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7th gradeUnit 1 Test
final exam studying
| Question | Answer |
|---|---|
| Point source pollution is the type of pollution that enters water from a ________ _________, such as drainpipes or ditches. | specific location |
| Nonpoint source pollution is pollution that enters a body of water from a ________ _________, that might include lawns, construction sites, and roads. | large area |
| When fertilizers enter water, the water becomes __________ with algae; when the algae die and decompose, ____________ is used quickly and is not available to other organisms. | choked, oxygen |
| 4. Human waste contains harmful ____________ that can make people sick. | organisms |
| Many metals are ___________. | poisonous |
| Oil and gasoline contain substances that might cause __________. | cancer |
| Heat _______________ the amount of oxygen in the water; this can damage organisms that are sensitive to temperature changes. | decreases |
| The Clean Water Act and Safe Drinking Water Act are both laws that help control _______________ ___________________. | water pollution |
| The Clean Water Act provided funds to build ______________ treatment facilities. | sewage |
| The largest source of water quality problems in the U.S. is ___________ _____________ pollution. | non-point source |
| Nitrogen fixation occurs when soil ________________________ form the nitrogen compounds plants need. | bacteria |
| The nitrogen cycle is the transfer of nitrogen from the atmosphere to the ______, to ________, and back to the atmosphere. | soil, living organisms |
| The carbon cycle describes how carbon molecules move between the ______and ______ world. | living, nonliving |
| Plants use nitrogen compounds to ______________. | build cells |
| In the nitrogen cycle, animal _____________ return some Nitrogen to the soil. | wastes |
| In the nitrogen cycle, animals and plants die and decompose, releasing __________ compounds back into the soil. | nitrogen |
| When harvesting, farmers remove all plant material, which prevents it from ________________ and returning nitrogen to the soil. | decaying |
| In the carbon cycle, producers use carbon dioxide to make ____________________. | sugar |
| In the carbon cycle, consumers break down sugar molecules and release ___________ as waste. | carbon dioxide |
| When organisms die, their carbon-containing molecules become part of the soil as they are broken down by ______________________. During the decay process, ______________ is released into the air. | decomposers, carbon dioxide |
| A sanitary landfill is an area where garbage is deposited and covered with soil to prevent _________________of land and water. | contamination |
| A hazardous waste is a poisonous, ignitable or ____________ - _____________waste. | cancer-causing |
| Agriculture increases soil ______________. | erosion |
| Cutting trees can affect _____________. | climate |
| Paving stops water from soaking into soil and causes_____________. Paving can also reduce ______________ _____________ supplies. | flooding, underground water |
| As landfills are used, ____________are required. | more |
| Pollutants can sometimes____________ from landfills. | leak |
| Sanitary landfills are lined with plastic, concrete, or clay-rich soils that trap the liquid waste, which greatly reduces the chance that _____________ will leak into the surrounding soil and groundwater. | contaminants |
| The effects of hazardous wastes include cancer, landfills are unsightly, pollution, sickness, and livestock eat metals and it gets in our ___________ sources. | food |
| There are 4 actions that have been taken by the government and citizens since 1980 that relate to hazardous waste. They include ________, ___________, ____________, and ____________. | laws, recycling, phytoremediation, organic products |
| Are plants or insects the first to show up during primary succession? | plants |
Created by:
mary352
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