How carbon moves through living things and the air
Grade 7 Science Worksheet - Building Confidence
Circle the best answer.
Decomposers break down fallen leaves and give off carbon dioxide. In the diagram, which process is arrow X, Bo?
- Decay
- Burning
- Photosynthesis
- Dissolving
Animals breathe out carbon dioxide. In the diagram, which process is arrow X, Esme?
- Decay
- Burning
- Respiration
- Photosynthesis
Which way does the photosynthesis arrow move carbon, Jun?
- From the air into the plants
- From the plants into the air
- From the soil into the air
- From the plants into the soil
Which way does the burning arrow move carbon, Kira?
- From the fossil fuels into the air
- From the air into the fossil fuels
- From the plants into the fuels
- From the air into the plants
Which way does the decay arrow move carbon, Luz?
- From the decomposers into the plants
- From the air into the plants
- From the air into the decomposers
- From the decomposers into the air
In the air box, which form is the carbon in, Milo?
- Soil on the forest floor
- Sugar in plant cells
- Carbon dioxide gas
- Coal in the ground
An apple tree grows a lot of new wood and fruit. Where did most of that carbon come from, Noah?
- The soil around its roots
- Carbon dioxide in the air
- Sunlight
- The water it takes in
Coal, oil and gas hold carbon. Where did that carbon first come from, Pia?
- Soil deep underground
- Rain stored underground
- Sunlight turned into rock
- Ancient plants
A carbon atom is in an acorn's sugar. A squirrel takes in the acorn as food. Where could that carbon go next, Ren?
- Straight down into the soil to become rock
- It turns into energy and is gone
- Nowhere: it is used up
- Back into the air as carbon dioxide
A carrot plant grows a big orange root. Where did the root's carbon come from, Zee?
- The soil around the root
- Nowhere: plants make new carbon
- Carbon dioxide taken in by the leaves
- Water in the ground