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Answer Key
Grade 5 Science: Human Impacts on Earth Systems
1.
impact/change/affect
2.
use/need
3.
air/water/soil (answers vary)
4.
harm/waste
5.
problem/issue
6.
evidence
7.
waste/trash
8.
habitat
9.
a way people change Earth systems
10.
something useful from the environment
11.
use evidence to judge if it meets goals
12.
Answers vary: reduce idling, plant trees, clean filters
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