Exploring Benthos: Grade 7 Science Worksheet
This worksheet introduces 7th-grade students to benthos, focusing on benthic organisms, their habitats, and ecological roles.
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Exploring Benthos
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Read each question carefully and answer to the best of your ability. Some questions may require you to think critically about the information provided.
What are Benthos?
Benthos refers to the community of organisms that live on, in, or near the seabed, riverbed, or lakebed. These organisms play a crucial role in aquatic ecosystems, contributing to nutrient cycling and serving as a food source for many other creatures.
1. Where do benthic organisms primarily live?
Floating in the open water
On the surface of the water
On, in, or near the seabed
Attached to plants above water
2. Which of the following is NOT a characteristic of benthic organisms?
They are often filter feeders
They play a role in nutrient cycling
They primarily live in the air
They can be a food source for other animals
3. The term refers to organisms that live on, in, or near the bottom of a body of water.
4. Benthic organisms are important for the process of cycling in aquatic environments.
5. All benthic organisms are stationary and cannot move.
True
False
6. Benthic organisms are only found in oceans, not in freshwater lakes or rivers.
True
False
7. Describe two different types of habitats where benthic organisms can be found.
8. Explain why benthic organisms are important to the overall health of an aquatic ecosystem.