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Inventions and Their Side Effects is a free printable Grade 3 to Grade 5 social studies worksheet on the benefits and side effects of American inventions, aligned to C3 Framework indicator D2.Eco.8.3-5. It prints 8 questions with an answer key on its own sheet of paper, in 25 versions that each ask different questions, so no two students in the class work from the same page. Print it from the browser or download it as a PDF — no account, no email.

Set 23 of 25 · the same problems every time you open this link.

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Set 1 has all 25 in a single PDF. All 25 sets ask different questions.

Inventions and Their Side Effects

D2.Eco.8.3-5

NameDate

Circle the best answer.

1.Big dams on Western rivers made electricity and stored water. What did they cost?
  • A.They flooded valleys and blocked salmon from swimming upstream
  • B.They stopped all rain in the West
  • C.They dried up the ocean
2.Early steamboats burned wood for fuel. What happened along the rivers?
  • A.Forests along the banks were cut down
  • B.New forests grew faster
  • C.The rivers flowed backward
3.The telegraph sent news across the country in minutes. How did that help people?
  • A.They could learn about events the same day
  • B.Letters arrived a week later than before
  • C.They no longer needed newspapers ever again
4.The pesticide DDT killed insect pests. What did scientists find it also did?
  • A.It made crops grow taller
  • B.It harmed birds such as the bald eagle
  • C.It helped birds lay stronger eggs
5.The cotton gin made cleaning cotton much faster. What harmful effect followed in the South?
  • A.Slavery ended right away
  • B.Farmers stopped growing cotton
  • C.Slavery spread as planters grew more cotton
6.Chemical fertilizers raised harvests. What can happen when rain washes them into rivers?
  • A.They make the river water cleaner
  • B.They turn the water into fuel
  • C.They can harm fish and other water life
7.Air conditioning helped cities in hot places such as Arizona and Florida grow. What is one cost?
  • A.It uses a great deal of electricity
  • B.It makes summers cooler outdoors
  • C.It stops cities from growing
8.Cars let families live farther from work. What is one side effect for the air?
  • A.The air has no change at all
  • B.Cars clean the air as they drive
  • C.Exhaust from cars adds to air pollution

LessonPrint · D2.Eco.8.3-5 · Set 23 · free to copy for classroom use

Answer key — Inventions and Their Side Effects

Set 23. Prints on its own sheet.

  1. 1.They flooded valleys and blocked salmon from swimming upstream
  2. 2.Forests along the banks were cut down
  3. 3.They could learn about events the same day
  4. 4.It harmed birds such as the bald eagle
  5. 5.Slavery spread as planters grew more cotton
  6. 6.They can harm fish and other water life
  7. 7.It uses a great deal of electricity
  8. 8.Exhaust from cars adds to air pollution

Last reviewed 2026-09-05. Aligned to D2.Eco.8.3-5 of the C3 Framework for Social Studies State Standards.