Science 7 Unit A: Interactions and Ecosystems: Section 4.1 Questions

Describe three ways humans can impact or change an ecosystem. (pg. 67)

Identify one example of human impact on an ecosystem that you could help to lessen. Describe what you could do to lessen this impact. (pg.67)

Why may introducing a chemical to kill an insect population have an impact on humans? (p.67 &68)

Predict what would happen if you tried to remove a species from your local ecosystem—be specific. (pg. 67 &68)

Create a poster, picture, or chart that illustrates the present state of endangered or threatened species in Canada. (pg.69) You may use imported pictures from the interweb to help out.

In what ways do the following human activities affect ecosystems? (you will need to think about these answers)

a) clearing farmland to build a new housing development

b) cutting down trees to make paper and building materials

c) transporting crude oil across the ocean

d) burning logs in a fireplace

e) growing an apple orchard to sell the apples

f ) harvesting rare plants to make new medicines from chemicals they contain