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

Posljednje ažuriranje about 1 year ago

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Pitanje 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.

Pitanje 1

1.

What caused the eerie silence in the town of Centralia?

A government mandate

A natural disaster

Abandoned coal mines

An underground fire

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Pitanje 3

3.

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

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Pitanje 5

5.

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Pitanje 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?

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Pitanje 17

17.

2

Pitanje 18

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2

Pitanje 19

19.

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Pitanje 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

Pitanje 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

Pitanje 6

6.

Which fuel has the highest heat of combustion?

coal

octane (gasoline)

wood

methane (natural gas)

Pitanje 8

8.

Pitanje 9

9.

Pitanje 10

10.

Pitanje 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

Pitanje 12

12.

Pitanje 13

13.

Pitanje 14

14.

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

Pitanje 15

15.

Pitanje 16

16.

Pitanje 20

20.

How long can an underground coal fire burn?

6000- 250 years

more than 6000 years

5 - 70 years

250- 70 years