Flashcards
Untitled
Flashcards do conjunto (33)
- 1What is the critical difference between today's global warming and Earth's previous climate changes?They relaese large amounts of CO2 in atmosphere
- 2What would accurately describe the use of fossil fuels for energy?they release large amounts of CO2 in atmosphere
- 3Why does no-till farming help conserve soil fertility?remnants of previous crop left to slowly decay.
- 4Where would you expect to find a climate with mild temperatures and frequent rain?coastal region 30 degrees latitude
- 5When it is summer in the southern hemisphere, what is it in the northern hemisphere?Winter
- 6What do we know about the physical properties of air?warm air holds more water vapor then cold air.
- 7Why is polluted groundwater difficult to clean?groundwater deep in the ground dispersed through large rock areas, pollutants cling to materials that make up aquifers, recycling process takes hundreds of thousands of years.
- 8What do we know about pest populations that damage plants?resistance to pesticides via natural selection
- 9What are the main uses of fuel?transportation, manufacturing, heating and cooling buildings
- 10New nuclei and neutrons result from what?Splitting of an atoms nuclei
- 11What do we know about thinning ozone?happens over both polar regions, related to seasonal changes, takes many years to reverse.
- 12Where do large cities get water for households and industries from?rivers and lakes
- 13Solar energy from the sun is contained in what?fossil fuels
- 14Why are chlorofluorocarbon molecules environmentally significant?chlorine atoms destroy the ozone
- 15Because of the Endangered Species Act, the sale of protected animals is what?punishable by substantial fine
- 16A fuel's suitability is dependent on what?energy content, cost, availability
- 17What would be a very effective way to slow the loss of biodiversity?creating large parts/preserves in biodiversity hotspots
- 18What do greenhouse gases do?Trap heat that is radiated upward from earth.
- 19Why is biodiversity important to ecosystems?helps populations adapt to ecological changes
- 20Why do ozone holes appear in polar regions during springtime?Ozone destroying chlorine atoms released from polar stratospheric clouds in spring
- 21The 1990 Oil Pollution Act requires what?Tankers and U.S. waters must be double hulled
- 22Climate is what in a region?long term prevailing atmospheric conditions
- 23What factors help predict future oil production?changes in technology, cost of obtaining fuels, number of oil deposits discovered
- 24In the 1990's, energy needs in the United States have done what?Risen slightly
- 25What are persistent pesticides?they become concentrated in organisms high on the food chain
- 26Why have some communities banned detergents with high levels of phosphatesFish suffocate and die
- 27What explains the circulation patterns in the atmosphereWarm air rises and cools
- 28What do we know about global warming?CO2 levels risen over last 3o years, global temperature CO2 concentration are related, reforestation is not sufficient
- 29How have areas of the world without fresh water become habitable?Water management projects, diverts water to places
- 30what do we know about the effects of water pollution on ecosystems?magnifies overtime within food chain
- 31Where do most of the pollutants in the ocean come from?activities on land
- 32what happens during the process of nuclear fission?neutrons split uranium atoms, forms new elements, releases several neutrons
- 33What agricultural product requires the least amount of energy?wheat
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- Science Final Review FlashCards sobre Untitled, criado por AlainaFerraro18 em 24-05-2013.
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