCHOOL

What are convection currents

Answers

Answer 1
Answer: Breifly, a convection current is a current in a fluid that results from convection.
But, in more detail: Convection is one of the three main types of heat transfer, the other two being conduction and radiation. Unlike the other two, convection can only happen in fluids,- liquids and gases. This is because the molecules have to be free to move.

Heat energy can transfer by convection when there is a significant difference in temperature between two parts of a fluid. When this temperature difference exists, hot fluids rise and cold fluids sink, and thencurrents (movements) are created in the fluid. 
Answer 2
Answer:

Answer:

A convection current is the flow of heat within a fluid.

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Describe the two types of water scarcity.

Answers

Answer:

we have two types of water scarcity.

1.  Physical water scarcity

2. Economic water scarcity

Physical water scarcity prevails in those regions where surface and groundwater resources are inadequate to supply the region's water demands.

Explanation:

Answer:

physical and economic

Explanation:

Physical water scarcity occurs when and where there is not enough water to meet both human demands and those of ecosystems to function effectively. Arid regions frequently suffer from physical water scarcity. It also occurs where water seems abundant but resources are over-committed.

Economic water scarcity is caused by a lack of investment in water infrastructure or insufficient human capacity to satisfy the demand of water in areas where the population cannot afford to use an adequate source of water.

Hope this Helped!

Which is not classified as a fossil fuel? A. coal B. natural gas C. oil D. uranium D??2.Which is an accurate description of a winter solstice?

A.
The hemisphere is tilted away from the sun and the sun reaches its highest point in the sky.

B.
The hemisphere is tilted toward the sun and the sun reaches its highest point in the sky.

C.
The hemisphere is tilted toward the sun and the sun reaches its lowest point in the sky.

D.
The hemisphere is tilted away from the sun and the sun reaches its lowest point in the sky. B?

3.What does the red-shift of galaxies indicate?

A.
The universe is shrinking.

B.
The sizes of the galaxies are shrinking.

C.
The galaxies are moving toward each other.

D.
The universe is expanding. A?

Answers

okay so for the first question the answer is D because uranium is not classified as a fossil fuel. 
for the second one i believe its C: The hemisphere is tilted toward the sun and the sun reaches its lowest point in the sky.

and for the third question the answer is also D because the universe would be moving away form each other or in this case (expanding) 
soooo
#1. D 
#2. C
#3. D 
hope this helps:)
1 is B, 2 i think is D 3 i belive, is also D

What is the Independance date of Sri Lanka?

Answers

The Independence Day of Sri Lanka is celebrated on 4th of February each year. Sri Lanka got its Independence from the British rule in the year 1948.This day is observed as a national holiday in the country ofSri Lanka. People celebrate this day by hoisting national flags and rememberingthose people that laid down their lives for the independence of this country.Numerous national struggles are remembered for getting the Independence fromthe oppression of the British rule.

Their independence was finally declared on February 4, 1948

Forces used for the strike-slip fault in Iran:

Answers

Answer:

Strike slip faults

Strike-slip faults are vertical (or nearly vertical) fractures where the blocks have mostly moved horizontally. If the block opposite an observer looking across the fault moves to the right, the slip style is termed right lateral; if the block moves to the left, the motion is termed left lateral.

Explanation:

Canada contains Of the earths forests.A. 5%
B. 10%
C. 20%
D. 30%
Please select the best answer from the choices provided

Answers

Answer:

The answer is 10%

Explanation:

I just took the lecture

Answer:

D. 30%

Explanation:

Canada is the second largest country in the world with forest or other wooded land making up 40% of its 979 million hectares. Canada's forest cover represents 30% of the world's forest and 9% of the world's overall forest cover.

Which of the following is an accomplishment of the Zhou dynasty? A. They conquered the Huns in the north. B. They developed a writing system. C. They established a system of money. D. They established the practice of ancestor worship.

Answers

A. they conquered the huns in the north.

Answer:

I believe it is C, They established a system of money.

Explanation:

Here are my edg2020 notes: Zhou Accomplishments

-Improved upon Shang Achievements

-Iron metalwork

-Horseback riding

-Developed a money system that replaced the barter system

-Established a merchant social class
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