Ecosystems Quiz

Grade 4 · Science · Quiz

Test your knowledge of ecosystems, biotic and abiotic factors, and organism roles.

Questions

Which of the following is an abiotic factor?
1. A fern
2. Sunlight
3. A beetle
4. A mushroom
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Answer: Sunlight
Sunlight is a non-living part of the environment, making it an abiotic factor.
What do producers use to make their own food?
1. Other animals
2. Dead leaves
3. Sunlight
4. Soil minerals only
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Answer: Sunlight
Producers use sunlight to make food through photosynthesis.
A deer eating grass is an example of a:
1. Producer
2. Carnivore
3. Decomposer
4. Herbivore
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Answer: Herbivore
A deer eating grass is a herbivore because it eats only plants.
Which organism is a decomposer?
1. Grasshopper
2. Oak tree
3. Mushroom
4. Hawk
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Answer: Mushroom
Mushrooms are decomposers that break down dead organic material.
Biotic factors include sunlight and water.
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Answer: False
Sunlight and water are abiotic (non-living) factors. Biotic factors are living things.
An omnivore eats both plants and animals.
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Answer: True
Omnivores eat both plants and animals — bears and raccoons are omnivores.
Without decomposers, nutrients would never return to the soil.
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Answer: True
Decomposers recycle nutrients from dead matter back into the soil. Without them nutrients would stay locked up.
Plants make food using a process called ___.
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Answer: photosynthesis
Photosynthesis is the process where plants use sunlight, water, and carbon dioxide to make food.
A desert, forest, and grassland are all examples of different ___.
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Answer: biomes
A biome is a large ecosystem type defined by its climate and the organisms that live there.
Which biome is the driest?
1. Forest
2. Ocean
3. Grassland
4. Desert
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Answer: Desert
Deserts receive very little rainfall — less than 10 inches per year — making them the driest biome.

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