| A | B |
|---|
| Disadvantages to solar energy | Darkness |
| Disadvantages to oil | nonrenewable, toxic to oceans |
| Disadvantages to wood | Destruction of habitat |
| Disadvantages to nuclear | meltdowns, glowing for hundreds of years |
| Advantages to hydroelectric energy | No pollution, water flows down hill |
| Advantages to geothermal energy | Steam rises, no pollution |
| Disadvantages to Wind energy | visual, noise pollution, bad for birds who make their nests in windmills |
| Advantages to coal | cheap |
| Advantages to biofuels | Renewable, anyone can produce it. |
| Advantages to Natural Gas | Abundant and less expensive than other fossil fuels |
| Electric power | the ability of electricity to do work |
| Electric energy | the amount of electricity your house uses in a month |
| Constructive Interference | when 2 waves collide and create one bigger wave. |
| Destructive Interference | When 2 waves collide and the resulting wave is much less or completely destroyed. Used in technology to decrease noise like on airplanes or jack hammers |
| Dopper Effect | Moving sounds get higher pitched and louder as they approach you and lower and quieter as they move away from you |
| 4 things that all waves have in common | amplitude, wavelength, wave speed, frequency |
| Nodes | Created on a standing wave by destructive interference. Appears as a dead spot on the string. |
| Antinodes | Parts on a standing wave where it appears to have a large amplitude. Caused by constructive interference. |
| Tinnitus | A constant ringing in the ears that doesn't go away |
| Hyperacusis | When sounds are over-amplified due to exposure to excessive noise. This can be extremely painful |
| 4 Characteristics (functions) of our atmosphere | 1. provides gases necessary for life. 2. protects Earth from meteors etc. 3. Protects from harmful radiation. 4. Regulates temperature on the planet |
| 4.5 billion years | the age of our atmosphere |
| Oxygen is put into our atmosphere by 2 processes | hydrolysis of water by the sun's energy, and photosynthesis |
| Nitrogen | 78% of our atmospheric gas |
| Oxygen | 21% of our atmospheric gas |
| Argon and trace gases | 1% of our atmospheric gas |
| Troposphere | 1st layer closest to the Earth. "Layer of Mixing". Contains most of our weather |
| Stratosphere | The 2nd layer from the Earth. Contains jet streams. |
| Mesosphere | 3rd layer from the Earth. Burns up meteors and debris entering the atmosphere |
| Ionosphere | The 4th layer. Reflects all AM radio waves back to Earth. |
| Thermosphere | The last layer of the atmosphere. Closest to the sun. Can reach up to 2000 degrees Celcius. |
| Acid Rain Gases | NOx (NO2 and NO3) and SO2 |
| Effects of Acid Rain | Acidification of lakes and streams. Damage to vegetation and human tissues. Accelerates decay of building materials. Poor visibility. |
| CFC's | chloroflorocarbon - used as aerosol propellant and refrigerant |
| Air Pressure | Gravity pulling air down. 14.7#/sq. in. at sea level. |
| Isobar | Curving lines on a weather map that connect areas of equal pressure. |
| A type of barometer | Anaeroid - it is an air tight box that detects changes in atmospheric pressure. When there is high pressure, the box is squeezed. When there is low pressure the box expands. |
