Educational worksheet on trophic levels and food webs for primary school students.

Since I can't view or access uploaded images directly, I can’t see the specific food web or organisms in your image. However, I can guide you through solving this trophic level worksheet based on typical ecology concepts and common examples.

Let’s go step by step, assuming a standard food web with organisms like:

- Grass (producer)
- Grasshopper (primary consumer)
- Mouse (primary consumer)
- Rabbit (primary consumer)
- Snake (secondary consumer)
- Hawk (tertiary consumer)
- Owl (secondary/tertiary consumer)
- Fox (secondary consumer)
- Decomposers (e.g., fungi, bacteria)

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Part 1: Matching Organisms to Trophic Levels

Use the food web to determine where each organism fits in the trophic hierarchy.

#### Trophic Level Definitions:
- Primary Producer: Organisms that make their own food (e.g., plants, algae).
- Primary Consumer: Herbivores that eat producers.
- Secondary Consumer: Carnivores that eat primary consumers.
- Tertiary Consumer: Carnivores that eat secondary consumers.
- Decomposer: Breaks down dead matter (not always shown in simple webs).

#### Example Matching:

| Organism | Trophic Level |
|---------------|------------------------|
| Grass | Primary producer |
| Grasshopper | Primary consumer |
| Mouse | Primary consumer |
| Rabbit | Primary consumer |
| Snake | Secondary consumer |
| Hawk | Tertiary consumer |
| Owl | Secondary or tertiary |
| Fox | Secondary consumer |
| Fungi/Bacteria| Decomposer |

> ✔ Tip: Follow the arrows in the food web — energy flows from the source (sun → producers → consumers).

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Part 2: Energy Pyramid

An energy pyramid shows how energy decreases at each level. The base is the largest (most energy), and it shrinks upward.

#### Energy Pyramid Structure:

```
Tertiary Consumer
(Hawk, Owl)
Secondary Consumer
(Snake, Fox)
Primary Consumer
(Mouse, Rabbit, Grasshopper)
Primary Producer
(Grass, Plants)
```

#### Fill in the Pyramid:

1. Primary Producer: Grass
2. Primary Consumer: Rabbit, Grasshopper, Mouse
3. Secondary Consumer: Snake, Fox
4. Tertiary Consumer: Hawk, Owl

> 🔁 Note: Some organisms may belong to multiple levels depending on diet (e.g., omnivores), but in simple webs, assign based on main diet.

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How to Solve It:

1. Identify Producers: Look for green plants, grass, trees.
2. Find Herbivores: Animals eating plants → primary consumers.
3. Find Carnivores Eating Herbivores: These are secondary consumers.
4. Top Predators: Eat other carnivores → tertiary consumers.
5. Decomposers: Usually not in the chain but recycle nutrients.

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Final Answer Example (if the food web includes):

#### Matching:
- Grass → Primary producer
- Grasshopper → Primary consumer
- Mouse → Primary consumer
- Snake → Secondary consumer
- Hawk → Tertiary consumer
- Owl → Tertiary consumer
- Rabbit → Primary consumer
- Fox → Secondary consumer
- Fungi → Decomposer

#### Energy Pyramid (from bottom to top):
- Primary Producer: Grass
- Primary Consumer: Rabbit, Grasshopper, Mouse
- Secondary Consumer: Snake, Fox
- Tertiary Consumer: Hawk, Owl

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If you can describe the organisms in your food web (e.g., "there's a plant, rabbit, fox, eagle, etc."), I can give you the exact answers tailored to your image!