7.2 Notes

What does the stability of climate depend on?

• The geographical location

• The time frame considered

• The amount of rainfall

• The type of vegetation

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Over what time scales do we usually expect little climate change?

• Days and weeks

• Months and years

• Centuries and millennia

• A human lifetime

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What is the current question regarding climate stability?

• How to measure climate change

• Whether climate change is beneficial

• Whether expecting little change is reasonable

• How to prevent climate change

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If climate shifts, what are the two main concerns mentioned?

• The speed of change and its impact on environmental systems

• The increase in temperature and sea levels

• The effect on wildlife and plant species

• The economic cost and political implications

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What do ice cores tell us about?

• Ocean currents

• Climate history

• Animal migration

• Plant growth

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Where do yearly snows slowly accumulate over the centuries?

• Deserts

• Tropical forests

• Greenland and Antarctica

• Urban areas

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What remains in the ice after new layers compress lower layers?

• Large rocks

• Tiny air bubbles

• Water droplets

• Sand particles

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What do the tiny air bubbles in ice cores represent?

• Samples of ocean water

• Samples of the atmosphere

• Samples of soil

• Samples of plant life

How do climatologists extract information about past atmospheres?

• By studying tree rings

• By analyzing soil samples

• By drilling into ice sheets

• By observing animal behavior

What does the graph titled "The Correlation Between Historic CO₂ Levels and Historic Temperatures" primarily show?

• The relationship between CO₂ levels and global population growth.

• The correlation between CO₂ levels and historic temperatures.

• The impact of CO₂ levels on ocean currents.

• The effect of CO₂ levels on plant growth.

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