Unit: Wheels and Levers
In this unit students
• examine how simple machines are used to change the speed or force of movement • demonstrate a practical understanding of wheels, gears and levers by constructing devices in which energy is transferred to produce motion. |
Duo tang Materials
|
What are simple machines?
Quick activity-
Lay a heavy book on top of your desk. Push it with your finger. Now place the book on top of two round pencils or crayons. Now push the book again with same finger.
Lay a heavy book on top of your desk. Push it with your finger. Now place the book on top of two round pencils or crayons. Now push the book again with same finger.
What difference have you experienced?
In which case does the book move more easily? Why?
In which case does the book move more easily? Why?
How do simple machine make work easier?
6 Simple machines
Simple machine scavenger
Simple machine vocab
Crossword puzzle
Inclined plane
Wheels and axles
|
|
Pulley
|
|
Gear
|
Gear in clock |
Lever
|
|
Leavers and Fulcrums
Building Devices and Vehicles that Move
In this unit students
• learn that different forms of energy can be used to propel model devices
• construct a mechanical device for a designated purpose, using materials and design suggestions provided
• learn to evaluate their work, by describing the effectiveness of the device and the appropriateness of materials used
• learn that different forms of energy can be used to propel model devices
• construct a mechanical device for a designated purpose, using materials and design suggestions provided
• learn to evaluate their work, by describing the effectiveness of the device and the appropriateness of materials used
Science Fair project
|
|