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Heat is not a substance. It is a form of _____.
What is energy?
The melting, boiling, and freezing points of water, respectively and with units.
What is 0oC, 100oC, 0oC?
A solar heating system that can directly use the sun's rays.
What is a passive solar heating system?
A non-renewable resource formed from the remains of plants and animals that lived on Earth millions of years ago; coal, oil, and natural gas.
What are fossil fuels?
What direction does heat energy travel?
From hot to cold. From high kinetic energy to low kinetic energy.
The basic, required conditions we must meet in order to live; The extras that are not vital for survival and are nice to have but not necessary to have
Needs; Wants
The total kinetic energy of all the particles in a substance.
What is thermal energy?
A device used to control temperatures of indoor environments, whose name means "heat" and "to maintain.
What is a thermostat? It works using a bimetallic strip, where one metal expands faster causing the strip to bend and act as a switch for an electric circuit controlling the heat.
A non-renewable energy source where small amounts of radioactive uranium produces lots of heat when it undergoes the process of fission.
What is nuclear?
The transfer of heat energy between substances that are in contact with each other.
What is conduction? It happens in a chain reaction of particle collisions!
The name for the invisible fluid that was thought to be heat.
What is caloric?
This process is the reason expansion joints were invented for use on bridges.
What is thermal expansion? (When thermal energy increases, so does the volume. Objects being heated expand. Objects being cooled contract.)
What is thermal conductivity?
What are the three largest energy users in the world?
1. Home
2. Transportation
3. Industry
The heat transfer that explains how your hand feels warm when you hold it near a hot object without touching it.
What is radiation?
Meaning something can be maintained or continued
What is sustainable?
Explain the concept of convection as detailed as possible, using the example of boiling water on a stove.
1. Heat reaches the water particles at the bottom of the pot by conduction. The kinetic energy of these particles increase - they move faster and spread farther apart.
2. The heated water expands, becomes less dense, rises. This pushes the cooler particles to the side.
3. The cooler particles sink, taking the place of the particle that have risen.
4. As the particles reach the bottom, they are heated. This repeats and forms a convection current.
A liquid that evaporates at low temperatures.
What is a refrigerant?
A process that large companies use to improve their energy efficiency, where they produce two forms of energy at the same time from one source.
What is cogeneration? The two forms of energy are usually electricity and heat.
A measure of how well a building prevents heat loss.
What is thermal efficiency?
What evidence lead to the theory that heat is a fluid being rejected?
The theory that heat is a fluid that flows from hot object to cold object was rejected because the mass of the objects did not change when heated. If caloric was a fluid, it would have mass and when a spoon in a hot bowl of soup got hot, the mass of the spoon should increase and the mass of the spoon should decrease. But, the measured masses were the same before and after.
Name the four components of the particle model of matter.
1. All matter is made of tiny particles.
2. The particles are always moving.
3. The particles have spaces between them.
4. Adding heat to particles makes them move faster.
TWO words can describe this heating system:
- Air is heated by burning fuel in a furnace
- The heated air travels through ducts to registers.
- A blower pulls returning air back.
- The filter cleans returning air to the furnace.
Central heating system; Forced-air heating
Precipitation falling through polluted air that dissolves the pollutants, harming lakes, vegetation, and structures. This is an environmental cost of burning fossil fuels.
What is acid rain?
A collector (using water, dark surface, and copper tubing), heat storage unit, and heat distribution system (pumps) comprise this system.
What is an active solar heating system?