Questão 1
Questão
Small changes in earth’s orbit and periodic changes in the sun’s energy aren’t enough to have caused significant climate changes in the past.
Questão 2
Questão
Gases such as argon, carbon dioxide, water vapour and methane make up a tiny percentage of the air and don’t play an important role in regulating our climate.
Questão 3
Questão
The troposphere is a layer of the atmosphere that is closest to the earth’s surface and has a large impact on climate.
Questão 4
Questão
The saltwater oceans don’t impact the earth’s climate in a significant way because freshwater is more abundant.
Questão 5
Questão
Most of the hydrosphere is composed of freshwater.
Questão 6
Questão
The main greenhouse gases—such as carbon dioxide, methane, and water vapour—naturally occur in the atmosphere at very low levels.
Questão 7
Questão
Heat transfer without a medium: [blank_start]radiation[blank_end]
Heat transfer in a gas or liquid: [blank_start]convection[blank_end]
Heat transfer in a metal rod: [blank_start]conduction[blank_end]
Colour that absorbs a large amount of heat: [blank_start]black[blank_end]
Colour that reflects a large amount of heat: [blank_start]white[blank_end]
Responda
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radiation
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convection
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conduction
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black
-
white
Questão 8
Questão
The greenhouse effect is a naturally occurring process and is necessary for life on Earth, so it can’t be a problem.
Questão 9
Questão
The greenhouse effect occurs because the ultraviolet radiation cannot escape Earth’s atmosphere and warms the planet further.
Questão 10
Questão
When the earth absorbs the sun’s radiant energy, it is transformed into heat energy, warming the planet.
Questão 11
Questão
It would be better if we could get rid of all carbon dioxide.
Questão 12
Questão
Nitrogen and Ozone are greenhouse gases.
Questão 13
Questão
Most of our atmosphere consists of nitrogen and oxygen.
Questão 14
Questão
The production and burning of fossil fuels like coal and oil are significant contributors to the production of greenhouse gases.