7.3.5 Global Warming

What is global warming?

The fact that the temperature around the world is increasing due to more greenhouse gases being produced.

Which gases are the main contributors to global warming?

Carbon dioxide (CO₂) and methane (CH₄).

How do greenhouse gases cause global warming?

They trap more heat by absorbing and reflecting it back to Earth, heating it up.

What is one consequence of melting ice caps?

Reduced habitats for animals such as polar bears.

How does rising sea level affect habitats?

Low-lying areas are flooded with salty water, reducing habitats.

How do changes in temperature and rainfall affect species distribution?

They affect migration and survival, as some species may no longer survive in their usual habitats.

What can happen to organisms if their habitats are lost?

They may become extinct, reducing biodiversity.