Each year, a large hole appears in it. It isn't an actual hole, like a hole in a pocket, but a layer getting thinner as it shows up on the satellite pictures. The "hole" is right over Antarctica, covering an area about the size of the United States. Experiments done in Antartica show that the hole in the ozone layer appears to let in twice as much ultraviolet radiation as normal, according to measurements researchers made there about two years ago. ... Scientists think that synthetic chemicals called chlorofluorocarbons are what is eating the hole in the ozone layer. ...

• Word Count: 1369
• Approx Pages: 5
• Has Bibliography
• Grade Level: High School

Whether it is a supernova explosion, a black hole, or a neutron star that is why we know the most about death. ... We all should know what a black hole is, but do you know where they come from? Black holes come from stars that have collapsed one itself and due to the constant pull of gravity these holes form. They are black because of the nothingness of the interstellar medium (everything that you see in space where nothing is) but they aren"t actually holes to nowhere or a bottomless pit in space they are points in space where gravity is so great that not even light can escape its force. .....

• Word Count: 1520
• Approx Pages: 6
• Grade Level: High School

When the cells catch photons, one electron is then set free causing a hole to be formed where that electron was. The electric field will send the electron to the negative side and the hole will be sent to the positive side. This causes disruption because the free electron will want to unite with the hole again. ...

• Word Count: 1616
• Approx Pages: 6
• Grade Level: High School

The fewer and smaller holes in the fabric between the threads allow less sunlight to pass through ( QLD Cancer Fund booklet 2001).If you can see through the fabric, than the sun can get to your skin easily ( http://www.sunsafe.com ).Some of the other factors that can make clothing sun protective is its colour, thickness of fabric, fibre content, elasticity, how it reacts when wet (http://www.americansun.org). ...

• Word Count: 2039
• Approx Pages: 8
• Has Bibliography
• Grade Level: High School

Space Colonization The human race has always held an irresistible urge to venture out into the unknown for the benefit of man, science, and civilization. Throughout the ages the human race has always had an unquenchable curiosity for the unknown. We have always fed that curiosity by expanding o...

• Word Count: 1776
• Approx Pages: 7
• Grade Level: High School