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Worksheets01 Form of the Earth
Total questions: 17
Worksheet time: 51mins
In navigation, what is a circle on the earth’s surface whose centre is the centre of the earth?
a great circle
a small circle
a meridian
an anti-meridian
Is the Equator a great circle?
YES
NO
Which of the following best describes a small circle used in earth-based navigation?
any parallel of latitude, other than the equator
any parallel of latitude, including the equator
any parallel of latitude that intersects at a right angle all lines of Meridians, including the Prime Meridian
any parallel of latitude that intersects at a right angle all lines of Meridians, other than the Prime Meridian
Select the word set that, when inserted into the gaps of this text, produces a TRUE Statement.
When viewed from space above the North Pole, the earth rotates in a (i) _______________direction and the direction towards which it is moving is defined as (ii) _________
(i) anti clockwise, (ii) East
(i) anti clockwise, (ii) West
(i) clockwise, (ii) East
(i) clockwise, (ii) West
In navigation, what is the word ‘CONVERGENCE’ used to describe?
the changing angle between great circle tracks and meridians
the curve of a rhumb line as it approaches the geographic poles
the increasing horizontal distance between meridians as they move from the geographic poles towards Equator
the reducing horizontal distance between meridians as they move away from the Equator towards the geographic poles
In which hemisphere is the place 38° 39’ 48” S 177° 58’ 42” E located?
Northern hemisphere
Southern hemisphere
What linear distance is equal to 1° of latitude change North or South measured on a meridian?
1 nautical mile
60 nautical miles
15 nautical miles
24 nautical miles
Convert 85 US gallons to liters
315 liters
322 liters
345 liters
330 liters
Convert 27 kilometers (km) to nautical miles (nm)
10.2 nm
14.6 nm
35.5 nm
13.2 nm
What is a ‘rhumb line’?
a line on the surface of the Earth that crosses all lines of latitude at the same angle
a line on the surface of the Earth that crosses all lines of longitude at the same angle
the shortest distance between two points
the shortest distance between Magnetic North and the Geographic South Pole
Add the correct word phrase to the end of this text in order to make a TRUE statement
Meridians of longitude are ….
lines drawn on the Earth's surface that are always perpendicular to each other
lines drawn on the surface of the Earth joining the true geographic poles
lines drawn on the surface of the Earth that join points of equal latitude
When viewed from above the North Pole, the direction of the Earth's rotation is ....
North to south
East to west
anti-clockwise (counter-clockwise)
clockwise
What is the speed of 1 knot?
a rate of change of horizontal distance equal to one nautical mile per hour
a rate of change of horizontal distance equal to one statute mile per hour
the value of the measure of the speed of light at sea level
the value of the measure of the speed of sound at sea level
TRUE or FALSE?
"The plane of a small circle drawn on the surface of the Earth always lies parallel to the Equator line"
TRUE
FALSE
TRUE or FALSE?
"Parallels of latitude run parallel to the Earth's rotational axis"
TRUE
FALSE
Select the set of words that, when inserted into this the following text, produces a TRUE statement.
"The zero-reference plane from which latitude is measured is the ............................. , from which we measure angular displacement in degrees North or South"
Prime Meridian
Ant-meridian of the Prime Meridian
Equator
Greenwich meridian
What term or phrase is used to describe great circles on the Earth's surface that have both the North and South Poles located on their circumferences?
lines of latitude
lines of longitude
lines of Polar bisectors
