Let's solve the worksheet step by step using the
word bank and the information provided in the image.
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PHOTOSYNTHESIS Worksheet – Completed & Explained
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1. Sunlight is a good source of _________.
✔ Answer: Energy
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✔ Explanation: Sunlight provides the energy needed for photosynthesis. Plants use this light energy to convert carbon dioxide and water into glucose (food) and oxygen.
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2. Trees and plants make their food from _________.
✔ Answer: Sunlight, carbon dioxide, and water
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✔ Explanation: The process of photosynthesis uses sunlight, carbon dioxide (from air), and water (from soil) to produce glucose (sugar) and oxygen. This is shown in the diagram at the top.
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3. _________ is a Greek word for 'light' and _________ is a Greek word for 'putting together'. Now...it's simple! _________ is using light to 'put things together'. Plants use this process to make their food with the help of SUNLIGHT, ___________, and ___________.
✔ Answers:
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Photo is a Greek word for 'light'
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Synthesis is a Greek word for 'putting together'
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Photosynthesis is using light to 'put things together'
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Carbon dioxide and
Water
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✔ Explanation:
> - "Photo" = light
> - "Synthesis" = putting together
> - Together, they form
photosynthesis, which means "putting together with light"
> - The three inputs are:
sunlight,
carbon dioxide, and
water
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4. Plants have tiny openings called the STOMATA present in their leaves through which they take in _________ and give out _________. They also use WATER and other nutrients to make FOOD which is absorbed by their _________.
✔ Answers:
- Take in:
Carbon dioxide
- Give out:
Oxygen
- Absorbed by:
Roots
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✔ Explanation:
> - Stomata allow gas exchange: CO₂ enters, O₂ exits.
> - Water is absorbed by the
roots from the soil and transported up to the leaves.
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5. The LEAVES contain tiny pigments called _________. These pigments take in CARBON DIOXIDE, WATER and _________ and turn them into SUGAR and _________. The SUGAR is then used by the plants as their _________ and the _________ is given out into the atmosphere. This process as a whole is called _________.
✔ Answers:
- Pigments:
Chlorophyll
- Inputs:
Sunlight
- Outputs:
Oxygen
- Sugar used as:
Food
- Released:
Oxygen
- Process:
Photosynthesis
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✔ Explanation:
> -
Chlorophyll is the green pigment in leaves that captures light energy.
> - It uses
sunlight,
CO₂, and
water to produce
glucose (sugar) and
oxygen.
> - The sugar is used as
food for the plant’s growth and energy.
> -
Oxygen is released into the air as a byproduct.
> - The entire process is known as
photosynthesis.
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✔ Final Completed Answers:
1. Sunlight is a good source of
energy.
2. Trees and plants make their food from
sunlight, carbon dioxide, and water.
3.
Photo is a Greek word for 'light' and
synthesis is a Greek word for 'putting together'. Now...it's simple!
Photosynthesis is using light to 'put things together'. Plants use this process to make their food with the help of SUNLIGHT,
carbon dioxide, and
water.
4. Plants have tiny openings called the STOMATA present in their leaves through which they take in
carbon dioxide and give out
oxygen. They also use WATER and other nutrients to make FOOD which is absorbed by their
roots.
5. The LEAVES contain tiny pigments called
chlorophyll. These pigments take in CARBON DIOXIDE, WATER and
sunlight and turn them into SUGAR and
oxygen. The SUGAR is then used by the plants as their
food and the
oxygen is given out into the atmosphere. This process as a whole is called
photosynthesis.
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🌱 Summary of Photosynthesis:
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6CO₂ + 6H₂O + Light Energy → C₆H₁₂O₆ (Glucose) + 6O₂
This equation shows how plants convert raw materials into food and oxygen using sunlight.
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Let me know if you'd like this turned into a printable version or need a simplified explanation for younger students!
Parent Tip: Review the logic above to help your child master the concept of photosynthesis worksheet 7th grade.
