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Global Warming

Enviado por Analía Massa



Partes: 1, 2

  1. Climate change, what it is
  2. Greenhouse effect, climate change, and global warming
  3. Climate and Weather
  4. Greenhouse Effect
  5. What is the climate system?
  6. Climate"s come a long way!
  7. Can we change the climate?
  8. When do you send greenhouse gases into the air?
  9. So... What"s the big deal?
  10. We can make a difference!

Climate change, what it is

Earth has warmed by about 1 over the past 100 years. But why? And how? Well, scientists are not exactly sure. The Earth could be getting warmer on its own, but many of the world's leading climate scientists think that things people do are helping to make the Earth warmer.

Earth's Temperature

GREENHOUSE EFFECT, CLIMATE CHANGE, AND GLOBAL WARMING

The Greenhouse Effect: Scientists are sure about the greenhouse effect. They know that greenhouse gases make the Earth warmer by trapping energy in the atmosphere.

Climate Change: Climate is the long-term average of a region's weather events lumped together. For example, it's possible that a winter day in Buffalo, New York, could be sunny and mild, but the average weather - the climate - tells us that Buffalo's winters will mainly be cold and include snow and rain. Climate change represents a change in these long-term weather patterns. They can become warmer or colder. Annual amounts of rainfall or snowfall can increase or decrease.

Global Warming: Global warming refers to an average increase in the Earth's temperature, which in turn causes changes in climate. A warmer Earth may lead to changes in rainfall patterns, a rise in sea level, and a wide range of impacts on plants, wildlife, and humans. When scientists talk about the issue of climate change, their concern is about global warming caused by human activities.

Climate and Weather

Weather is all around us. Weather may be one of the first things you notice after you wake up. Chances are, if it is cold and snowing, you'll wear a jacket when you go outside. If it's hot and sunny, you may wear shorts.

Sounds pretty simple, right? But what about climate? How is it different from weather? And what is weather, exactly?

2 Cartoons of same house: one in rainstorm and one on sunny day. The weather can change very quickly from rain to sunshine.

Weather

 Weather describes whatever is happening outdoors in a given place at a given time. Weather is what happens from minute to minute. The weather can change a lot within a very short time. For example, it may rain for an hour and then become sunny and clear. Weather is what we hear about on the television news every night. Weather includes daily changes in precipitation, barometric pressure, temperature, and wind conditions in a given location. What is your weather like today?

Climate

 Climate describes the total of all weather occurring over a period of years in a given place. This includes average weather conditions, regular weather sequences (like winter, spring, summer, and fall), and special weather events (like tornadoes and floods). Climate tells us what it's usually like in the place where you live. San Diego is known as having a mild climate, New Orleans a humid climate, Buffalo a snowy climate, and Seattle a rainy climate. How would you describe the climate where you live?

Cartoon of dinosaurs 65 million years ago to ice age 15000 years ago to present age of modern man. Climate can change too, but in the past it has taken a very long time to do so.

Greenhouse Effect

Greenhouse

The greenhouse effect is the rise in temperature that the Earth experiences because certain gases in the atmosphere (water vapor, carbon dioxide, nitrous oxide, and methane, for example) trap energy from the sun. Without these gases, heat would escape back into space and Earth"s average temperature would be about 60ºF colder. Because of how they warm our world, these gases are referred to as greenhouse gases.


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