Photosynthesis Vs. Cellular Respiration worksheet - Free Printable

Let’s solve this step by step.

We are given a paragraph with blanks and a word box. We need to fill in the blanks using the correct words from the box.

Word Box:
- Oxygen
- Sunlight
- Glucose
- Photosynthesis
- Chloroplast
- Water
- Chlorophyll
- Carbon dioxide

Now, let’s go sentence by sentence:

1. “__________ is the process by which plants produce their own food...”
→ The process is called Photosynthesis. That’s the name of the whole thing.

2. “...in the presence of __________, __________ and __________.”
→ Plants need three things to make food: sunlight, water, and carbon dioxide.
Looking at the diagram: Sunlight comes from the sun, water from roots, carbon dioxide from air.
So: Sunlight, Water, Carbon dioxide

(Note: Order might vary, but these are the three inputs.)

3. “Photosynthesis occurs in the organelle called __________ that’s only found in plants.”
→ The organelle where photosynthesis happens is the Chloroplast.

4. “Plants contain a green pigment called __________ that absorbs sunlight.”
→ The green pigment is Chlorophyll.

5. “Energy from the sun, carbon dioxide from the atmosphere and water absorbed by the roots react to produce __________ that plants need to survive.”
→ The food plants make is Glucose (a type of sugar).

6. “__________ is a gas that is released into the environment for animals and humans to breathe.”
→ The gas released is Oxygen.

Let’s double-check all answers against the word box — yes, all words are there.

Final filled paragraph:

Photosynthesis is the process by which plants produce their own food in the presence of Sunlight, Water, and Carbon dioxide. Photosynthesis occurs in the organelle called Chloroplast that’s only found in plants. Plants contain a green pigment called Chlorophyll that absorbs sunlight. Energy from the sun, carbon dioxide from the atmosphere and water absorbed by the roots react to produce Glucose that plants need to survive. Oxygen is a gas that is released into the environment for animals and humans to breathe.

All blanks filled correctly.

Final Answer:
Photosynthesis, Sunlight, Water, Carbon dioxide, Chloroplast, Chlorophyll, Glucose, Oxygen