Global warming

What is Global Warming?

• Increasing temperature in Earth's atmosphere

• Decreasing temperature in a city

• Increasing rain rates in Earth

• Decreasing temperature rates

The main human activity that releases greenhouse gases is

• using bottled water
• burning fossil fuels
• texting on cellphones
• eating meat

Worldwide, temperatures have been increasing for more than 100 years.  Is this evidence of global warming?

• yes
• no

Why are too many greenhouse gases bad for the environment?

• They cause trees to die.

• They release heat and will be the cause of the next ice age.

• They trap heat in our atmosphere causing the planet to warm up.

• They are fossil fuels which pollute our environment.

Global Warming is MAINLY caused by...

• ...the Sun

• ...the Greenhouse Effect.

Recycling, saving energy and using bicycles instead of cars can help reduce Global Warming.

• True

• False

Why does cutting down trees increase global warming?

• trees soak up carbon dioxide
• trees provide shade which counteracts global warming
• trees absorbs the sun's energy without radiating back into the atmosphere
• trees drain greenhouse gases like methane from soil

What happens to the temperature if more greenhouse gases are released into the atmosphere?

• Temperature goes up
• Temperature goes down

How is the greenhouse effect produced?

• When solar energy trespasses the atmosphere.

• When some energy is reflected back to earth.

• When the green house is burned.

• When the sun doesn't emit radiation.

What are the three main types of greenhouse gases?

• Water vapor, methane, carbon dioxide

• oxygen, methane, carbon dioxide