How carbon moves through living things and the air
Grade 7 Science Worksheet - Building Confidence
Circle the best answer.
In the diagram, which process does arrow X stand for, Ari?
- Respiration
- Dissolving in water
- Burning fuels
- Photosynthesis
Decomposers break down fallen leaves and give off carbon dioxide. In the diagram, which process is arrow X, Bo?
- Photosynthesis
- Dissolving
- Burning
- Decay
Animals breathe out carbon dioxide. In the diagram, which process is arrow X, Esme?
- Respiration
- Decay
- Burning
- Photosynthesis
Which way does the photosynthesis arrow move carbon, Jun?
- From the soil into the air
- From the air into the plants
- From the plants into the soil
- From the plants into the air
Which way does the decay arrow move carbon, Luz?
- From the air into the plants
- From the air into the decomposers
- From the decomposers into the air
- From the decomposers into the plants
In the air box, which form is the carbon in, Milo?
- Sugar in plant cells
- Coal in the ground
- Soil on the forest floor
- Carbon dioxide gas
Coal, oil and gas hold carbon. Where did that carbon first come from, Pia?
- Soil deep underground
- Sunlight turned into rock
- Ancient plants
- Rain stored underground
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
- Back into the air as carbon dioxide
- Nowhere: it is used up
A maple leaf falls in autumn and lands on the forest floor. Which box gets its carbon next, Tala?
- The carbon vanishes
- Fossil fuels, right away
- Decomposers
- The Sun
A carrot plant grows a big orange root. Where did the root's carbon come from, Zee?
- Carbon dioxide taken in by the leaves
- Water in the ground
- Nowhere: plants make new carbon
- The soil around the root