Grade 7 Unit 4 Review Sheet - Weebly



Grade 7 Unit 1 Review Sheet

Chapter 1

Name - ____Key_____

1. Give THREE (3) examples of an organism (in any ecosystem), its main habitat and one niche that it may have.

Answers will vary.

| | | |

|Organism |Habitat |Niche |

| | | |

|Frog |Pond |Eat flies |

| | |Eat trout or other fish from |

|Bear |Forest |rivers/streams |

| | | |

|Robin |Forest |Eat worms / provide food for babies |

| | | |

2. Is it possible for two organisms to live in the same habitat, but have different niches? Explain by giving an example.

Yes, for example, a bear and a maple tree can both live in a Forest Ecosystem, but can have different responsibilities (i.e. niche). For example, a bear will hunt for trout for food, while a Maple tree needs water and carbon dioxide for survival.

3. Complete the following concept map.

The four ecosystems are:

Forest, Arctic, Ocean and Coastine and Freshwater.

4. List THREE (3) biotic parts of an Arctic Ecosystem.

Answers will vary.

Polar Bears, Seals, Whales, Arctic Fox, Arctic Hare, etc.

5. What abiotic factors are likely to have a large impact on a population of mussels living on a rocky seashore?

Rocks – the mussel will attach to rocks and find protection.

Wind/water – can move the mussels from place to place along the coastline.

Slope of the coastline – if the rocky coastline is steep, the mussel can move easily.

6. Draw or list FIVE (5) things you would find in an ocean/coastline ecosystem.

|Answers will vary, but must include abiotic and biotic factors. |

|Mussels, sharks, whales, seaweed, salt water, rocks, soil, wind, fog, etc. |

7. What is meant by the term species?

Organisms that can mate and produce organisms of the same type.

8. Ecosystems can exist within other ecosystems. Give an example that helps explain this statement.

For example, a pond or bog can be located with a Forest ecosystem or an Arctic ecosystem can include both freshwater and salt water ecosystems.

9. Using the term, “range of tolerance,” explain why many birds migrate south during Newfoundland winter’s?

The birds may migrate south during Newfoundland winter’s as the cold temperatures are outside of the “range of tolerance for that species” (i.e. cannot tolerate or survive cold temperatures).

10. List the FOUR (4) levels of biological organization of an ecosystem in order, starting with the smallest.

Smallest to Greatest: Individual, Population, Community and Ecosystem.

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