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Understanding Solar Energy

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Questions and Answers

What is the primary source of solar energy on Earth?

Nuclear fusion reactions within the Sun (correct)

Reflected light from the Moon

Cosmic radiation from other galaxies

Thermal energy from the Earth's core

How does solar energy travel from the Sun to the Earth?

By being carried by solar wind particles

In the form of waves called radiation (correct)

Through a network of power lines

Via a series of satellite relays

What happens to solar radiation when it reaches the Earth's atmosphere?

It passes through the atmosphere unaffected

It is entirely absorbed by the atmosphere

Some is filtered or reflected, and some reaches the surface (correct)

It is converted into electrical energy by the atmosphere

What is the term used to describe the energy radiated back from the Earth's surface?

Terrestrial radiation Signup and view all the answers

Which of the following is NOT directly influenced by solar energy?

The formation of petroleum reserves Signup and view all the answers

What is the primary factor that causes the change of seasons on Earth?

The combination of the Earth's tilt and its orbit around the Sun Signup and view all the answers

How does the angle of the Sun's rays affect the distribution of solar energy on Earth?

Areas with a more direct angle receive more concentrated solar energy Signup and view all the answers

What is the primary role of greenhouse gases in the Earth's atmosphere?

To absorb and trap thermal radiation from the Earth, warming the atmosphere Signup and view all the answers

Which of the following statements about the greenhouse effect is true?

An excessive amount of greenhouse gases can lead to global warming Signup and view all the answers

What is the primary factor contributing to the increase in greenhouse gas levels in the Earth's atmosphere?

Burning of fossil fuels and livestock farming Signup and view all the answers

What causes the seasons to change on Earth?

The tilt of the Earth's axis relative to the Sun Signup and view all the answers

During the northern hemisphere's winter solstice, what is the position of the region above the Arctic Circle?

It experiences a full 24 hours of darkness Signup and view all the answers

What is the average temperature on Earth across day and night?

$61^\circ$F ($16^\circ$C) Signup and view all the answers

How does the distance between the Earth and the Sun change throughout the year?

The distance decreases during the northern hemisphere's winter Signup and view all the answers

How does the length of day affect temperatures on Earth?

Longer days lead to warmer temperatures Signup and view all the answers