Food Web Review Worksheet with Diagram and Questions

Let’s go step by step to solve each question.

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Q1. A food web is made of several interconnected ________. It shows the ________ from one organism to another.

Think about what a food web is: it’s like a big map showing who eats whom in nature. Each “who eats whom” path is called a food chain. So, a food web is many food chains linked together.

Also, arrows in a food web show the direction of energy flow — because when one animal eats another, energy moves from the eaten to the eater.

✔ So:
- First blank: food chains
- Second blank: flow of energy (or just “energy”)

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Q2. List four different food chains presented in the food web.

We need to trace paths starting from producers (plants) and ending with top predators. Let’s pick 4 clear ones:

1. Flowering Plant → Rabbit → Snake → Owl
2. Grass → Mouse → Snake → Owl
3. Grass → Deer → Fox
4. Flowering Plant → Rabbit → Fox *(Wait — does rabbit go to fox? Looking at diagram: yes, arrow from Rabbit to Fox)*

Actually, let’s double-check based on arrows:

From diagram:

- Flowering Plant → Rabbit → Snake → Owl ✔
- Flowering Plant → Rabbit → Fox ✔
- Grass → Mouse → Snake → Owl ✔
- Grass → Deer → Fox ✔
- Also: Grass → Mouse → Owl? No direct arrow.
- Flowering Plant → Mouse? No.
- Sun → Grass/Flowering Plant? That’s energy source, not part of food chain per se.

So here are 4 valid food chains:

1. Flowering Plant → Rabbit → Snake → Owl
2. Flowering Plant → Rabbit → Fox
3. Grass → Mouse → Snake → Owl
4. Grass → Deer → Fox

*(Note: You could also do Grass → Mouse → Owl if there was an arrow — but in this diagram, mouse goes to snake and owl? Wait — looking again: Mouse has arrows to Snake AND Owl? Yes! In the diagram, Mouse → Owl is shown. So we can also use:)*

Alternative for #3: Grass → Mouse → Owl

But since the question says “four different”, any 4 correct ones are fine.

I’ll list these 4:

1. Flowering Plant → Rabbit → Snake → Owl
2. Flowering Plant → Rabbit → Fox
3. Grass → Mouse → Owl
4. Grass → Deer → Fox

*(All follow actual arrows in the diagram.)*

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Q3. What is the ultimate source of energy in the food chain?

In almost all ecosystems on Earth, the sun provides the original energy. Plants (producers) capture sunlight through photosynthesis. Then animals eat plants or other animals to get that energy.

Looking at the diagram: The Sun is drawn with arrows pointing to Flowering Plant and Grass — meaning it gives them energy.

✔ Answer: The Sun

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Q4. Tick (✓) the correct boxes and give (X) in each incorrect box.

We need to classify each organism as:

- Autotroph: makes its own food (usually via photosynthesis) → plants
- Heterotroph: cannot make own food; must eat others → animals
- Producer: same as autotroph — starts the food chain
- Herbivore: eats only plants
- Carnivore: eats only meat (animals)

Let’s go row by row:

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Grass
→ Makes own food → Autotroph ✓, Producer ✓
→ Not heterotroph X
→ Eats nothing → not herbivore/carnivore → both X

Mouse
→ Eats grass → Heterotroph ✓
→ Not producer X
→ Eats plant → Herbivore ✓
→ Does it eat meat? Diagram doesn’t show mouse eating animals → so probably not carnivore → X
*(Note: Some mice are omnivores, but based on this diagram, mouse only eats grass → so herbivore only)*

Deer
→ Eats grass → Heterotroph ✓, Herbivore ✓
→ Not producer X, not carnivore X

Fox
→ Eats deer and rabbit → Heterotroph ✓, Carnivore ✓
→ Not producer X, not herbivore X

Flowering Plant
→ Like grass → Autotroph ✓, Producer ✓
→ Others X

Rabbit
→ Eats flowering plant → Heterotroph ✓, Herbivore ✓
→ Others X

Snake
→ Eats rabbit and mouse → Heterotroph ✓, Carnivore ✓
→ Others X

Owl
→ Eats snake, mouse, maybe others → Heterotroph ✓, Carnivore ✓
→ Others X

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Now fill table:

| Organism | Autotroph | Heterotroph | Producer | Herbivore | Carnivore |
|----------------|-----------|-------------|----------|-----------|-----------|
| Grass | ✓ | X | ✓ | X | X |
| Mouse | X | ✓ | X | ✓ | X |
| Deer | X | ✓ | X | ✓ | X |
| Fox | X | ✓ | X | X | ✓ |
| Flowering Plant| ✓ | X | ✓ | X | X |
| Rabbit | X | ✓ | X | ✓ | X |
| Snake | X | ✓ | X | X | ✓ |
| Owl | X | ✓ | X | X | ✓ |

*(Note: For Mouse — if you think it might be omnivore, but diagram only shows it eating grass → so herbivore is correct here. Same logic applies to others.)*

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Final Answer:

Q1:
A food web is made of several interconnected food chains. It shows the flow of energy from one organism to another.

Q2:
Four food chains:
1. Flowering Plant → Rabbit → Snake → Owl
2. Flowering Plant → Rabbit → Fox
3. Grass → Mouse → Owl
4. Grass → Deer → Fox

*(Other combinations using correct arrows are also acceptable.)*

Q3:
The ultimate source of energy in the food chain is the Sun.

Q4:

| Organism | Autotroph | Heterotroph | Producer | Herbivore | Carnivore |
|----------------|-----------|-------------|----------|-----------|-----------|
| Grass | ✓ | X | ✓ | X | X |
| Mouse | X | ✓ | X | ✓ | X |
| Deer | X | ✓ | X | ✓ | X |
| Fox | X | ✓ | X | X | ✓ |
| Flowering Plant| ✓ | X | ✓ | X | X |
| Rabbit | X | ✓ | X | ✓ | X |
| Snake | X | ✓ | X | X | ✓ |
| Owl | X | ✓ | X | X | ✓ |