Heat Flow
Hot to Cold, Warmer to Colder
Cooking a marshmallow over a campfire uses which type of heat transfer? (Conduction, Convection, or Radiation)
Radiation
What are the three states of matter?
solid, liquid, gas
A material that allows heat to transfer within the material.
Conductor
If I place an ice cube in my hand, heat will flow from the ice cube to my hand. True or False
False.
Heat will flow from my hand (warmer) to the ice cube (colder).
What types of heat transfer involve heat flow from hot objects to colder objects?
Conduction, Convection, and Radiation
The phase change where a liquid turns into a gas.
Evaporation
A material that does not allow heat to transfer within it.
Insulator
Holding a marshmallow near a campfire flame causes it to turn brown even if the marshmallow does not touch the flame. Why does this happen?
Heat radiates from the fire and cooks the marshmallow (Radiation)
If Cindy's hands are very cold and the cup is very hot, heat energy transfers from the cup to her hands because
Heat flows from warmer objects to colder.
Thermal energy flows from hot to cold.
The phase change where a solid turns into a liquid
Melting
The TOTAL kinetic energy of particles in matter
Thermal energy
Mr. Garcia added an ice cube to his hot tea so he could drink it. Describe the direction of heat flow.
Heat will flow from the hot tea to the ice cube
In which of the following methods of heat transfer is it necessary for the objects to be directly touching one another?
Conduction
Which states of matter have no definite shape and take the form of their container?
Liquids and gases
When heat transfer between two objects stops because they have reached the same temperature.
Thermal equilibrium
If I place object who's temperature is (34 degrees Celsius) on top of an identical object at (28 degrees Celsius), what will happen to the temperature of the objects?
Heat will flow from warmer object to cooler object until they are both the same temperature.
How does convection affect hot and cold air?
hot air rises and cooler air falls.
Mr. Conner places a beaker containing liquid water on a hot plate and gradually increases the temperature. What are the students likely to observe if he continues to add heat to the water?
-The temperature will rise
-liquid will turn to gas
What are the three units used to measure temperature?
Fahrenheit
Celsius
Kelvin