Inconvenient Truth- fact 1

Fact: The radiation waves from the sun are absorbed by Earth and causes it to warm up. Then the radiation is re-radiated out of Earth as infrared waves.


SOURCE 1: http://science.hq.nasa.gov/kids/imagers/ems/infrared.html

• The source is Ruth Netting, official for National Aeronautics and Space Administration.
• The source's credentials are NASA.
• The source is very credible because scientists wrote it and officials, like Ruth Netting constantly proofread it and update it.
• The source says that the long infrared waves are thermal, so we experience them in the form of heat from a fire or the sun. The short infrared waves are not hot at all, we can't even feel them.
• Yes, I believe the source because it is very credible and it backs up its information with proof that they have researched.

SOURCE 2: http://oceanworld.tamu.edu/resources/oceanography-book/radiationbalance.htm

• The source is Robert Stewart.
• The source's credentials are Texas A&M University.
• The source is very credible because it is an online book written by an experienced author.
• The source says that 45% of the heat that warms the atmosphere is radiated to space and 55% of the heat that warms the atmosphere is quickly re-radiated radiated back to the Earth. This warms te Earth and the lower atmosphere.
• I believe the source because it is saying that without greenhouse gases, the planet wouldn't be suitable for life, which is true because we can't live without water vapor, carbon dioxide, methan, ozone, and nitrous oxide.

SOURCE 3: http://www.tech-faq.com/infrared.shtml

• The source is Friedrich Nietzsche.
• This source's credentials are TechFAQ.
• This source isn't very credible because it doesn't say where the writer went to university or how far he got in his profession.
• The source says that infrared waves can either be visible or in the form of microwaves. Visible infrared waves are very short and can be seen as either red or violet. The longer infrared waves, which are closer to microwaves, give off radiation in the form of heat.
• I believe the source because it is saying basically what the other two sources are saying and it makes sense because the sun's infrared waves are thermal and give off radiation in the form off heat which is why people get sunburned, for example, when they lay out too much in the sun.