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Lesson 2.2 Why a Pennsylvania Town has been Burning for 60 Years

Last updated 9 months ago

21 questions

1

5

Question 21

21.

In the past 50 years, California has switch from using the combustion of coal to the combustion of methane to generate electricity. What are the advantages of using methane as a fuel rather than coal. For full credit, you must use evidence from the article to support you answer.

Question 1

1.

What caused the eerie silence in the town of Centralia?

A government mandate

A natural disaster

Abandoned coal mines

An underground fire

1

2

Question 3

3.

Why is a fire inside a mine so dangerous to the people who live near by?

1

2

Question 5

5.

The heat of combustion is the _______ released when the fuel reacts with _______ . 

1

1

2

1

1

1

1

1

1

2

3

1

Question 17

17.

Sulfur dioxide is made when the coal burns because the coal contains _______ atoms.

2

Question 18

18.

Hydrogen sulfide is made when coal burns because at high temperatures _______ and _______ react to make hydrogen sulfide. 

2

Question 19

19.

An endothermic process like evaporation _______ heat from the _______ 

1

Question 2

2.

What is subsidence in the context of the article?

Collapse of ground due to weakened rock

The spread of the fire to neighboring towns

population decline

economic decline

Question 4

4.

The carbon content is the percentage of the mass of carbon in the sample of coal. Which type of coal has the most carbon in it?

Lignite

Clean

Bituminous

Anthracite

Question 6

6.

Which fuel has the highest heat of combustion?

coal

octane (gasoline)

wood

methane (natural gas)

Question 7

7.

Coal is the only fuel that does not have water (H₂O) as a product of combustion. Why do you think that is true?

Question 8

8.

The heat released from burning coal is produced because new _______  are formed when the _______  is made.

Question 9

9.

An exothermic reaction is a chemical reaction that _______ heat.

Question 10

10.

Activation energy is the energy needed to _______ a chemical reaction.

Question 11

11.

An example of activation energy would be

the energy released from a hot pack

the energy needed to light a match

the energy absorbed when ice melts

the energy released when hot water cools

Question 12

12.

SO₂ is a product of the combustion of coal when the coal contains _______ .

Question 13

13.

A chain reaction happens when the heat of combustion is _______ the activation energy. 

Question 14

14.

According to the tetrahedron of fire, an effective way to put out the fire might be to......

Question 15

15.

When oxygen (O₂) is low, a fire can produce both _______ and _______. 

Question 16

16.

Carbon monoxide poisoning causes _______ ,_______ , and _______ .

Question 20

20.

How long can an underground coal fire burn?

6000- 250  years

more than 6000 years

5 - 70 years

250- 70 years