Why did Charles Keeling choose Mauna Loa to measure atmospheric CO2 levels?

Its altitude and isolation from pollution sources made it ideal for measuring global CO2 levels.

It was the most polluted site, ideal for studying extreme pollution.

It was close to industrial centers, providing data on maximum possible pollution.

He lived nearby and had easy access to the site.

What trend did Charles Keeling observe in CO2 levels over the years?

CO2 levels increased annually, with higher levels in winter and lower in summer.ver decades.

CO2 levels decreased each year.

CO2 levels showed no significant change

CO2 levels remained constant year-round.

What is the relationship between greenhouse gases and global temperature according to most scientists?

Increased greenhouse gases are expected to increase global temperature.

Increased greenhouse gases have no effect on global temperature.

Increased greenhouse gases are expected to decrease global temperature.

The relationship is random and unpredictable.

The graph below shows CO2 emissions and temperatures from 1909 to 1949. What conclusion is best supported by the graph?

As carbon dioxide concentrations increase, temperatures increase

There is no relationship between carbon dioxide concentrations and temperatures

As carbon dioxide concentrations increase, temperatures decrease

As carbon dioxide concentrations decrease, temperatures increase

What role does Earth's atmosphere play during the day?

Blocks harmful sun rays and traps heat

It warms the surface by trapping sunlight

Reflects all the sunlight back to space

Causes extreme temperature variations

Why are carbon dioxide and methane effective at absorbing infrared radiation?

Their electrically-lopsided vibrations

Why does the moon experience more extreme temperatures than Earth?

Due to its closer proximity to the sun

What do some scientists believe about the warming observed on Earth?

It is part of natural climatic variability.

It is entirely due to human activities.

It is an irreversible process that cannot be mitigated.

It is a temporary phenomenon that will soon reverse.

What could be a potential consequence of a global temperature increase?

Melting of polar ice, leading to rising sea levels.

A decrease in sea levels due to increased ice formation.

A global decrease in hurricane and typhoon frequency.

Increased global water reserves due to higher rainfall.

What health issues might arise due to global warming?

Increase in heat-related deaths and respiratory illnesses.

Decrease in respiratory illnesses.

Fewer heat-related deaths due to adaptation.

Decreased incidence of diseases carried by mosquitoes.

How is agriculture expected to be impacted by global warming?

Decreased crop yields due to higher temperatures and more frequent droughts.

Improved crop yields due to higher temperatures.

Increased crop diversity due to warmer climates.

Stable crop yields with minor fluctuations.

Resource Library

Science

Earth & Space Science

Global Warming

4.7 Greenhouse Gases & Global Warming

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Science

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9th - 12th Grade

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Practice Problem

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NGSS

HS-ESS3-5, HS-ESS2-4, HS-PS4-3

Standards-aligned

Christopher Kesterson

Used 5+ times

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43 questions

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What best describes the greenhouse effect?

The trapping of the sun’s warmth in the Earth’s lower atmosphere due to the greater transparency of the atmosphere to visible radiation from the sun than to infrared radiation emitted from the planet's surface.

The reflection of sunlight by the Earth's atmosphere, preventing heat from reaching the planet.

The warming of the Earth's surface and the air above it by pollutants.

The reduction of the sun's heat by the Earth's atmosphere.

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