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 13 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.
Cotton gin, Eli Whitney, 1793
Telegraph, Samuel Morse, 1844
Assembly line, Henry Ford, 1913
Airplane, Wright brothers, 1903
A.Cleaned cotton fast, which led planters to enslave even more people
B.Carried people and mail through the air
C.Sent messages along wires in minutes instead of weeks
D.Built cars step by step, cutting the time to make one
2.Draw a line from each one to its match.
Barbed wire, Joseph Glidden, 1874
Light bulb, Thomas Edison, 1879
Steel plow, John Deere, 1837
Telephone, Alexander Graham Bell, 1876
A.Fenced huge areas cheaply and closed the open range
B.Cut through thick prairie soil so farmers could plant more land
C.Let factories and homes keep working after dark
D.Let people talk to each other over long distances
3.The railroad and the airplane changed how people travel. Predict an invention that could change travel in the future, and explain who it would help.
I described my invention.
I compared it with the railroad or the airplane.
I explained who it would help.
LessonPrint · D2.Eco.13.3-5 · Set 13 · free to copy for classroom use
Answer key — Machines That Changed American Work
Set 13. Prints on its own sheet.
1.1. Cotton gin, Eli Whitney, 1793 — A (Cleaned cotton fast, which led planters to enslave even more people) 2. Telegraph, Samuel Morse, 1844 — C (Sent messages along wires in minutes instead of weeks) 3. Assembly line, Henry Ford, 1913 — D (Built cars step by step, cutting the time to make one) 4. Airplane, Wright brothers, 1903 — B (Carried people and mail through the air)
2.1. Barbed wire, Joseph Glidden, 1874 — A (Fenced huge areas cheaply and closed the open range) 2. Light bulb, Thomas Edison, 1879 — C (Let factories and homes keep working after dark) 3. Steel plow, John Deere, 1837 — B (Cut through thick prairie soil so farmers could plant more land) 4. Telephone, Alexander Graham Bell, 1876 — D (Let people talk to each other over long distances)
3.Describes a believable future travel invention, compares it with the railroad or airplane, and explains who it would help and how.
Last reviewed 2026-09-05. Aligned to D2.Eco.13.3-5 of the C3 Framework for Social Studies State Standards.