Problem Analysis:
The worksheet is about understanding a food chain and identifying the role of different organisms in it. The task involves completing a food chain and explaining why an oak tree is called a producer.
#### Given Information:
1.
Organisms in the Food Chain:
- Owl
- Oak Tree
- Blackbird
- Caterpillar
2.
Feeding Relationships:
- Caterpillars eat oak leaves.
- Owls eat blackbirds.
- Blackbirds eat caterpillars.
3.
Tasks:
- (i) Complete the food chain for these four living things.
- (ii) Explain why the oak tree is called a producer by selecting the correct reason.
---
Solution:
#### (i) Completing the Food Chain:
A food chain shows the flow of energy from one organism to another, starting with the producer and ending with the top predator. Based on the given feeding relationships:
-
Oak Tree: Produces its own food through photosynthesis and serves as the primary source of energy in this food chain.
-
Caterpillar: Eats oak leaves, so it is a primary consumer.
-
Blackbird: Eats caterpillars, so it is a secondary consumer.
-
Owl: Eats blackbirds, so it is a tertiary consumer (top predator).
Thus, the food chain can be written as:
\[
\text{Oak Tree} \rightarrow \text{Caterpillar} \rightarrow \text{Blackbird} \rightarrow \text{Owl}
\]
#### (ii) Why the Oak Tree is Called a Producer:
Producers are organisms that produce their own food through photosynthesis. They form the base of the food chain and provide energy for other organisms.
-
Options Provided:
1. It loses its leaves in autumn.
2. It makes food by photosynthesis.
3. Its flowers are tiny.
4. Its leaves will not rot.
-
Correct Reason:
The oak tree is called a producer because it
makes food by photosynthesis. Photosynthesis is the process by which plants use sunlight, water, and carbon dioxide to produce glucose (food) and oxygen. This glucose serves as the primary source of energy for the entire food chain.
Thus, the correct box to select is:
\[
\boxed{\text{It makes food by photosynthesis.}}
\]
---
Final Answers:
1.
Food Chain:
\[
\text{Oak Tree} \rightarrow \text{Caterpillar} \rightarrow \text{Blackbird} \rightarrow \text{Owl}
\]
2.
Why the Oak Tree is Called a Producer:
\[
\boxed{\text{It makes food by photosynthesis.}}
\]
Parent Tip: Review the logic above to help your child master the concept of food chains and webs worksheets.
