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 16 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
Refrigerated railroad car, 1870s
Personal computer, 1970s
Airplane, Wright brothers, 1903
A.Carried people and mail through the air
B.Let one office worker do tasks that once took many people
C.Cleaned cotton fast, which led planters to enslave even more people
D.Carried fresh meat across the country without spoiling
2.Draw a line from each one to its match.
Steel plow, John Deere, 1837
Telephone, Alexander Graham Bell, 1876
Telegraph, Samuel Morse, 1844
Assembly line, Henry Ford, 1913
A.Cut through thick prairie soil so farmers could plant more land
B.Sent messages along wires in minutes instead of weeks
C.Built cars step by step, cutting the time to make one
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 16 · free to copy for classroom use
Answer key — Machines That Changed American Work
Set 16. Prints on its own sheet.
1.1. Cotton gin, Eli Whitney, 1793 — C (Cleaned cotton fast, which led planters to enslave even more people) 2. Refrigerated railroad car, 1870s — D (Carried fresh meat across the country without spoiling) 3. Personal computer, 1970s — B (Let one office worker do tasks that once took many people) 4. Airplane, Wright brothers, 1903 — A (Carried people and mail through the air)
2.1. Steel plow, John Deere, 1837 — A (Cut through thick prairie soil so farmers could plant more land) 2. Telephone, Alexander Graham Bell, 1876 — D (Let people talk to each other over long distances) 3. Telegraph, Samuel Morse, 1844 — B (Sent messages along wires in minutes instead of weeks) 4. Assembly line, Henry Ford, 1913 — C (Built cars step by step, cutting the time to make one)
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.