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test science
| Question | Answer |
|---|---|
| how much carbon come from car exhaust | 60% |
| What happens when thermal energy leaves the Sun | It is reflected, absorbed, and/or radiated in Earth's atmosphere and/or at its surface including all of the land and water. |
| The pH of acid rain is | any measurement lower than 5.6 on the pH scale. |
| How does Chlorofluorocarbons destroy the ozone layer | it destroys ozone molecules |
| convection | is the transfer of heat by the flow of a heated material. |
| Water is the only substance that exists as | a solid, liquid, and gas in Earth's atmosphere. |
| Too much exposure to ultraviolet radiation can cause | skin cancer |
| Electrically charged particles are found primarily in | the ionosphere |
| The exosphere merges into | outer space |
| Radiation is the transfer of energy by | electromagnetic waves |
| Air in the troposphere is warmed by | heat from the Earth's surface |
| The troposphere is the layer of the atmosphere | closest to Earth's surface |
| The state of matter where the molecules are spaced the farthest apart is | a gas |
| Emissions are controlled by | laws and new technology (catalytic converters, smokestack scrubbers, electrostatic precipitators) that reduce or prevent air pollution |
| Air above the equator is | heated more than at any other place on Earth |
| Reflection and absorption by the atmosphere prevent | some radiation from the Earth's surface |
| Temperatures in the thermosphere are | very warm |
| smog | is the brown haze that forms over some cities |
| A chlorine atom in a chlorofluorocarbon molecule is responsible for | destroying ozone molecules |
| A catalytic converter, | an emissions control device, was added to automobiles in the mid-1970's |
| We can’t see, smell, or taste | ozone gas but it is important to us because it shields us from the harmful ultraviolet radiation |
| ozone gas protects us from | too much exposure which can damage our skin, cause cancer, weaken our immune system, and even damage our eyes |