3-6 What is a compound machine?
OBJECTIVE: Name some compound machines.
Key Term
compound machine: machine that combines two simple machines or more
Lesson Summary
• Most machines are made up of a combination of simple machines.
• A pair of scissors is a compound machine made up of two levers joined by a screw.
• A bicycle is a compound machine made up of wheels and axles, levers, pulleys, and screws.
• Humans have been using machines for hundreds of thousands of years.
Key Term
compound machine: machine that combines two simple machines or more
Lesson Summary
• Most machines are made up of a combination of simple machines.
• A pair of scissors is a compound machine made up of two levers joined by a screw.
• A bicycle is a compound machine made up of wheels and axles, levers, pulleys, and screws.
• Humans have been using machines for hundreds of thousands of years.