Topic 1-3
What is a thermometer?
A mechanical or electrical device for measuring temperature.
_______ means to expand in volume and _______ means to decrease in volume
Expand, Contract
Name the 5 Energy Transfer Systems.
Energy source, direction of energy transfer, transformations, waste heat, control systems.
How are fossil fuels so important in Alberta?
Economy, provides 80% of province's electrical energy, provides employment
Name the THREE scales used for measuring temperature.
Celsius scale, Fahrenheit, Kelvin scale.
Name all the changes of state.
Fusion, solidification, condensation, evaporization, sublimation
What is a heat insulator
Materials that slow the transfer or conduction of thermal energy from one object to another.
Why is carbon monoxide so dangerous?
Colorless, odorless, and lethal. It hinders the person's brain making them unaware they are being affected by it and also causes confusion and dizziness.
Name the advantage and disadvantage of a thermocouple.
Thermocouples can measure temperatures so high that ordinary laboratory thermometers fail because the liquid in them would start to boil. They cannot be used to measure low temperatures accurately.
Define evaporative cooling.
A process in which the faster-moving particles on the surface of a liquid evaporate and escape into the air; the slower- moving particles, which are left behind, have lower kinetic energy, decreasing the temperature of the remaining liquid and the surface on which it is resting.
______________ is the process of transferring thermal energy through direct collisions between particles.
Thermal conduction.
Name 3 reasons why thermal energy can be so dangerous.
Answers May Vary: Can burn you, causes forest fires, burn down homes, pollutes the air, costs lots of money to rebuild damaged things, etc.
What does the Law of Conservation of Energy state?
Energy cannot be created or destroyed. It can only be transformed from one type to another or passed from one object to another.
Name the THREE characteristics of radiant energy.
They behave like waves, they can be absorbed and reflected by objects, they travel across empty space at the same very high speed 300 000 km/s.
What is passive solar heating?
A type of heating that uses materials in a structure to absorb, store, and release solar energy.
Give an example of 5 types of fossil fuels.
Answer May Vary: coal, petroleum, natural gas, oil shales, bitumen, tar sands, heavy oils, Orimulsion, diesel, etc.
How does a bimetallic strip work?
As the strip is heated, one metal expands more than the other. The strip is forced to coil more tightly. When the strip cools, the process is reversed. The same metal that expanded rapidly now contracts rapidly and the strip uncoils again.
A process by which a warm fluid moves from place to place carrying thermal energy.
What is cogeneration?
A method of energy conservation by which waste heat or energy from one industry is used by another industry.
Liquids that evaporate easily at low temperature are known as..
Refrigerants