📄 6th Grade Other: Food Chain And Food Web Worksheet
📌 1. True / False
1. Plants are considered producers because they make their own food using sunlight.
2. A food chain shows multiple feeding relationships among different organisms in an ecosystem.
3. Decomposers, like bacteria and fungi, break down dead organisms and return nutrients to the soil.
4. Energy flows in only one direction through a food chain, starting from the sun.
5. Animals that eat only plants are called carnivores.
✏️ 2. Fill in the Blanks
1. An animal that hunts and eats other animals for food is called a .
2. Organisms that get energy by consuming other organisms are known as .
3. A is a diagram that shows how energy is transferred from one living organism to another in an ecosystem.
4. Animals that eat both plants and other animals are classified as .
5. The process by which plants make their own food using sunlight, water, and carbon dioxide is called .
🔗 3. Matching
« An organism that makes its own food, usually through photosynthesis.
« An organism that obtains energy by feeding on other organisms.
« An organism that breaks down dead organic matter and returns nutrients to the environment.
« A single pathway showing how energy is transferred from one organism to another.
« A network of interconnected food chains in an ecosystem.
✍️ 4. Short Answer Questions
1. What is the primary source of energy for almost all food chains on Earth?
💡 Suggested Answer: The primary source of energy for almost all food chains is the sun. Plants (producers) capture this solar energy to make their own food through photosynthesis.
2. Explain the difference between a herbivore and a carnivore.
💡 Suggested Answer: A herbivore is an animal that eats only plants, such as a rabbit or a deer. A carnivore is an animal that eats only other animals, such as a lion or a wolf.
🎯 5. Multiple Choice
1. Which of the following organisms is a primary consumer?
2. What would happen to an ecosystem if all the decomposers suddenly disappeared?
3. In a food chain, what does the arrow (\(\rightarrow\)) represent?
📝 6. Open-Ended Questions
1. Describe a simple food chain involving a plant, an insect, and a bird. Identify each organism's role (producer, primary consumer, secondary consumer).
💡 Solution Steps:
A simple food chain could be: Plant \(\rightarrow\) Insect \(\rightarrow\) Bird.
* <strong>Plant:</strong> This is the <strong>producer</strong>. It makes its own food using sunlight through photosynthesis.
* <strong>Insect:</strong> This is the <strong>primary consumer</strong> (herbivore). It eats the plant for energy.
* <strong>Bird:</strong> This is the <strong>secondary consumer</strong> (carnivore/omnivore, depending on the bird). It eats the insect for energy.
2. Explain why a food web is generally more stable and realistic than a single food chain for describing an ecosystem.
💡 Solution Steps:
A food web is more stable and realistic than a single food chain because it shows multiple feeding relationships and pathways of energy flow within an ecosystem. In reality, most organisms eat more than one type of food, and they are also eaten by more than one type of predator.
If one food source in a food web becomes scarce, an animal might have other food sources to rely on, preventing a complete collapse of the ecosystem. A single food chain is too simplistic and suggests that if one organism is removed, the entire chain breaks down, which is often not the case in complex ecosystems.
3. Imagine an ecosystem with grass, mice, snakes, and hawks. Construct a food web using these organisms and explain what might happen if the snake population drastically decreased.
<strong>If the snake population drastically decreased:</strong>
1. <strong>Mice population:</strong> The population of mice would likely <strong>increase</strong> because their main predator (snakes) would be fewer.
2. <strong>Grass population:</strong> An increase in mice would lead to more grass being eaten, so the grass population would likely <strong>decrease</strong>.
3. <strong>Hawk population:</strong> The hawks, which eat snakes, would have less food. However, since hawks also eat mice, they might shift to eating more mice. Initially, the hawk population might <strong>decrease</strong> due to less food, but it might stabilize if they can successfully hunt more mice.
Name Surname: .................................. Date: .... / .... / 202...
Food Chain And Food Web Worksheet
SCORE
A. True (T) / False (F)
( .... )
Plants are considered producers because they make their own food using sunlight.
( .... )
A food chain shows multiple feeding relationships among different organisms in an ecosystem.
( .... )
Decomposers, like bacteria and fungi, break down dead organisms and return nutrients to the soil.
( .... )
Energy flows in only one direction through a food chain, starting from the sun.
( .... )
Animals that eat only plants are called carnivores.
B. Fill in the Blanks
1)
An animal that hunts and eats other animals for food is called a .....................
2)
Organisms that get energy by consuming other organisms are known as .....................
3)
A .................... is a diagram that shows how energy is transferred from one living organism to another in an ecosystem.
4)
Animals that eat both plants and other animals are classified as .....................
5)
The process by which plants make their own food using sunlight, water, and carbon dioxide is called .....................
C. Matching Concepts
( .... )
An organism that makes its own food, usually through photosynthesis.
- Food Chain
( .... )
An organism that obtains energy by feeding on other organisms.
- Food Web
( .... )
An organism that breaks down dead organic matter and returns nutrients to the environment.
- Consumer
( .... )
A single pathway showing how energy is transferred from one organism to another.
- Decomposer
( .... )
A network of interconnected food chains in an ecosystem.
- Producer
D. Short Answer Questions
1)
What is the primary source of energy for almost all food chains on Earth?
2)
Explain the difference between a herbivore and a carnivore.
E. Multiple Choice Questions
1)
Which of the following organisms is a primary consumer?
A) GrassB) RabbitC) FoxD) Mushroom
2)
What would happen to an ecosystem if all the decomposers suddenly disappeared?
A) The amount of sunlight would increase.B) Dead organisms and waste would pile up, and nutrients would not be returned to the soil.C) Producers would grow much faster.D) All animals would become herbivores.
3)
In a food chain, what does the arrow (\(\rightarrow\)) represent?
A) The direction of growthB) The direction of energy flowC) The direction of migrationD) The direction of reproduction
F. Open-Ended Questions
1)
Describe a simple food chain involving a plant, an insect, and a bird. Identify each organism's role (producer, primary consumer, secondary consumer).
2)
Explain why a food web is generally more stable and realistic than a single food chain for describing an ecosystem.
3)
Imagine an ecosystem with grass, mice, snakes, and hawks. Construct a food web using these organisms and explain what might happen if the snake population drastically decreased.