Latitude And Longitude / Polaris Flashcards

1
Q

How is the shape of the Earth not perfectly round? What is it actually referred to as?

A

It is referred to as an oblate spheroid. The diameter around the equator is slightly larger than around the poles.

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2
Q

The axis of Earth is tilted at approx. ____ degrees

A

23.5

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3
Q

The speed of when the Earth is rotating depends on what?

A

How far North or South of the equator you are

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4
Q

What is the greatest velocity at? The least?

A

Equator. North and South poles.

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5
Q

What’s a coordinate system?

A

A methods of locating an exact location on a two dimensional surface

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6
Q

Polaris aka

A

The North Star

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7
Q

Where is 0 degrees longitude?

A

Greenwich, England

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8
Q

What is the 180th meridian called?

A

International date line

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9
Q

Every __ degrees of longitude equals __ hour of time

A
  1. 1.
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10
Q

How can you determine your longitude?

A

You must know the time difference between your location and the prime meridian

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11
Q

what does latitude measure?

A

How far north or south of the equator your location is

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12
Q

What does longitude measure?

A

How far a location is east or west of the prime meridian.

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13
Q

How many minutes are in 1° of latitude or longitude?

A

60 minutes

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14
Q

What to remember when working with time zones

A

West is less, East increase

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15
Q

How do you locate Polaris?

A

Find the Big Dipper and follow the pointer stars at the end of the bowl

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16
Q

What is the importance of Polaris?

A
  1. Polaris is always due to North

2. The altitude of Polaris is equal to your latitude

17
Q

What is altitude?

A

The height of an object above the horizon measures in degrees (0 degrees -horizon, 90 degrees -zenith)

18
Q

If the lines of latitude/longitude are between two lines it’s always the _____ ______

A

Lower number

19
Q

Ex. 42° 40’N, 73° 45’W

A

.

20
Q

Where is the Tropic of Cancer?

A

23.5°N latitude

21
Q

When you are at the North Pole, what is the altitude of Polaris?

A

90 degrees