Let's solve the
Energy Pyramid Worksheet step by step.
---
🔍 Understanding the Energy Pyramid
An
energy pyramid shows how energy flows through an ecosystem, from producers to consumers. Each level is called a
trophic level, and energy decreases as you move up because only about
10% of the energy is transferred from one level to the next (this is known as the
10% Rule).
The sun is the original source of energy for most ecosystems.
---
🌞 Step 1: Identify the Trophic Levels
From bottom to top:
1.
Producers – These are organisms that make their own food using sunlight (photosynthesis).
→ Examples: Plants, grasses, trees, flowers.
2.
Primary Consumers – Herbivores that eat producers.
→ Examples: Cow, squirrel, bee.
3.
Secondary Consumers – Carnivores or omnivores that eat primary consumers.
→ Examples: Spider, snake.
4.
Tertiary Consumers – Top predators that eat secondary consumers.
→ Example: Hawk.
---
💡 Step 2: Label the Trophic Levels
We'll label each box on the
left side with the correct trophic level name.
#### Left-side labels (from bottom to top):
-
Producers
-
Primary Consumers
-
Secondary Consumers
-
Tertiary Consumers
---
⚡ Step 3: Write Available Energy at Each Level
Start with
100% at the producer level (sunlight captured by plants), and apply the
10% rule:
-
Producers: 100% (they capture solar energy)
-
Primary Consumers: 10% of 100% =
10%
-
Secondary Consumers: 10% of 10% =
1%
-
Tertiary Consumers: 10% of 1% =
0.1%
> Note: The exact numbers may vary slightly depending on the context, but this is the standard model.
So, the
right-side boxes (next to each level) should show the
available energy percentage.
#### Right-side energy values (from bottom to top):
-
100% (Producers)
-
10% (Primary Consumers)
-
1% (Secondary Consumers)
-
0.1% (Tertiary Consumers)
---
✔ Final Answer Summary
#### Labels on the left:
1.
Producers
2.
Primary Consumers
3.
Secondary Consumers
4.
Tertiary Consumers
#### Energy values on the right:
1.
100%
2.
10%
3.
1%
4.
0.1%
---
📌 Explanation:
-
Energy flow is
unidirectional (one-way): Sun → Producers → Consumers.
- Only about
10% of energy is passed from one trophic level to the next; the rest is lost as heat or used in metabolic processes.
- This explains why pyramids are narrow at the top — not enough energy supports many top-level predators.
---
✔ Completed Worksheet (Text Version):
```
[Producers] [100%]
[Primary Consumers] [10%]
[Secondary Consumers] [1%]
[Tertiary Consumers] [0.1%]
```
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✔ You're done! Just fill in the blanks accordingly on your worksheet.
Parent Tip: Review the logic above to help your child master the concept of ecological pyramid worksheet.
