7.2.2 Practice
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Kristina McClamrock
Nov 27, 2012, 9:27:13 AM11/27/12
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7.2.2 Practice: Taming the Compass Practice Assignment
Earth Science (S1392846) Kristina McClamrock
1. What is the name of the line with which a compass aligns? (3 points)
The south pole should point to the north magnetic pole. Then, you rotate the compass to match up with the needle. Then, you line up with the travel direction arrows.
2. Which pole (north or south) of a compass magnet is attracted to Earth's magnetic north pole? (4 points)
The North Pole arrow on the compass.
3. Is the magnet in a compass a permanent magnet or an electromagnet? (3 points)
There is no source of current, so the magnet is permanent.
4. The magnetic north pole and the geographic North Pole are not in the same location.
A. Are the magnetic north pole and the geographic North Pole always the same distance apart? (2 points)
No, they are not always the same distant.
B. Why is this true or not true? (8 points)
The Earth's geographical pole are positioned by the Earth's rotational axis, so it doesn't change, but the magnetic north pole reverses over time. So, the move far apart, until they are opposite, and then move back.
5. The angle of difference between the geographic and magnetic poles is called the declination. How does the declination change as you move north from where you live? (5 points)
I'm not really sure as to how to answer this question, but if you move from the position you are at, then of course the declination will move some. It would move more going from east to west.
6. It is important to take the declination into account when you are closer to the poles.
A. What happens to the angle of declination as you get closer to the poles? (2 points)
The declination becomes very, very variable and unpredictable as you move closer to the poles.
B. Why is it important to take this into account if you are traveling with a compass? (3 points)
This is important to know, because your compass may not work as well, or even at all.
7. What characteristic of iron would make it a bad material for the housing around a compass? (5 points)
Iron attracts magnets, which is what a compass basically is.
8. Recall that this is what a compass would look like if you were orienting yourself to the northwest.
If you wanted to go southeast, how would the compass be positioned? Draw your answer below. (15 points)
I turned this in on a seperate sheet of paper.
Earth Science (S1392846) Kristina McClamrock
1. What is the name of the line with which a compass aligns? (3 points)
The south pole should point to the north magnetic pole. Then, you rotate the compass to match up with the needle. Then, you line up with the travel direction arrows.
2. Which pole (north or south) of a compass magnet is attracted to Earth's magnetic north pole? (4 points)
The North Pole arrow on the compass.
3. Is the magnet in a compass a permanent magnet or an electromagnet? (3 points)
There is no source of current, so the magnet is permanent.
4. The magnetic north pole and the geographic North Pole are not in the same location.
A. Are the magnetic north pole and the geographic North Pole always the same distance apart? (2 points)
No, they are not always the same distant.
B. Why is this true or not true? (8 points)
The Earth's geographical pole are positioned by the Earth's rotational axis, so it doesn't change, but the magnetic north pole reverses over time. So, the move far apart, until they are opposite, and then move back.
5. The angle of difference between the geographic and magnetic poles is called the declination. How does the declination change as you move north from where you live? (5 points)
I'm not really sure as to how to answer this question, but if you move from the position you are at, then of course the declination will move some. It would move more going from east to west.
6. It is important to take the declination into account when you are closer to the poles.
A. What happens to the angle of declination as you get closer to the poles? (2 points)
The declination becomes very, very variable and unpredictable as you move closer to the poles.
B. Why is it important to take this into account if you are traveling with a compass? (3 points)
This is important to know, because your compass may not work as well, or even at all.
7. What characteristic of iron would make it a bad material for the housing around a compass? (5 points)
Iron attracts magnets, which is what a compass basically is.
8. Recall that this is what a compass would look like if you were orienting yourself to the northwest.
If you wanted to go southeast, how would the compass be positioned? Draw your answer below. (15 points)
I turned this in on a seperate sheet of paper.
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