Science-4th grade
Terms
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- Broom
- Simple machine (lever)
- Gear
- Complex machine
- Pliers
- Simple machine (lever)
- Inclined plane
- a wheelchair ramp is an example
- If the fulcrum is closer to the load
- It requires less effort to move a heavier object
- Bicycle
- Complex machine
- How are inclined planes, wedges and screws alike
- They are all types of inclined planes but do different things
- Effort
- The push or squeeze that makes a lever move
- Fulcrum
- The support on which a lever rests
- Wedge
- The pointed end of a moving ___ can split things apart
- Wheel and Axle
- A windup key on a toy is an example
- Pulley
- Can be made from a rope and wheen or a chain and a wheel
- Screws hold wood together better than nails
- because the threads make the screw hard to pull out
- Screw
- A simple machine with slanted threads on its sides
- Work
- using force to move or change something
- Lever
- A baseball bat is an example
- A sloping driveway
- Inclined plane
- A simple machine is different from a complex machine
- Complex machines are made up of more than one simple machine and do more complex work.
- Load
- The weight to be lifted or moved by a simple machine