5.3 Ozone Layer and Greenhouse Effect

Learn about the ozone layer and greenhouse effect! Science worksheet for understanding Earth's atmosphere.

The greenhouse is always bad. true false Which gas is NOT a major greenhouse gas today? carbon dioxide neon ozone methane Greenhouse Gas Matching Too Many Greenhouse Gases Earth would be very HOT Too Few or No Greenhouse Gases Earth would be very COLD Earth's Atmosphere Layer Number Layer Name Important Feature 5 exosphere goes into space 4 thermosphere ionosphere and auroras 3 mesosphere where meteors burn 2 stratosphere ozone layer 1 troposphere weather Earth's Crust Earth's Crust Earth's Crust History of the Atmosphere Fill in the Blank Earth’s early atmosphere was made of 80% nitrogen, 18% carbon dioxide, 1% hydrogen and 1% water vapor. Scientists think these gases came from volcanoes.About 2.7 billion years ago, tiny plants called cyanobacteria started to grow. These cyanobacteria turned almost all of that carbon dioxide into oxygen. They did not change the amounts of nitrogen gas.Now that the atmosphere had oxygen, complex life and animals could start to grow. Animals and humans need oxygen to survive.Earth’s atmosphere today is made of 78% nitrogen, 21% oxygen and 1% other gases. The 1% other is all other gases, including greenhouse gases. Greenhouse Effect Fill in the Blank The greenhouse effect is when greenhouse gases trap energy from the Sun in the atmosphere. Greenhouse gases are gases that absorbradiation (energy) very well. Important greenhouse gases are carbon dioxide and ozone. The greenhouse effect is good and helps keep Earth warm.Scientists are worried about greenhouse gases, though. Humans make carbon dioxide when we burn fossil fuels like gasoline. Since humans are burning more fossil fuels, we are adding more greenhouse gases to the atmosphere. More greenhouse gases means that Earth gets warmer, which is bad for humans, animals and plants. What is the "job" of the ozone layer? protect Earth from dangerous energy from the Sun keep Earth warm make clouds and rain What is the "job" of the greenhouse effect? protect Earth from dangerous energy from the Sun keep Earth warm make clouds and rain