Science Test 4.3 & 6
Terms in this set (49)
What are two important components of the water cycle?
Precipitation and evaporation
What are all living things made of?
What is a component of proteins?
What do carbon, water, and nitrogen cycle have in common?
The substance is required by all living things and is involved in many processes that occur in all living things
The conversion of nitrogen gas to ammonia by bacteria is?
When water percolates into the soil it becomes what?
What happens to phosphorus when humans and animals die?
The phosphorus returns to the soil
What element does calcium phosphate dissolve into that is taken up by plants roots?
What form does carbon return to the environment after combustion?
What is the main source of energy for the water cycle?
What are three parts of the nitrogen cycle?
- Conversion of atmospheric nitrogen into usable organic compounds by bacteria
- Conversion of nitrogen from decaying organisms into ammonia
- Nitrogen fixation
What is the name of the process that uses carbon dioxide to build organic molecules in plants?
What are the three main areas that move water in the water cycle?
Atmosphere, land, and oceans
What is ground water?
Water trapped beneath the soil
What is transpiration?
The evaporation off of plants
What is a renewable resource?
Resources that can replenish themselves naturally
Why is coal a nonrenewable resource?
Because it takes millions of years to form
Headaches and upper respiratory infections are linked to what?
Is it possible for a renewable resource, like trees, to be used up?
Yes, because if you cut them down faster than they can grow then they will be used up
What are some examples of renewable resources?
Wind, solar energy, trees, fish
What are three effects of air pollution?
Respiratory problems, acid rain, global warming, damage to ozone
What are some examples of nonrenewable resources?
Oil, coal, natural gas
Why is growth of human population a concern to environmentalists?
The more people the greater demand on the environment and resources, which are limited
What human activity causes the greatest loss in biodiversity?
What is a CFC and why is it a problem?
They are chlorofluorocarbons and they damage the protective ozone layer
What is acid rain?
Precipitation with sulfur-containing pollutants that lowers the pH of lakes and often kills organisms
What is global warming?
The gradual increase in average global temperatures
What is the purpose of ozone in the atmosphere?
The ozone absorbs harmful radiation from the sun
Why are algal blooms deadly to fish?
They cause death to fish by depleting oxygen supply in the water
What is the greenhouse effect?
The heat-trapping ability of carbon dioxide and water vapor in the atmosphere
What are three sources of water pollution?
Livestock, fertilizers, pesticides, industrial waste, oil runoff
What is something that has contributed to the extinction of species?
Extinction of a species has been sped up by the activities of humans
What is not a direct consequence of air pollution?
What is terracing?
Changes a steep field into a series of flat steps that stop gravity from eroding the soil.
The process of clearing forest.
What are two invasive species we learned about?
The zebra mussel and the Nile perch
What is DDT and what effect did it have on nature?
It was a pesticide and it harmed the bald eagle
What are some ways to effectively reduce resource use?
Taking bottles to a recycling center, taking shorter showers, lining trash cans with grocery bags
Why might temperature on the Earth continue to increase?
Because increasing carbon dioxide in the atmosphere will trap in more heat
What is an example of restoration?
The planting of a park over a closed landfill
What are three effective ways to prevent pollution?
Stricter standards, research and technology, better education of the public
What are three things that coal, oil, and natural gas have in common?
They are fossil fuels, release carbon dioxide when burned, are formed from decayed plants
What step is needed to help solve environmental problems?
Educating the public about the problems and the costs of their solutions
What are some examples of technology that has decreased pollution?
Solar panels, hybrid cars, scrubbers
The process of combining nitrogen with hydrogen to form ammonia
The process in which plants absorb nitrogen
Nitrogen from animal waste/decaying bodies is returned to the soil by bacteria
Ammonia is converted to nitrite then to nitrate
Nitrate is changed to nitrogen gas which returns to the athmosphere