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21 (the meaning of halflife)
Review moment
100

What is a major argument for the use of alternative energy sources rather than burning fossil fuels?

a reduction in the production of GHGs, reduction of air pollution, renewable sources of energy

100

What two global warming caused factors are resulting in global sea level rise?

thermal expansion of water and melting of glacial ice

100

What layer of the atmosphere is ozone harmful to human health?

troposphere

100

What is a substance's "half life"?

the time it takes for the property of a substance to be halved

100

The net primary productivity of an ecosystem is 176,000 kcal/m2/yr. If the respiration of that producers is 200,000 kcal/m2/yr, what is the gross primary productivity of that ecosystem?

376,000 kcal/m2/yr

200

What energy source has very little GHG emissions but is a nonrenewable energy source?

nuclear energy (hydrogen fuel cells also possible if using fossil fuels as fuel source)

200

List the 4 principle greenhouse gases in order of GWP from highest to lowest.

1. CFCs

2. NO2

3. CH4

4. CO2


200

What element in human made substances and arctic ice crystals contributes significantly to ozone depletion?

chlorine

200
How many half lives must occur for a substances radioactivity to be 1/4 of its original value?

2 half lives

200

How is most waste in the U.S. disposed?

Landfills

300

What are 2 major disadvantages of Nuclear power

radioactive waste, thermal pollution, nuclear meltdown risk

300

What was the name of the first international treaty that aimed to combat anthropogenic global warming?

Double points: What category of countries are not bound by the treaty?

Kyoto Protocol - undeveloped nations
300

What is the name of the international treaty aimed at reversing the thinning of the ozone layer?

Double Points: Name one country that does not participate in this treaty.

The Montreal Protocol - all countries participate!

300

How many seconds will it take for a mystery element to decrease from 80 g to 5 g if the half life is 2 seconds?

8 seconds

300

What contributes to seasons on earth?

axis tilt and solar radiation

400

What two alternative energy types can negatively impact wildlife migration?

wind turbines and hydroelectric dams

400

Describe one way increased global temperatures can result in human fatalities (don't say heat stroke)

increased spread of disease from vectors, access to food, loss of shelter, increased extreme weather events
400

What type of radiation is absorbed by stratospheric ozone?

Ultraviolet

400

An ice core sample has 1/16 of the original mass of Js-52. If the half life of the sample is 500 years, how old is the sample?

1,500 years

400

List two reactants in the formation of tropospheric ozone or photochemical smog

VOCs, NOxs, sunlight, oxygen

500

Describe one ineffective or harmful location for a wind farm?

on a bird/bat migration route, in a residential area (noise pollution), a place with little wind

500

What greenhouse gas does not significantly contribute to global warming and why?

H2O it has a short residence time in the atmosphere

500

What would be one possible impact of ozone thinning?

increased cancer rates, increased cataracts

500
A substance initially had 100 g and was reduced to 6.25 g in 16 years. How long is the substance's half life?

4 years

500

What kind of ecosystem services are the following (provisioning, cultural, supporting, or regulating)

1. Corals prevent coastal erosion

2. National parks provide camping opportunities

3. Logging of forests provide wood for building

1. regulating

2. cultural

3. provisioning

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