Final Answer:
The completed worksheet should have the following answers filled in:
1. The two main gases in the atmosphere are
nitrogen and
oxygen.
2. Photosynthesis uses carbon dioxide and water to produce
glucose and
oxygen, and stores energy from
sunlight.
3. Cellular respiration uses
glucose and
oxygen to produce carbon dioxide, water, and
energy (ATP).
4. In the carbon cycle, carbon moves between the atmosphere, living things, and the Earth’s crust through processes like
photosynthesis,
respiration,
decomposition, and
combustion.
5. Fossil fuels (coal, oil, natural gas) formed from ancient buried
plants and animals over millions of years.
6. Burning fossil fuels releases stored carbon as
carbon dioxide, increasing atmospheric CO₂.
7. Too much CO₂ contributes to the
greenhouse effect, leading to
global warming.
8. One way humans can reduce CO₂ emissions is by using
renewable energy (e.g., solar, wind) instead of fossil fuels.
9. A simple diagram would show:
- Plants take in CO₂ → make glucose (photosynthesis)
- Animals eat plants → use glucose for energy (respiration) → release CO₂
- Dead organisms → decompose or become fossil fuels
- Fossil fuels burned → release CO₂ back to air
(Exact wording may vary slightly depending on textbook phrasing, but these are the scientifically correct concepts.)
Parent Tip: Review the logic above to help your child master the concept of integrated science cycles worksheet answers.
