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Evolution of Earth

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29 Questions

What has been responsible for the careful removal of CO2 from the atmosphere over billions of years?

Oil, natural gas, and coal formations

What has caused the increased concentration of CO2 in the atmosphere, leading to global warming?

Humans digging up and burning carbon sources

What has recent evidence conclusively shown about the levels of CO2 added to the atmosphere since 1800?

They have been almost entirely due to human pollution

What has the Earth's climate been doing for the majority of the last 1,000 years, according to the text?

Cooling

What has reversed the Earth's cooling trend of the last 1,000 years, according to the text?

Human intervention, mainly in the 20th century

What is the main purpose of the ozone layer mentioned in the text?

To block harmful ultraviolet (UV) rays from space

How is ozone (O3) formed in the Earth's atmosphere according to the text?

By combining two oxygen atoms

What is the primary role of carbon dioxide in relation to global warming, as explained in the text?

It traps infrared radiation, contributing to the greenhouse effect

What is one of the primary reasons for the destruction of the protective ozone layer mentioned in the text?

Chlorofluorocarbons released by human activities

Why is oxygen (O2) essential for the formation of the ozone layer according to the text?

To split into single oxygen atoms when exposed to UV rays

What was the nature of Earth's atmosphere billions of years ago?

Filled with rich amounts of carbon dioxide, nitrogen, and water vapor

What process helped remove the excessive levels of carbon dioxide from the ancient Earth's atmosphere?

Dissolution of carbon dioxide in water and formation of limestone

What was a major difference between the ancient Earth and the Earth we know today?

The ancient Earth was inhospitable and deadly

What was a key factor that led to the change in Earth's atmosphere over time?

Reduction in volcanic activity

What was a key factor that led to the change in Earth's atmosphere over time?

The appearance of photosynthetic plants in large numbers

How did the ancient Earth's atmosphere differ from the Earth's atmosphere today?

It contained more carbon dioxide and less oxygen

What process helped remove the excessive levels of carbon dioxide from the ancient Earth's atmosphere?

Both (b) and (c)

What was a major difference between the ancient Earth and the Earth we know today?

The ancient Earth had higher levels of radiation

What has been responsible for the careful removal of CO2 from the atmosphere over billions of years?

The formation of limestone in the oceans

What happens when the sun's ultraviolet radiation reaches the Earth's surface?

It is reflected back into space.

What is the main function of the ozone layer in the Earth's atmosphere?

To block ultraviolet rays

How do chlorofluorocarbons contribute to the destruction of the ozone layer?

By reverting ozone back into oxygen

What would happen if there was no greenhouse effect on Earth?

The Earth would be significantly warmer.

How does carbon dioxide contribute to global warming?

By absorbing infrared radiation

What has been the primary cause of the increased concentration of CO2 in the atmosphere leading to global warming?

Human pollution and the burning of carbon sources

What does the text indicate has been the trend in the Earth's climate for the majority of the last 1,000 years?

Cooling

What has been the primary process responsible for the careful removal of CO2 from the Earth's atmosphere over billions of years?

Storage in oil, natural gas, and coal deposits

What does the text suggest has been the primary role of CO2 in relation to global warming?

CO2 absorbs heat from the sun, causing the greenhouse effect

What has the text indicated is the primary reason for the reversal of the Earth's cooling trend over the last 1,000 years?

Human intervention and pollution, mainly in the 20th century

Explore the transformation of Earth from its inhospitable and deadly ancient past to the beautiful and life-giving planet we call home today. Learn about the conditions on Earth billions of years ago during its formation and how it has changed over time.

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