Food chains worksheet for learning energy flow in aquatic and terrestrial ecosystems.

To solve this problem, we need to arrange the pictures into two correct food chains. A food chain shows how energy moves from one living thing to another. It always starts with a producer (a plant or algae that makes its own food) and ends with a top predator (an animal that eats others but isn't usually eaten).

Step 1: Identify the Producers
Producers are at the start of the food chain because they get energy from the sun.
- Looking at the "water" options: Algae is a plant-like organism that lives in water. It is the producer.
- Looking at the "land" options: The Leaf comes from a plant. It is the producer.

Step 2: Build the Food Chain in Water
The available water animals are: Algae, Fish, Shark, Seal.
1. Start: Algae (Producer)
2. Next: Who eats algae? Small fish eat algae. So, Fish comes next.
3. Next: Who eats fish? Seals eat fish. So, Seal comes next.
4. End: Who eats seals? Sharks are big predators that eat seals. So, Shark is last.

*Water Chain Order:* Algae → Fish → Seal → Shark

Step 3: Build the Food Chain on Land
The available land organisms are: Leaf, Worm, Chicken, Hawk.
1. Start: Leaf (Producer)
2. Next: Who eats leaves? Worms eat decaying leaves and plant matter. So, Worm comes next.
3. Next: Who eats worms? Chickens eat worms. So, Chicken comes next.
4. End: Who eats chickens? Hawks are birds of prey that hunt smaller birds like chickens. So, Hawk is last.

*Land Chain Order:* Leaf → Worm → Chicken → Hawk

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Final Answer:

Food chain in water:
Algae → Fish → Seal → Shark

Food chain on land:
Leaf → Worm → Chicken → Hawk