Machines That Changed American Work is a free printable Grade 3 to Grade 5 social studies worksheet on how inventions raised productivity, and what might come next, aligned to C3 Framework indicator D2.Eco.13.3-5. It prints 3 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 6 of 25 · the same problems every time you open this link.
Set 1 has all 25 in a single PDF. All 25 sets ask different questions.
Machines That Changed American Work
D2.Eco.13.3-5
NameDate
Draw a line from each invention to what it changed. Then write your prediction.
1.Draw a line from each one to its match.
Telephone, Alexander Graham Bell, 1876
Cotton gin, Eli Whitney, 1793
Refrigerated railroad car, 1870s
Light bulb, Thomas Edison, 1879
A.Let factories and homes keep working after dark
B.Carried fresh meat across the country without spoiling
C.Let people talk to each other over long distances
D.Cleaned cotton fast, which led planters to enslave even more people
2.Draw a line from each one to its match.
Barbed wire, Joseph Glidden, 1874
Telegraph, Samuel Morse, 1844
Airplane, Wright brothers, 1903
Steel plow, John Deere, 1837
A.Carried people and mail through the air
B.Sent messages along wires in minutes instead of weeks
C.Fenced huge areas cheaply and closed the open range
D.Cut through thick prairie soil so farmers could plant more land
3.Choose one invention from this sheet and explain how it helped people produce more. Then predict an invention that could help farmers grow more food in the future.
I named an invention and what it changed.
I explained how it helped people produce more.
I described a future invention for farmers and how it would help.
LessonPrint · D2.Eco.13.3-5 · Set 6 · free to copy for classroom use
Answer key — Machines That Changed American Work
Set 6. Prints on its own sheet.
1.1. Telephone, Alexander Graham Bell, 1876 — C (Let people talk to each other over long distances) 2. Cotton gin, Eli Whitney, 1793 — D (Cleaned cotton fast, which led planters to enslave even more people) 3. Refrigerated railroad car, 1870s — B (Carried fresh meat across the country without spoiling) 4. Light bulb, Thomas Edison, 1879 — A (Let factories and homes keep working after dark)
2.1. Barbed wire, Joseph Glidden, 1874 — C (Fenced huge areas cheaply and closed the open range) 2. Telegraph, Samuel Morse, 1844 — B (Sent messages along wires in minutes instead of weeks) 3. Airplane, Wright brothers, 1903 — A (Carried people and mail through the air) 4. Steel plow, John Deere, 1837 — D (Cut through thick prairie soil so farmers could plant more land)
3.Names an invention from the sheet and explains how it helped people produce more, then predicts a believable future invention that would help farmers grow more food, with a reason.
Last reviewed 2026-09-05. Aligned to D2.Eco.13.3-5 of the C3 Framework for Social Studies State Standards.