What is Global Warming?

Questions and Answers

The rising of sea levels

The ozone layer depletion

The greenhouse effect (correct)

The melting of polar ice caps

To reflect sunlight away from the Earth

To absorb and retain heat in the atmosphere (correct)

To create holes in the ozone layer

To reduce the Earth's temperature

Human activities (correct)

Changes in the Earth's orbit

Volcanic eruptions

Natural changes in the Earth's climate

Carbon dioxide Signup and view all the answers

The greenhouse effect Signup and view all the answers

It is released into the atmosphere Signup and view all the answers

They struggle to survive in the warmer weather Signup and view all the answers

They have less area to hunt Signup and view all the answers

When a specific plant or animal is no longer on the Earth Signup and view all the answers

It is taken over by other plants that thrive in warmer weather Signup and view all the answers

Study Notes

Global warming is a process that causes the average temperature on Earth to increase or warm up.

The Earth is covered with an invisible blanket called the atmosphere.
The atmosphere reflects some of the sun's heat away from Earth, while absorbing others.
Gases like carbon dioxide (CO2) and methane (CH4) help keep the heat in the atmosphere through the greenhouse effect.

Most scientists believe that human activities are the main cause of global warming.
Human activities that contribute to global warming include:
- Burning fossil fuels (e.g., in factories, cars) which releases carbon dioxide into the atmosphere.
- Deforestation, which reduces the number of trees that absorb carbon dioxide.

Increased temperatures cause some plants to struggle to survive, leading to changes in habitats.
Some plants that are adapted to warmer weather take over habitats, threatening the survival of other plants and animals.
The increase in heat is causing:
- Polar ice caps to melt, affecting polar bears' habitats and hunting abilities.
- Decrease in polar bear population, potentially leading to extinction.