Human Impact - Unit 5

Front

What are greenhouse gases?

Back

Gases in the Earth's atmosphere that trap heat, contributing to the greenhouse effect. Examples include carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O).

Front

Why are greenhouse gases important for the environment?

Back

They help maintain the Earth's temperature by trapping heat, but excessive amounts can lead to global warming.

Front

What is global warming?

Back

The long-term increase in Earth's average surface temperature due to human activities, primarily the burning of fossil fuels.

Front

What is deforestation?

Back

The clearing of trees; transforming a forest into cleared land, which can lead to loss of biodiversity and increased carbon emissions.

Front

How does deforestation impact the environment?

Back

It reduces the number of trees that absorb CO2, leading to higher levels of greenhouse gases in the atmosphere.

Front

What causes sea levels to rise?

Back

Melting glaciers and ice caps due to global warming, along with thermal expansion of seawater as it warms.

Front

What human activity releases the most greenhouse gas emissions?

Back

Power stations, particularly those that burn fossil fuels for electricity.

Front

What is carbon dioxide (CO2)?

Back

A colorless, odorless gas produced by burning fossil fuels and organic matter; it is a significant greenhouse gas.

Front

Is any amount of CO2 in the atmosphere bad for our planet?

Back

False. While CO2 is a greenhouse gas, it is naturally present in the atmosphere and is essential for plant photosynthesis.

Front

What is the greenhouse effect?

Back

The process by which certain gases trap heat in the Earth's atmosphere, keeping the planet warm enough to support life.