Heat Basics
This is the flow of energy from a warm object to a cooler object.
Answer: What is heat?
This type of heat transfer occurs by direct contact.
Conduction
Which of the following is NOT a renewable energy source: natural gas, solar energy, hydro energy, wind energy?
Natural gas
What impact do plants have on heat in the environment?
They cool the environment through transpiration
This term means how much light is reflected without being absorbed.
Albedo
What is the scientific explanation for heat energy?
energy caused by the movement of particles?
This type of heat transfer occurs through electromagnetic waves.
Radiation
Name one renewable energy source and one non-renewable energy source.
Renewable: solar; Non-renewable: oil
What is the greenhouse effect?
The trapping of the Sun’s heat by gases in the atmosphere
This process occurs when gases in the Earth’s atmosphere trap the Sun’s heat.
Greenhouse effect
What is temperature, and what instrument measures it?
the average energy of particles, measured with a thermometer
This type of heat transfer occurs by the circulation of a liquid or gas.
Convection
Why are non-renewable resources still used if renewable resources are cleaner?
They are cheaper and more accessible
What are the most toxic gases that contribute to global warming: carbon dioxide, fluorinated gases, helium gas or oxygenated gases
Fluorinated gases
This is the process of water movement through a plant and the loss of water mainly through leaves.
Transpiration
What happens to particles when heat is removed?
They move slower and get closer together
Wind is caused by this type of heat transfer.
Convection
Explain the Law of Conservation of Energy
Energy cannot be created or destroyed, only transformed
Why might it feel warmer in a city than in a forest on the same day?
Because of urban heat islands caused by heat-absorbing materials
This theory explains why matter behaves the way it does.
Particle theory
This occurs when two objects are in contact and there is no exchange of heat energy.
thermal equilibrium
Describe the conduction, convection, and radiation involved in boiling a pot of water over a fire.
Conduction heats the pot, convection circulates water, radiation comes from the fire
Give an example of an energy transformation that results in heat.
Chemical energy in wood → thermal energy when burned
Is the greenhouse effect always bad? Explain.
No, it helps keep Earth warm enough for life, but too much causes climate change
These gases trap heat in the Earth’s atmosphere and contribute to global warming.
Greenhouse gases