Energy Transformation
What is conduction?
conduction is transfer of history through contact
example: a metal spoon heating up in a pan
What are the 3 states of matter?
Gas, solid, and liquid
What is heat?
Is energy that is transferred from a warmer object to a cooler object.
What is specific heat?
The amount of energy required to raise the temperature of something.
what is radiation?
Transfer of thermal energy through heat with no contact.
Example: Marshmallow melting over a fire.
What is temperature?
Is a measure of the average kinetic energy of the particles in a substance. It used to measure the thermal energy of an object.
Is the specific heat of a wooden spoon lower or higher than the specific heat of a metal spoon.
The wooden spoon has a higher specific heat than the metal spoon as it requires far more energy to become hot than a metal spoon.
What is convection?
Convection is transfer of thermal energy through a fluid.
Example: Heating up pasta in boiling water
What is a solid? Does it have a definite or indefinite shape and volume?
A solid has a definite shape and a definite volume
What has more thermal energy? A cup of coffee that is 90 degrees Fahrenheit or a gallon of coffee that is 90 degrees Fahrenheit?
Even though the cup and gallon are the same temperature the gallon has more thermal energy because it contains more particles.
Which would be a better material for a park bench? Wood or metal? Explain using the word specific heat.
A wooden bench would be better because it has a higher specific heat than a metal bench.
What is thermal energy?
Thermal energy is particles heating up and temperature rising as the particles move faster. It is the combination of potential and kinetic energy.
What is a liquid? Does it have a definite or indefinite shape and volume?
A liquid has a definite volume and indefinite shape.
Which takes longer to boil? A cup of water or a gallon of water?
The gallon of water takes longer to boil because it takes more energy to heat up as it has more particles.
Explain the concept of thermal expansion?
When matter is heated it expands in volume. When it cools down it shrinks or contracts. Different materials expand and contract at different rates.
What is the law of conservation of energy?
Energy cannot be created nor destroyed.
What is a gas? Does a gas have a definite or indefinite shape and volume?
A gas has an indefinite volume and an indefinite shape.
What is a insulator?
What is a conductor?
A insulator are materials that do not conduct heat well. A jacket is a good insulator because it keeps your body heat in so it not transferred out of your body and to the air around you
A conductor is a material that conducts heat well. Metals are good conductors because they have a low specific heat and heat up easily.