ch9-the atmosphere

Question 1

how are oxides of nitrogen produced in a car engine

Answer 1

high temperatures
enable oxygen and nitrogen to react

Question 2

how has the percentage of nitrogen changed today from the early atmosphere

Answer 2

nitrogen increased because volcanoes produce nitrogen and because bacteria produce nitrogen

Question 3

give one reason why the amount of carbon dioxide in the early atmosphere decreased

Answer 3

limestone formation from carbonates

Question 4

describe the greenhouse effect

Answer 4

short wavelength radiation
passes through atmosphere to Earth’s surface
Earth’s surface radiates different wavelengths
which are absorbed by greenhouses gases creating a temperature increases

Question 5

describe the greenhouse effect

Answer 5

short wavelength radiation
passes through atmosphere to Earth’s surface
Earth’s surface radiates different wavelengths
which are absorbed by greenhouses gases creating a temperature increases

Question 6

give effects of global climate change

Answer 6

rising sea levels
melting ice caps
loss of habitats
more extreme weather events

Question 7

how has the percentage of oxygen changed today from the early atmosphere?

Answer 7

oxygen increased as algae and plants produced oxygen by photosynthesis

Question 8

how has the percentage of carbon dioxide changed today from the early atmosphere?

Answer 8

carbon dioxide decreased because algae and plants used carbon dioxide by photosynthesis and because oceans formed and dissolved in the water

Question 9

what is sustainable development?

Answer 9

meet needs of current generations without compromising needs of future generations