1. Which of the following describes the motion of the red and blue dyes in the bin?
They go in a circular motion from the bottom to the top then back to the bottom.
They travel in a linear pattern across the bottom of the bin.
The make a zigzag pattern at the top of the water.
They do not move once placed in the water.
8. Evaluate the food coloring and water bin model. What are its strengths and limitations in modeling thermal convection?
It shows exactly what would happen in the Earth. One limitation is the fact that tectonic plates are much larger and the asthenosphere has a different viscosity.
It shows exactly what would happen in the Earth. One limitation is the fact that tectonic plates are much smaller and the asthenosphere has less viscosity.
It demostrates an example of what is happening in the Earth. One limitation is the fact that tectonic plates are much larger and the asthenosphere has a different viscosity
It demostrates an example of what is happening in the Earth. One limitation is the fact that tectonic plates have the same density as wax, but the asthenosphere has a different viscosity.
There is not enough information given to determine the motion of the red and blue dyes in the bin.
2. What is the role of density changes in a convection cycle?
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2 points
It does not play a roll in convection.
As density of the water increases it moves to the top of the bin.
As density of the water decreases it moves to the top of the bin.
As density of the water decreases it moves to the bottom of the bin.
The correct answer is: As density of the water decreases it moves to the top of the bin.
3. How is what happens with the red dye in the water bin similar to what happens to a hot air balloon surrounded by cool air.
Convection occurs, which lifts the hot air balloon because the less dense air goes to the top of the balloon.
Convection occurs, which lifts the hot air balloon because the more dense air goes to the top of the balloon
Conduction occurs, which lifts the hot air balloon because the less dense air goes to the top of the balloon.
Conduction occurs, which lifts the hot air balloon because the more dense air goes to the top of the balloon.
in the video the red die is placed in the middle of the cold water and the blue dye is placed to the left and right of the red dye a becker with hot water is then placed under the bucket directly under the red dye the red dye after a while creates a cloud and moved toward the blue dye on both sides
The correct answer is: Convection occurs, which lifts the hot air balloon because the less dense air goes to the top of the balloon.
4. Recall that matter cannot move without energy. What is the energy source that moves the red dye?
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2 points
Conduction
Thermal Energy
Radiation
Force
The correct answer is: Thermal Energy
5. Why is the motion of the water in the bin considered a cycle? What could stop the cycle? What could accelerate it?
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3 points
It is linear. Nothing could stop the cycle. Only an increase in temperature could accelerate it.
It is circular. Nothing could stop the cycle. Only a decrease in temperature could accelerate it.
It is linear. A lack of thermal energy could stop the cycle. Only a decrease in temperature could accelerate it.
It is circular. A lack of thermal energy could stop the cycle. Only an increase in temperature could accelerate it.