5 Questions
What determines whether an object will float or sink in water?
The density of the object relative to water
What would happen to the boats in the park if you placed objects in them?
They would become heavier and harder to move
What is the purpose of gears in a machine?
To interlock with another gear to transmit motion
When you interlock a large gear with a small gear, what happens?
The small gear turns faster
What would be the result of creating a double gate that opens from the left and right?
Both sides of the gate would be able to open independently
Study Notes
Density and Buoyancy
- Density refers to how close together the molecules of an object are.
- Objects less dense than water will float, while objects more dense than water will sink.
Boats and Sails
- Parker, the park manager, wants to find a way to make four boats move across the water.
- Teresa suggests using materials to make sails.
- A possible solution to make the boats move is to create "wind".
Gears
- Gears are rotating parts of a machine with teeth that can interlock with another gear.
- The direction of gear rotation depends on the interlocking gears.
- When a large gear interlocks with a small gear, the small gear will turn faster.
- When two gears of the same size interlock, they will turn at the same speed.
Gate Mechanism
- A double gate can be created to open from both the left and right sides.
- This is achieved by interlocking gears to facilitate the simultaneous opening of both sides.
Learn about density and how it affects objects in water. Discover why some objects float and others sink.
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