Unit C: Heat and Temperature review

• Explain expansion and contraction in terms of heat

Things expand when heated and contract when cooled

• In Canada what do we measure degrees in?

Celsius

• Caloric theory was proven to be untrue because… (read textbook)

The mass of a heated spoon did not change

• Heat energy is measured in ___________

joules

• Heat energy flows from ___________________  to ____________________

Hot objects to cold objects

• What heating technology reappeared over time?

Central heating

• What are examples of non-sustainable resources?

Oil, coal, natural gas

• The transfer of heat energy between substances that are in contact with each other is called…

conduction

• When a metal spoon is put into a bowl of hot soup, heat is transferred from what to what?

From the soup to the spoon

• In what substances could a convection current form? (solid, liquid or gas)

Liquid and gas

• What substances absorb heat the fastest, a black shirt or white shirt?

A black shirt

• The transfer of energy by infrared rays is called…

radiation

• The energy of movement is called…

Kinetic energy

• The method of heat transfer when liquid or gas particles move from one area to another is called…

Convection  

• According to the Particle Model of Matter (PMOM), heating a substance does what to the particles?

Increases the kinetic energy of the particles

• The measure of the average Kinetic energy of the particles in a substance is called…

Temperature 

• The total Kinetic energy of all the particles in a substance is called…

Thermal energy

• When a liquid changes to a solid it is called… 

freezing

• What is the relative particles movement of each state of matter from fastest to slowest movement of particles?

Gas, liquid, solid

• During conduction, which way does heat transfer?

From areas of greater kinetic energy to areas of lower kinetic  energy

• When cooking chicken in the oven, why should the reflective side of the aluminum foil be toward the food?

The reflective side will reflect the heat toward the chicken causing it to cook faster

• Which state(s) of matter has a definite volume? (can take a shape)

Liquid and solid

• Materials that do not allow easy transfer of heat are called…

insulators

• The four natural sources of thermal energy are…

Fires, geothermal, sun, decay

• The name given to energy produced by the sun is…

Solar energy

• Heating systems are controlled by…

Thermostats 

• Every insulator is given a number showing its insulating ability, this is known as its…

R-value

• Heating systems that provide heat for a larger area from a single source is known as…

Central heating

• Many thermostats contain a strip which is made up of two different metals; this is called a…

Bimetallic strip

• Insulation is used to…

Prevent heat transfer from the warm object to the cold object

• One source of energy is not limited, does not create pollution, nor does it carry radiation risks. This source is… 

The sun

• Making effective energy use choices begins with…

Separating societal needs from societal wants

• What is a non-renewable resource?

It can not be replaced

• An example of a renewable energy resource is…

Wind, water, solar

• A major disadvantage of using wind energy is that…

It can only be used in windy areas

• Which energy sources produce extremely hazardous waste material?

nuclear

• An advantage of using hydroelectric energy is that…

It does not create air pollution

• To improve their energy efficiency, many large companies that produce electricity now use a process called…

Cogeneration