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Energy Transfer
Test Description: Density, conduction, convection, radiation
Instructions: Answer all questions to get your test result.
1) If three unknown materials have the same mass but different volumes, which will have the greatest density?
A
the material with the greates volume
B
the material with the least volume
2) The same boat will float higher in the Great Salt Lake than it will in a lake in Wisconsin. Why?
A
The Great Salt Lake has a greater density
B
The Great Salt Lake has a bigger volume
C
The Great Salt Lake has a greater mass
3) If a wooden block were cut into eight identical pieces, the density of each piece compared to the density of the original block would be
A
Eight times bigger than the original block
B
One-eighth the density of the original block
C
The exact same as the original block
4) An iceberg lies dead ahead of the Titanic. Why is the iceberg on the ocean's surface?
A
The iceberg has air bubbles in it which lower its density.
B
Water expands as it cools making it more dense.
5) Which will float higher in the water, an empty ship or an identical ship filled with styrofoam?
A
The ship filled with styrofoam.
B
The empty ship.
6) Which of the following is the best example of convection?
A
A forced air heating system
B
Burning the roof of your mouth on hot pizza
C
Getting a sunburn while snow skiing on a sunny day
7) Which of the following is the best example of radiation?
A
Getting a sunburn while snow skiing on a sunny day
B
Burning the roof of your mouth on hot pizza
C
A forced air heating system
8) What type of heating does a microwave most rely on?
A
Convection.
B
Conduction.
C
Radiation.
9) Which of the following explains why when you bake a pizza on the bottom rack of the oven the crust gets crispier than on the top rack.
A
The pizza is in a more direct line of heat for conduction at the bottom of an oven.
B
The pizza is in a more direct line of heat by radiation at the bottom of an oven.
C
There is more heat transferred by convection on the bottom of an oven.
10) How do the radiant heaters in use at ice hockey arenas work?
A
The radiant heaters warm the air which then warms the people.
B
The radiant heaters set up convection currents in the air to warm the people.
C
The radiant heaters only heat matter they encounter so the air stays cool.
*select an answer for all questions
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