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Sara Elkordy

April 25th, 20129G2

Greenhouse effect and Global warming

How does greenhouse gases affect global warming?

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What is a greenhouse?

A greenhouse is a house surrounded by glass.

Greenhouses are used primarily for planting.

When the sun shines, the inside of the greenhouse becomes warmer as the glass retains the heat.

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Why is the earth compared to a greenhouse?

Gases around the earth act like the surrounding glass walls of a greenhouse.

Earth's surface warms up due to the solar energy.

At night, the Earth’s surface cools down releasing the heat stored during the day.

BUT, some of the heat is trapped by the glass walls around the earth(the greenhouse gases). 

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Graphical Representation of the Greenhouse Effect

The heat from the sun reach both the glass house and the earth, but the glass walls and greenhouse gases don’t allow the heat to be released from the atmosphere.

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What are the Greenhouse gases that trap the heat?

The main greenhouse gases include: Carbon dioxide Water vapor Methane Nitrous oxide

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What is global warming?

Global Warming refers to the rise of the average temperature of the atmosphere.

The rise of the average temperature is due to higher concentration of greenhouse gases.

Greenhouse gases result mainly from the rising rate of pollution.

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Global warming and Greenhouse Gases are both caused mainly by Pollution:

burning of fossil fuels cause greenhouse gases to escape into the air

The cutting down of trees (trees soak up co2)

Burning of gasoline (transportation) Increase of chemical fertilizers on croplands

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How do greenhouse gases cause global warming?

Many causes of global warming lead to more carbon dioxide in the air.

Some farming methods increase the amount of methane and nitrous.

Greenhouse gases are the main reason of global warming

Example: burning fossil fuels increase greenhouse gases increase global warming

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Facts

Remember! The greenhouse gases act like the glass walls of a greenhouse but for the Earth!

If the greenhouse gases continuously increase, the heat will remain

inside the atmosphere insteadof going back to space.

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More Facts!

A main reason of the increase of greenhouse gases is due to the increase of pollution.

The sun's radiations are trapped by greenhouse gases within the

Earth's atmosphere, which causes the temperature of the plant to rise.

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WAYS TO SAVE THE PLANET:

Recycle Reduce Reuse Examples: -recycle old paper -car pool