6.What is the energy transformation found in a coal fired power plant?
The energy transformation is chemical energy to electrical energy. (Chemical to thermal to electrical is also OK.)
100
11. What is the definition of conduction?
Conduction is the transfer of thermal energy from particle to particle through direct contact.
100
16. What is the definition of convection?
Convection is the transfer of thermal energy through the movements of currents within a fluid.
100
21. What is the definition of radiation?
Radiation is the transfer of thermal energy through electromagnetic waves.
200
2. Nuclear energy is stored in this part of an atom.
Nuclear energy is stored in the nucleus of an atom.
200
7. True or False? Potential energy can be transformed into kinetic energy but, kinetic energy can not be transformed into potential.
False, most forms of energy can be converted into other forms.
200
12. If you wanted to prevent the transfer of thermal energy, what sort of materials would you use?
Insulators would work best to prevent thermal energy transfer, materials like wood, rubber, or cotton.
200
17. In what direction do heated currents, of either a gas or liquid, travel?
Heated currents travel upwards, towards cooler currents, until they cool down and fall downwards.
200
22. True or false. Does heat being transferred by radiation have to travel through molecules?
False, radiation is the way the sun heats up the Earth, electromagnetic waves are able to travel through empty space.
300
3. What type of energy can be defined as being "stored?"
Potential energy can be defined as being stored.
300
8. What energy transformation is found in a waterfall?
Gravitational potential energy to kinetic energy is found in a waterfall. The water has GPE right before it falls and kinetic energy as it is falling.
300
13. If you were to use conduction to transfer thermal energy, what sort of materials would work best?
Conductors work best to conduct thermal energy, materials like metals.
300
18.Diagram how a room would be heated using convection.
Hot air would rise from the heater vents, transferring its heat to the cooler parts of the room, until it cooled and fell to the floor again, the process would then repeat.
300
23. In what direction is heat always transferred?
Heat is always transferred from hot object to cooler objects.
400
4. What is it called when energy changes from one form to another?
When energy transforms from one form to another it is called an energy transformation.
400
9. What does the law of conservation of energy state? (Think about the law of conservation of mass, they are sort of related.)
The law of conservation of energy states that when one form of energy is converted into another, no energy is created or destroyed.
400
14. What is the measurement of the kinetic energy of particles in an object?
Temperature is the measurement of the kinetic energy of particles in an object.
400
19. Is warming up beside a campfire an example of convection? Why or why not?
Warming up beside a campfire is NOT an example of convection, it is an example of radiation. In order to be an example of convection you would have to be sitting above the fire, so the hot air would rise to heat you.
400
24. Is heat the same thing as temperature, or the transfer of thermal energy between objects?
Heat is the transfer of thermal energy between objects. temperature is the measurement of the kinetic energy in an object.
500
5. What unit is used to measure heat and energy?
The joule is used to measure heat and energy.
500
**DAILY DOUBLE**
10. What term describes the total kinetic energy in an object?
Thermal energy is the total kinetic energy in an object.
500
15. Why would a metal spoon feel warmer than a plastic spoon, in a cup of soup?
The metal spoon would feel warmer because metal conducts thermal energy, heat, better than plastic, which is an insulator.
500
20. Give three examples of heat transfer through convection.
1) Hot air balloon. 2) Heating your house with heaters on the floor. 3) BBQ'ing any food.
500
25. Give three examples of heat transfer through radiation.
1) Sun heating the Earth. 2) A greenhouse heating up. 3) Sitting next to a fire.