QUESTION 11 \"During most of the Mesozoic Era, Earth was ________.\" about as wa

Question

QUESTION 11

"During most of the Mesozoic Era, Earth was ________."

about as warm as present

warmer than present

cooler than present

experiencing wild temperature fluctuations

0.17 points   

QUESTION 12

"As more ice in the Arctic Ocean melts, what effect does this have on the water?"

Heat absorption increases as the albedo increases

Heat absorption increases as the albedo decreases

Heat absorption decreases as albedo the decreases

There is no effect on heat absorption.

0.17 points   

QUESTION 13

The greenhouse effect is caused by ________.

"the oceans, which absorb heat from the sun"

"anthropogenic gases, which absorb heat from the sun"

"atmospheric gases, which trap heat radiated from Earth s surface"

solar energy reflected back into space by clouds

0.17 points   

QUESTION 14

The ratio of oxygen-16 and oxygen-18 isotopes in plankton fossils in deep-sea sediments can be used to determine ________.

past carbon dioxide concentrations

past temperatures

the age of fossils

water depth

0.17 points   

QUESTION 15

The primary cause of recent global warming is believed to be ________.

chemical reactions in the atmosphere that are driven by solar heat

increased levels of atmospheric pollution

increased burning of fossil fuels

depletion of the ozone layer

0.17 points   

QUESTION 16

Most industrial nations have intentionally decreased their production and use of refrigerants and other chlorofluorocarbons in the last 20 years to address the ________.

decrease in Arctic Sea ice cover

decrease in plankton fecundity in tropic and subtropical waters

"increase in hurricane, typhoon, and tropical cyclone intensity and/or number"

decrease in atmospheric ozone over the Antarctic

0.17 points   

QUESTION 17

The hole in the ozone layer has been brought about by anthropogenic emissions of ________.

carbon dioxide

methane

chlorofluorocarbons

water vapor

0.17 points   

QUESTION 18

Natural carbon sinks have generally matched the production of carbon dioxide until ________.

approximately 1900

"the end of the last ice age, approximately 16,000 years ago"

"the Little Ice Age, approximately 400 years ago"

"the Eocene Epoch, approximately 50 million years ago"

0.17 points   

QUESTION 19

"A blogger writes that global warming is not real, noting that his or her city had its coldest ever-recorded temperature last winter. The correct statement would be that the blogger is ________."

"correct, because global warming is not occurring"

"correct, because global warming is occurring only in the polar regions"

"incorrect, because the blogger is confusing weather with climate"

"incorrect, because global warming is measured only during the summer"

0.17 points   

QUESTION 20

"Models used by the Intergovernmental Panel on Climate Change show that by the year 2100, the sea level may rise by as much as ________."

10-20mm

20-60cm

10-20m

20-60m

about as warm as present

warmer than present

cooler than present

experiencing wild temperature fluctuations

Explanation / Answer

11) warmer than present

earth was warmer than today and there was no large variation between pole and equator

12)Heat absorption increases as the albedo decreases

as the ice melt, the albedo decreases and hence more heat will absorb

13)atmospheric gases, which trap heat radiated from Earth s surface

green house gases like CO2, methane, nitrous oxide will absorb the thermal radiations and act as a blanket over earth, which increases the temperature.

14)past temperatures

if the past temperature was high then it will have more O18 than O 16, because O16 will evaporate easly

15)increased burning of fossil fuels

burning of fossil fuels causes excess co2 to add the atmosphere which rises the global temperature

16)decrease in atmospheric ozone over the Antarctic

chloro fluoro carbon (CFC) deplete ozon and reduces its amount which causes to form holes on ozon layer through which ultraviolet radiations will reach earth

17)chlorofluorocarbons

CFC deplete the ozon molecules and form holes on this layes

18)approximately 1900

19)incorrect, because the blogger is confusing weather with climate

weather is a short term measurement and climate is a long term measurement

20)20-60cm

sea level will rise as a result of melting of ice and thermal expansion

Related Questions

Navigate

• Browse (All)
• Browse Q
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.