6 Questions
What determines whether an object will float or sink in water?
The density of the object compared to water
What is the purpose of gears in a machine?
To connect two rotating parts together
What would happen if you interlock a large gear with a small gear?
The small gear would turn faster
What is needed to make the boats move across the water?
A sail to catch the wind
What would happen if you place objects in the boat?
The boat would move slower
What is the purpose of creating a double gate that opens from the left and right?
To allow both sides to be opened simultaneously
Study Notes
Density and Buoyancy
- Density refers to how close together the molecules of an object are.
- Objects less dense than water will float.
- Objects more dense than water will sink.
Sailing and Wind
- To make boats move across the water, materials are needed to create sails.
- The concept of "wind" needs to be replicated to test the sail's effectiveness.
Gears and Mechanisms
- Gears are rotating parts of a machine with teeth that can interlock with another gear.
- When a large gear is interlocked with a small gear, the smaller gear turns faster.
- When two gears of the same size are interlocked, they turn at the same speed.
- Gears can be used to create mechanisms, such as a double gate that opens from both sides.
Parker, the park manager, needs help making boats move across the water. Learn about density and buoyancy to solve this stem challenge.
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