The greenhouse effect and climate change

Question 1

What does the greenhouse effect do?

• A. It reflects all sunlight back to space
• B. Greenhouse gases trap some heat, keeping Earth warm enough for life
• C. It makes holes in the atmosphere
• D. It makes oxygen

Question 2

Before 1800, carbon dioxide in the air was about 280 ppm. Recently it was about 410 ppm. By how many ppm has it risen?

Answer ppm

Question 3

Climate change: which statement is NOT true?

• A. Planting trees can help absorb carbon dioxide.
• B. A cold winter proves global warming is not happening.
• C. Global average temperatures have risen since the 1800s.
• D. Burning fossil fuels increases carbon dioxide in the atmosphere.

Question 4

Which of these is a greenhouse gas?

• A. oxygen
• B. argon
• C. methane
• D. nitrogen

Question 5

Before 1800, carbon dioxide in the air was about 280 ppm. Recently it was about 410 ppm. By how many ppm has it risen?

Answer ppm

Question 6

Climate change: which statement is NOT true?

• A. Without any greenhouse effect, Earth would be too cold for most life.
• B. Oxygen is the main greenhouse gas.
• C. Planting trees can help absorb carbon dioxide.
• D. Burning fossil fuels increases carbon dioxide in the atmosphere.

Question 7

Which is an effect of climate change?

• A. the end of all weather
• B. the Earth stopping rotating
• C. more oxygen in the air
• D. rising sea levels as ice melts and seawater expands

Question 8

Before 1800, carbon dioxide in the air was about 280 ppm. Recently it was about 410 ppm. By how many ppm has it risen?

Answer ppm

Question 9

Climate change: which statement is NOT true?

• A. A cold winter proves global warming is not happening.
• B. Burning fossil fuels increases carbon dioxide in the atmosphere.
• C. Planting trees can help absorb carbon dioxide.
• D. Global average temperatures have risen since the 1800s.

Question 10

Which of these is a greenhouse gas?

• A. oxygen
• B. methane
• C. argon
• D. nitrogen

Question 11

Before 1800, carbon dioxide in the air was about 280 parts per million (ppm). Recently it was about 400 ppm. By what percentage has it increased? Give a whole number.

Answer %

Question 12

Climate change: which statement is NOT true?

• A. Without any greenhouse effect, Earth would be too cold for most life.
• B. A cold winter proves global warming is not happening.
• C. Planting trees can help absorb carbon dioxide.
• D. Burning fossil fuels increases carbon dioxide in the atmosphere.

Question 13

What is the main cause of the recent rise in global temperatures?

• A. the Moon moving closer
• B. the Sun getting much hotter
• C. volcanoes only
• D. human activities adding greenhouse gases, especially by burning fossil fuels

Question 14

Before 1800, carbon dioxide in the air was about 280 ppm. Recently it was about 410 ppm. By how many ppm has it risen?

Answer ppm

Question 15

Climate change: which statement is NOT true?

• A. Burning fossil fuels increases carbon dioxide in the atmosphere.
• B. Oxygen is the main greenhouse gas.
• C. Without any greenhouse effect, Earth would be too cold for most life.
• D. Global average temperatures have risen since the 1800s.

Question 16

What does the greenhouse effect do?

• A. Greenhouse gases trap some heat, keeping Earth warm enough for life
• B. It reflects all sunlight back to space
• C. It makes oxygen
• D. It makes holes in the atmosphere