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Grade 7- Heat and Temperature Final

Last updated 4 days ago

20 questions

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Question 1

1.

In early times, people observed that heat – because it seemed to flow from a hot place to a cold place – must be an invisible fluid that they called …

A. temperature

B. energy

C. thermal

D. caloric

Question 2

2.

Co-generation is a process in which two forms of energy are produced at the same time from one energy source. The two forms of energy produced are usually…

A heat and light

B kinetic and solar

C electricity and heat

D mechanical and light

Question 3

3.

A dangerous by-product, from the use of fossil fuels (coal, natural gas, and oil) enters the atmosphere when industries burn this fuel. A by-product can react with water in the air to form acid rain. The by-product is ...

A carbon dioxide

B sulfur dioxide

C carbon monoxide

D nitrogen monoxide

Question 4

4.

Thermal energy has the power to hurt us and destroy our possessions. All of the following practices are dangerous and harmful EXCEPT ...

A recycling programs

B dumping of toxic chemicals

C forest fires

D volcanic eruptions

Question 5

5.

The three main energy users are …

A home, transportation, industry

B recreation, transportation, streetlights

C shopping, transportation, industry

D home, transportation, recreation

Question 6

6.

Canadian scientists developed the Canada Deuterium-Uranium reactor to provide nuclear energy in parts of Canada and to sell to other countries. The major problem with this reactor is the …

A long time to produce thermal energy

B cost and distribution of the power

C long term storage of waste materials

D safety record it has worldwide

Question 7

7.

An alternative for thermal energy that is inexpensive, practical and renewable, and does not require increased technological advances is wind power. This technology utilizes a windmill to generate electrical power that can then be converted into thermal energy. Unfortunately, this alternative is not practical where there is no …

A wind

B sunshine

C shelterbelt

D sloping terrain

Question 8

8.

The costs of treating lakes, that have been damaged by acid rain, have to be paid for by every citizen. This makes this type of cost …

A personal

B economic

C environmental

D societal

Question 9

9.

Insulators are rated by their insulating ability. R-value is given to each material that is used in the construction of a building. The best insulating product would have a …

A low R-value

B high R-value

C fractional R-value

D restricted R-value

Question 10

10.

Is heat a substance or a form of energy? Explain your answer.

Question 11

11.

Describe one example of heat technology from the past and one example from the present day.

Question 12

12.

List the four main ideas of the particle model of matter.

Question 13

13.

How does the particle model explain a change of state of matter?

Question 14

14.

A metal bolt heated to a high temperature will be slightly larger than if it was in a freezer. Why?

Question 15

15.

Define conduction, convection, and radiation.

Question 16

16.

Give three examples of natural thermal energy.

Question 17

17.

Describe how passive and active solar heating systems differ.

Question 18

18.

Explain how a thermostat works and why it is important for safety.

Question 19

19.

Describe three non-renewable resources.

Question 20

20.

When you have completed all the questions and watched ALL the videos draw a happy face in the box to indicate that you have completed all of this exam.