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 4 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.
Light bulb, Thomas Edison, 1879
Cotton gin, Eli Whitney, 1793
Barbed wire, Joseph Glidden, 1874
Airplane, Wright brothers, 1903
A.Fenced huge areas cheaply and closed the open range
B.Let factories and homes keep working after dark
C.Carried people and mail through the air
D.Cleaned cotton fast, which led planters to enslave even more people
2.Draw a line from each one to its match.
Telegraph, Samuel Morse, 1844
Personal computer, 1970s
Telephone, Alexander Graham Bell, 1876
Assembly line, Henry Ford, 1913
A.Sent messages along wires in minutes instead of weeks
B.Let people talk to each other over long distances
C.Built cars step by step, cutting the time to make one
D.Let one office worker do tasks that once took many people
3.The telegraph and the telephone changed how people send messages. Predict how people might send messages in the future, and explain one good and one bad effect.
I described a future way to send messages.
I gave one good effect.
I gave one bad effect.
LessonPrint · D2.Eco.13.3-5 · Set 4 · free to copy for classroom use
Answer key — Machines That Changed American Work
Set 4. Prints on its own sheet.
1.1. Light bulb, Thomas Edison, 1879 — B (Let factories and homes keep working after dark) 2. Cotton gin, Eli Whitney, 1793 — D (Cleaned cotton fast, which led planters to enslave even more people) 3. Barbed wire, Joseph Glidden, 1874 — A (Fenced huge areas cheaply and closed the open range) 4. Airplane, Wright brothers, 1903 — C (Carried people and mail through the air)
2.1. Telegraph, Samuel Morse, 1844 — A (Sent messages along wires in minutes instead of weeks) 2. Personal computer, 1970s — D (Let one office worker do tasks that once took many people) 3. Telephone, Alexander Graham Bell, 1876 — B (Let people talk to each other over long distances) 4. Assembly line, Henry Ford, 1913 — C (Built cars step by step, cutting the time to make one)
3.Predicts a future way to send messages, linked to the telegraph or telephone, with one good effect and one bad effect explained.
Last reviewed 2026-09-05. Aligned to D2.Eco.13.3-5 of the C3 Framework for Social Studies State Standards.