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Answer Key
Grade 3 Science: Organisms & Environment Change
1.
changes
2.
rain/water
3.
soil
4.
struggle/die
5.
species
6.
harm/outcompete
7.
biodiversity
8.
nutrients/sediment
9.
a change in habitat conditions like water, food, or shelter
10.
pollution, deforestation, building dams (answers vary)
11.
flood, drought, fire, storm (answers vary)
12.
less water; plants wilt or die
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