Here is the completed worksheet with explanations for each answer:
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1. Sunlight is a good source of _ENERGY_
✔ Explanation: Plants use sunlight as their primary energy source to power photosynthesis. The sun’s light energy is converted into chemical energy (stored in sugar).
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2. Trees and plants make their food from _SUNLIGHT, CARBON DIOXIDE, and WATER_
✔ Explanation: These are the three essential ingredients for photosynthesis. As shown in the diagram:
> Sunlight + Carbon dioxide + Water → Glucose (sugar) + Oxygen
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**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_.**
✔ Explanation:
- “Photo” comes from Greek *phos* meaning “light”.
- “Synthesis” comes from Greek *syn* (together) + *tithenai* (to put).
So “photosynthesis” literally means “putting together with light.”
The inputs are clearly stated in the diagram: 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 _CARBON DIOXIDE_ and give out _OXYGEN_.
They also use WATER and other nutrients to make FOOD which is absorbed by their _ROOTS_.**
✔ Explanation:
- Stomata are microscopic pores on leaves that allow gas exchange: CO₂ enters, O₂ exits.
- Roots absorb water and minerals from the soil, which travel up to the leaves via the stem.
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**5. The LEAVES contain tiny pigments called _CHLOROPLASTS_.
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_**
✔ Explanation:
- Chloroplasts are organelles in plant cells containing chlorophyll — the green pigment that captures sunlight.
- Using sunlight, CO₂, and H₂O, chloroplasts produce glucose (sugar) for energy/food and release oxygen as a byproduct.
- This entire chemical process is named
photosynthesis.
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✔ Final Answers Summary:
1.
ENERGY
2.
SUNLIGHT, CARBON DIOXIDE, and WATER
3.
PHOTO,
SYNTHESIS,
PHOTOSYNTHESIS,
CARBON DIOXIDE,
WATER
4.
CARBON DIOXIDE,
OXYGEN,
ROOTS
5.
CHLOROPLASTS,
SUNLIGHT,
OXYGEN,
FOOD,
OXYGEN,
PHOTOSYNTHESIS
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This worksheet teaches the core concept of
photosynthesis — how plants convert light energy into chemical energy to make their own food. It also reinforces vocabulary, Greek roots, and plant anatomy (stomata, roots, chloroplasts). Great for elementary or middle school science! 🌞🌱
Parent Tip: Review the logic above to help your child master the concept of photosynthesis worksheet pdf.
