GCSE Biology - Global Warming & Climate Change #91

The video explains the Earth's atmosphere and its role in maintaining a stable temperature through the greenhouse effect. It highlights the impact of greenhouse gases like carbon dioxide and methane on global warming. The video also discusses climate change, its effects on weather patterns, sea levels, and biodiversity, emphasizing the urgent need for action to mitigate these changes.

What is one of the main functions of Earth's atmosphere?

• To provide oxygen for breathing

• To generate weather patterns

• To act as an insulating blanket

• To reflect sunlight away from Earth

How does the atmosphere help maintain Earth's temperature?

• By absorbing all sunlight

• By reflecting all heat back to space

• By absorbing and re-emitting heat energy

• By blocking all radiation from the sun

Which gases are primarily responsible for the greenhouse effect?

• Argon and krypton

• Helium and neon

• Carbon dioxide and methane

• Oxygen and nitrogen

What has caused the recent increase in the greenhouse effect?

• Human activities releasing greenhouse gases

• Increased volcanic activity

• Changes in solar radiation

• Natural fluctuations in Earth's orbit

What is a major consequence of global warming?

• Expansion of polar ice caps

• Decreased sea levels

• More stable weather patterns

• Increased frequency of extreme weather events

How does global warming contribute to sea level rise?

• By increasing rainfall

• By increasing ocean currents

• By decreasing ocean salinity

• By causing more ice to melt and water to expand

What impact does climate change have on biodiversity?

• It causes species to adapt or migrate

• It has no impact on wildlife

• It stabilizes ecosystems

• It increases species diversity