geography flashcards ( contour lines )

(40 cards)

1
Q

What is a landform

A

its a natural phenomenon on the surface of the earth like valley or plateaus

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2
Q

What is a valley

A

bends towards higher values ( uphill )( in a v )

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3
Q

What is a spur

A

contours bend towards the lower values ( downhill )( in a upside down U )

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4
Q

Where does a river flow

A

to the open side of contours

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5
Q

What is a contour lines characteristics

A

it indicates height
its the brown lines on map
20 m apart
outo map its 5
never cross
far apart - gentle
close together - steep slope
if lines touch- cliff

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6
Q

what is the difference in altitude between two contour lines known as

A

contour intervals ( normally 20 m apart )

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7
Q

What is a contour line

A

a line that combines all places with the same altitude above sea level

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8
Q

What makes it possible to see height on maps

A

altitude

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9
Q

What are the other ways of indicating altitude

A

spot heights
benchmarks
beacons
contour lines

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10
Q

What is a slope

A

a slope indicates the steepness of the land

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11
Q

What is the steepness of the slop indicated as

A

gradient

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12
Q

What is concave and convex

A

concave is steep then gentle and convex is gentle then steep

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13
Q

What is an Arial photo

A

photograph taken from an aircraft

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14
Q

What can Arial photographs be distinguished by

A

colour and the angle of the photograph

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15
Q

What are the different types of angles you can take Arial photographs

A

vertical ( 90 )
low oblique ( smaller than 45 )
high oblique ( bigger than 45 )

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16
Q

What is the principle of overlapping Arial photographs

A

to give a clear and complete image

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17
Q

Name a few phenomena of oblique Arial photos

A

communication
topography
vegetation
settlemnet patterns

18
Q

Name an advantage and disadvantage of oblique arial phots

A

show object form the side
cant show scale

19
Q

Name an advantage and disadvantage of vertical photo

A

most objects are visible
black and white images can be confusing

20
Q

What is the aim of overlapping

A

to ensure no objects are left out

21
Q

What is an orthophoto

A

has the charcateristics of a aria photo and a topographical map that are combined to form a orthophoto map

22
Q

Why can distances be calculated correctly on orthophoto

A

It is the correct size (to scale).

It shows things in the right place.

23
Q

Which scale is used at orthophotos

24
Q

How is altitude indicated on orthophotos

A

Contour lines – thin brown lines that connect places with the same height.

Spot heights – small black dots with a number showing exact height (e.g. ● 154 m).

Trig beacons – triangles with height numbers (▲ 210 m).

25
What is a topographical map
indicates the relief of a build of a region
26
What are the elements/ characteristics of a topographical map
has color and symbols build up areas relief / contour lines drainage infastructure vegetation
27
What are the 3 different types of scale
word line ratio scale
28
What m is sea level at
0 meters
29
What is a map
reduced version of the earth on a fla t surface
30
Name six types of maps
road weather political topographical naval geology
31
What is a major problem when drawin g maps
to draw a map from the earth, which is round on a flat surface
32
Which phenomenon can be seen on a topographical map
man made culture
33
List the main processes when drawing a topographical map
Arial photograph, orthophoto, topographical map
34
What is a topographical map
map that shows the build of land by using contour lines
35
How are phenomenas indicated on a map
with map symbols
36
Map symbols are subdivided. Name the different types
point symbol ( form of a point ) line symbol ( form of a line ) area symbol ( form of a bigger area )
37
Name the 5 colours used on a topographical map and as well as what they represent
black- infastructure red- infastructure green- vegetation blue-drainage brown- builds\contours
38
What is scale
scale indicates how many times the map is smaller than reality
39
What is the difference between large scale and a small scale map
large scale has small figures, which shows much detail and covers a small area small scale has large figures, and shows little detail, and covers a large area
40
How do you calculate how many kilometers are represented by 1cm on a map
multiply the scale with the distance ( cm ) on the map and then divide the answer by 100 00 and remember the answer must be in km