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WorksheetsThe Carbon Cycle
Total questions: 20
Worksheet time: 56mins
Ethan, Luna, and Charlotte are studying the carbon cycle for their science project. They are particularly interested in understanding how carbon enters the atmosphere. Can you help them?
burning of fossil fuels & biomass
decomposition
diffusion from oceans
volcanic eruptions
cellular respiration from living things
How does carbon leave the atmosphere?
photosynthesis
cellular respiration
diffusion into the ocean
burning matter
Human activity can increase the amount of atmospheric CO2, usually through the burning of fossil fuels. This contributes to the greenhouse effect and global warming. There are no natural processes that can off-set this increased amount of carbon dioxide. What are three things HUMANS can do specifically to decrease the amount of atmospheric CO2? (3 pts)
Carbon dioxide is absorbed by producers to make (a) in photosynthesis.
Benjamin, Abigail, and Isla are discussing ways to reduce their carbon footprint. Which of the following actions, if taken by one of them, would not add CO2 to the atmosphere?
Benjamin cooking with gas
Abigail planting trees
Isla burning wood
Abigail riding in a bus
Combustion is another word for (a)
Too much carbon dioxide in the atmosphere causes climate change because it (a) .
Lily, Evelyn, and Sophia are studying the effects of human activities and natural events on the carbon cycle. They are particularly interested in how the burning of fossil fuels and volcanic eruptions are similar. They understand that both (a) .
(a) contributes to the greenhouse gasses by loss of trees that would otherwise remove carbon dioxide from the air.
Ava, Benjamin, and Hannah are discussing where carbon is stored on Earth. Ava thinks it's stored in trees and other living things, Benjamin believes it's in the oceans, and Hannah thinks it's underground in soil and fossil fuels. Who is correct?
Ava
Benjamin
Hannah
All are correct
Michael is studying about different processes and their impact on the environment. He learned that all of the following processes produce carbon dioxide except one. Which one does not produce carbon dioxide?
Photosynthesis performed by the plants in Priya's garden
Burning Fossil Fuels as Abigail's family does to heat their home
Animal respiration like Michael's pet dog
Decaying of plants in Michael's backyard
How do living organisms return carbon to the atmosphere in the carbon cycle?
respiration
decomposition
photosynthesis
transpiration
The carbon in grass becomes part of a lion through (a) .
(a) removes carbon from the atmosphere.
Aiden, Avery, and Abigail are having a picnic and they brought a peanut butter and jelly sandwich. How can carbon from a polar bear end up in their sandwich?
The polar bear dies, its body decomposes, and the resulting CO2 is released into the atmosphere
The polar bear inhaled CO2 from a peanut plant growing in the Artic
The polar bear eats peanut butter
CO2 from the atmosphere is absorbed by the peanut plant, which is then used to make the peanut butter
They eat the sandwich which contains peanut butter [crushed peanuts from the peanut plant]
Which choice correctly shows the gases that enter and exit plants during photosynthesis?
Enter: Oxygen
Exit: Carbon Dioxide
Enter: Carbon Dioxide
Exit: Oxygen
Enter: Water Vapor
Exit: Glucose
Enter: Light
Exit: Water Vapor
Match each scenario with what would happen to the amount of carbon in the atmosphere.
Increase
The number of trees in a park decreases over the years.
Decrease
The number of trees in a park increases over the years.
Stay the same
The number of trees in a park remains unchanged over the years.
Liam, James, and Noah were studying a graph in their environmental science class. Based on the graph, which of the following is the best conclusion they can make?
atmospheric carbon dioxide levels have been decreasing since 1960
Hawaii has a lot of carbon dioxide
humans have been working hard to decrease carbon dioxide levels
atmospheric carbon dioxide levels have increased steadily since 1960
