What common household item contains the most stored carbon?
Wooden furniture
Plastic toys
Paper products
Cotton clothes
Which natural process removes the most carbon dioxide from the atmosphere?
Photosynthesis
Ocean absorption
Rock weathering
Volcanic activity
How many years can a carbon atom spend in the ocean before returning to the atmosphere?
100 years
1,000 years
10,000 years
100,000 years
Which everyday human activity releases the most carbon dioxide?
Driving cars
Using electricity
Breathing
Cooking
What color are plants that don't contain chlorophyll and can't perform photosynthesis?
White
Brown
Black
Red
How much carbon dioxide does an average tree absorb per year?
48 pounds
13 pounds
100 pounds
25 pounds
What percentage of Earth's carbon is stored in rocks?
0.999
0.5
0.75
0.25
How many trees would it take to offset one person's annual carbon emissions?
50 trees
100 trees
500 trees
1000 trees
What percentage of Earth's atmosphere is made up of carbon dioxide (CO2)?
0.0004
0.01
0.05
0.1
How much of the world's carbon dioxide emissions come from human breathing?
0.01
0.03
0.05
0.07
Which ocean contains the most dissolved carbon?
Pacific Ocean
Atlantic Ocean
Indian Ocean
Arctic Ocean
How many pounds of oxygen does one acre of trees produce in a year?
2,000 pounds
5,000 pounds
8,000 pounds
10,000 pounds
What color is chlorophyll, the pigment responsible for photosynthesis?
Green
Red
Blue
Yellow
How many years does it take for a carbon atom to complete one cycle?
100-500 years
500-1000 years
1000-2000 years
2000-5000 years
What percentage of Earth's biomass is made up of plants?
0.8
0.85
0.9
0.95
How much carbon dioxide does the average car emit per mile?
404 grams
202 grams
606 grams
808 grams
Which animal contributes most to the carbon cycle through respiration?
Termites
Humans
Cattle
Whales
How many trees are planted globally each year?
1.9 billion
2.9 billion
3.9 billion
4.9 billion
What percentage of Earth's oxygen is produced by ocean phytoplankton?
0.5
0.6
0.7
0.8
How many years can carbon remain trapped in fossil fuels?
Millions of years
Thousands of years
Hundreds of years
Decades
