Everyday Science

Greenhouse Effect & Global Warming MCQs With Answer

The greenhouse effect is caused by the trapping of:
a) Oxygen in the atmosphere
b) Sunlight in the ocean
c) Heat by greenhouse gases
d) Cold air in the polar regions

Which gas is the major contributor to the greenhouse effect?
a) Oxygen
b) Nitrogen
c) Carbon dioxide
d) Helium

Which human activity is the largest source of carbon dioxide emissions?
a) Deforestation
b) Industrial waste disposal
c) Burning fossil fuels
d) Agricultural irrigation

Which greenhouse gas is released by livestock farming?
a) Methane
b) Oxygen
c) Carbon monoxide
d) Ozone

What is the main cause of global warming?
a) Increased volcanic activity
b) Natural changes in the Earth’s orbit
c) Human activities increasing greenhouse gases
d) Decrease in solar radiation

Which layer of the atmosphere contains greenhouse gases?
a) Troposphere
b) Stratosphere
c) Mesosphere
d) Thermosphere

Which gas has the highest global warming potential?
a) Carbon dioxide
b) Methane
c) Nitrous oxide
d) Fluorinated gases

Which of the following is NOT a greenhouse gas?
a) Nitrogen
b) Carbon dioxide
c) Methane
d) Water vapor

What is the primary effect of global warming?
a) Decreased sea levels
b) Increased agricultural productivity
c) Rising global temperatures
d) Expansion of polar ice caps

Which international agreement aims to reduce greenhouse gas emissions?
a) Kyoto Protocol
b) NAFTA
c) Bretton Woods Agreement
d) Warsaw Pact

Which phenomenon results from global warming?
a) Increased snowfall
b) More frequent hurricanes
c) Expansion of deserts
d) Slower melting of glaciers

What is the main effect of ocean acidification caused by global warming?
a) Increased oxygen levels in water
b) Coral bleaching and marine life death
c) Decreased water temperature
d) Rapid growth of seaweed

Which of these human actions helps reduce global warming?
a) Cutting down forests
b) Using fossil fuels
c) Planting more trees
d) Increasing industrial emissions

Which of these is a renewable energy source that helps reduce global warming?
a) Coal
b) Natural gas
c) Solar energy
d) Petroleum

What effect does deforestation have on global warming?
a) Reduces CO₂ levels
b) Increases CO₂ levels
c) Has no effect on the atmosphere
d) Decreases oxygen levels but does not affect CO₂

Which sector contributes the most to global warming?
a) Transportation
b) Agriculture
c) Energy production
d) Forestry

Which gas contributes to both global warming and ozone depletion?
a) Carbon dioxide
b) Chlorofluorocarbons (CFCs)
c) Hydrogen sulfide
d) Nitrogen gas

How does global warming affect weather patterns?
a) More stable climates
b) Less extreme weather
c) Increased frequency of heatwaves and storms
d) Decrease in global temperatures

Which of these is an effect of melting ice caps due to global warming?
a) Decrease in global sea levels
b) Increase in global sea levels
c) More snowfall in polar regions
d) Less water evaporation

Which of these is a possible long-term consequence of global warming?
a) Expansion of tropical forests
b) Slower desertification
c) Mass extinction of species
d) Increased polar ice caps

How does carbon capture technology help combat global warming?
a) Increases CO₂ emissions
b) Removes CO₂ from the atmosphere
c) Prevents the formation of ozone layer
d) Increases methane levels

Which human activity contributes the most to deforestation?
a) Hydroelectric power
b) Urbanization and agriculture
c) Wind power
d) Recycling efforts

How does afforestation help reduce global warming?
a) Increases CO₂ levels
b) Absorbs CO₂ from the air
c) Releases methane
d) Generates more industrial waste

What is the purpose of the Paris Agreement?
a) Promote nuclear energy
b) Reduce global poverty
c) Combat climate change
d) Increase fossil fuel production

Which renewable energy source is NOT derived from the sun?
a) Wind energy
b) Geothermal energy
c) Hydroelectric power
d) Solar energy

Which of these gases has the longest atmospheric lifetime?
a) Carbon dioxide
b) Methane
c) Nitrous oxide
d) Water vapor

Which greenhouse gas is primarily produced from agricultural fertilizers?
a) Carbon dioxide
b) Methane
c) Nitrous oxide
d) Ozone

How does ocean circulation impact global warming?
a) It has no effect
b) Helps distribute heat globally
c) Reduces CO₂ in the atmosphere
d) Increases greenhouse gas emissions

What is the main reason for increased wildfires in recent years?
a) Increased rainfall
b) Higher global temperatures and dry conditions
c) Increased tree plantations
d) Reduction in fossil fuel use

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