Vocabulary
Define convection
Thermal energy transfer through a fluid (liquid or gas)
What are three types of thermal energy transfer?
Conduction, convection, and radiation.
What type of energy comes from the sun?
Radiant energy
Describe the energy conversion when you plug in a hairdryer and use it.
The electrical energy is converted into thermal energy and mechanical energy (sound.)
What are resources that are continuously being replenished called?
Renewable or inexhaustible resources
Define Conduction
Transfer of thermal energy through direct contact (touching)
A metal spoon getting hot in a bowl of soup.
What is conduction?
The type of energy is stored in a battery, plants (firewood), and YOU?
What is Chemical energy?
Describe the energy conversion when plants grow in sunshine.
Radiant energy from the sun is converted into chemical energy in the plants.
What are some disadvantages of nuclear energy sources?
Radioactive waste,dangerous, explosive, uranium can run out.
Heat transfer through empty space using waves.
What is radiation?
Boiling an egg in water.
What is an example of convection?
Explain what happens to Thermal energy in a cup of hot chocolate left on the table.....
Thermal energy transfers from the hot chocolate to the cup, table, and environment. (warm to cool objects)
Describe the energy conversions when gasoline is burned so that your car can move down the street and the engine gets hot.
Chemical energy in gas is converted into mechanical energy and thermal energy.
What are some advantages of using wind energy.
Pollution free, inexhaustible
What is the difference between renewable and nonrenewable sources? Give an example of each.
A renewable source is replenished continually, like the sun. A nonrenewable source is used up faster than it can be made, like fossil fuels.
Getting warmed by the sunshine outside.
What is radiation?
What type of energy is contained in the nucleus of an atom?
Nuclear energy
Explain the energy transformation in a wind turbine
Mechanical to electrical
List 3 renewable resources
water, wind, solar, biomass, geothermal
What are a turbine and generator?
The turbine is a device that is moved by water or steam and the generator converts mechanical energy into electrical energy.
Thermal energy transfers from ______ objects to ______ objects.
warm to cool
What type of energy is stored in plants and therefore also in fossil fuels?
Chemical energy
Describe the energy conversion when you put a new battery into the flashlight and turn it on.
Chemical energy is converted into radiant and thermal energy.
What are the disadvantages of using hydro power (dams)?
Habitat loss, expensive to build, must be near water....