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?
- Photosynthesis
- Burning fuels
- Respiration
- Dissolving in water
Decomposers break down fallen leaves and give off carbon dioxide. In the diagram, which process is arrow X, Bo?
- Dissolving
- Burning
- Photosynthesis
- Decay
Which way does the photosynthesis arrow move carbon, Jun?
- From the air into the plants
- From the soil into the air
- From the plants into the soil
- From the plants into the air
Which way does the burning arrow move carbon, Kira?
- From the air into the fossil fuels
- From the fossil fuels into the air
- From the air into the plants
- From the plants into the fuels
Which way does the decay arrow move carbon, Luz?
- From the decomposers into the plants
- From the air into the decomposers
- From the air into the plants
- From the decomposers into the air
An apple tree grows a lot of new wood and fruit. Where did most of that carbon come from, Noah?
- The water it takes in
- Sunlight
- Carbon dioxide in the air
- The soil around its roots
Coal, oil and gas hold carbon. Where did that carbon first come from, Pia?
- Rain stored underground
- Ancient plants
- Sunlight turned into rock
- Soil deep 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
- Back into the air as carbon dioxide
- It turns into energy and is gone
- Nowhere: it is used up
A maple leaf falls in autumn and lands on the forest floor. Which box gets its carbon next, Tala?
- Decomposers
- The carbon vanishes
- The Sun
- Fossil fuels, right away
A carrot plant grows a big orange root. Where did the root's carbon come from, Zee?
- Water in the ground
- Carbon dioxide taken in by the leaves
- Nowhere: plants make new carbon
- The soil around the root