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Answer Key
Grade 3 Social Studies: Innovations That Changed Life
1.
a new tool, idea, or way of doing something that someone creates
2.
an improvement or new useful change to how something works
3.
Answers vary: writing, printing press, telephone, internet
4.
Answers vary: wheel, train, car, airplane
5.
Answers vary: plow, irrigation, refrigerator
6.
yes
7.
yes — we must think about effects
8.
tools and methods people use to solve problems
9.
a new tool or idea someone creates
10.
a useful improvement or new change
11.
telephone/internet/writing/printing
12.
wheel/train/car/plane
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