Physics - the dynamo effect + global warming

Question 1

What is the dynamo effect?

Answer 1

Moving a piece of wire between the poles of a magent, so that a voltage is created, or induced

Question 2

Name three ways the size of the current in the dynamo effect is increased

Answer 2

stronger magnets used, more turns of the wire (creating a coil), or move the wire faster

Question 3

State the three main greenhouse gases

Answer 3

Carbon dioxide, methane and water vapour

Question 4

What is the first step of the greenhouse effect?

Answer 4

Shorter wavelength electromagnetic waves from the sun pass through the atmosphere

Question 5

What is the second step of the greenhouse effect?

Answer 5

This radiation is absorbed by the Earth, which warms it. The Earth then emits longer wavelength infrared radiation

Question 6

What is the third and final step of the greenhouse effect?

Answer 6

Gases from the atmosphere absorb the longer wavelength infrared radiation and this warms it up

Question 7

What percentage of the greenhouse effect does water vapour account for?

Answer 7

50%

Question 8

What percentage of the greenhouse effect does methane account for?

Answer 8

8%

Question 9

What percentage of the greenhouse effect does carbon dioxide account for?

Answer 9

20%

Question 10

Why is global warming so hard to measure?

Answer 10

Because there are climate variations every year

Question 11

What do most scientists believe about global warming?

Answer 11

that humans are effecting it. Humans demand more and more energy to power their lives, which produces more carbon dioxide and adds to global warming