At what temperature does water freeze on the Fahrenheit scale?
Water freezes at 32 degrees F.
100
Is it possible to have a temperature lower than absolute zero?
No.
100
Define a solid.
A solid holds its shape and does not flow.
100
Water molecule want to stay together because..
Attraction
100
1. What is heat conduction?
The transfer of heat by the direct contact of particles of matter (by touch)
200
At what temperature does water boil on the Fahrenheit scale?
Water boils at 212 degrees F.
200
Define absolute zero.
The lowest possible temperature – thermal energy is as close to zero as it can be (atoms almost cannot “jiggle” at all”)
200
Define a liquid.
A liquid holds its volume but not its shape. Liquids flow.
200
Explain the spread of the food coloring in both the cold and warm water?
Greater the temperature of the water, food coloring spread quicker.
200
2. What are some good materials for insulation?
Air, plastic, foam, wool….Airspace
300
What are the freezing point and the boiling point of water on the Celsius scale?
Water freezes at 0 degrees C and boils at 100 degrees C.
300
What is the Kelvin scale?
A temperature scale that starts at absolute zero and has units the same as Celsius degrees.
300
How is a gas similar to a liquid, and how is it different?
A gas flows like a liquid but unlike a liquid it can expand or contract to fill a container.
300
Even though water appears still in a glass, what is really happening?
Molecules are still moving
300
Describe convection:
The transfer of heat by the motion of moving water or air.
400
Is a degree Fahrenheit the same size as a degree Celsius? Explain.
No. There are 180 degrees between freezing and boiling (32 and 212) on the Fahrenheit scale. There are 100 degrees between freezing and boiling on the Celsius Scale.
400
Where could absolute zero be observed?
Lab or other planet.
400
What holds the molecules in a material together?
Attraction
400
Explain how a thermometer work.
Liquid takes up space. Molecules move faster or slower, filling the space
400
Insulators do a good job of what?
Keeping heat energy from escaping.
500
What does temperature measure?
Temperature measures the kinetic energy per atom due to random motion.
500
What is the hottest possible temperature on the Kelvin scale?
There is no hottest possible temperature (there is no upper limit on any temperature scale).
500
Explain the difference in density between the solid form a material and the gas form.
A solid is more dense than the same material as a gas, because there are more atoms packed together in the same amount of space.
500
What happens to liquid when it is heated?
Expand, fast moving molecules, boil at 0 degrees celsius
500
5. All of the energy that the Earth receives from the Sun comes from: