Geography - TDC Term 1

Question 1

what do aerial photograph’s show?

Answer 1

Aerial photographs show the view of land taken from a camera attached under an aeroplane.

Question 2

What do oblique aerial photographs show?

Answer 2

Oblique aerial photographs show the land from above at an angle

Question 3

What do vertical aerial photographs show?

Answer 3

vertical aerial photographs show the land from directly above the earth’s surface.

Question 4

what do vertical aerial photographs do?

Answer 4

they help cartographers view the earth’s surface from the same angle as a map.

Question 5

define contour line

Answer 5

it is a symbolic horizontal line that shows the height and shape of a slope

Question 6

what do we use contour lines for?

Answer 6

we use contour lines on maps to give us information about the height and shape of a landscape feature, e.g. mountains, hills or valleys.

Question 7

what are used to represent objects on the ground?

Answer 7

symbols and colours on maps are used to represent objects on the ground

Question 8

what does each contour line do?

Answer 8

each contour line connects places that have the same height above sea level

Question 9

True or false. the pattern that contours lines on make on a map show the height and feature on land.

Answer 9

true

Question 10

what is contour interval?

Answer 10

it is the distance between each contour

Question 11

name 4 popular features on topographic maps

Answer 11

mountains, hills, spurs and river valleys

Question 12

what does gradient describe?

Answer 12

it describes the steepness of a slope

Question 13

what does steepness do?

Answer 13

it tells us about the angle of the slope

Question 14

if there is a big difference in height, will the slope have a steel or gentle gradient?

Answer 14

it will have a steep gradient

Question 15

give the formula to calculate gradient

Answer 15

Gradient =
Vertical height difference
————————————-
horizontal distance

e.g. if hill has height of 100 meters and vertical height of 1000 meters.

gradient=Vertical height distance = 100m=1
——————————- = ——-=—-
horizontal distance 1000m 10

Question 16

what is gradient described as?

Answer 16

it is described as a ratio

Question 17

what is an orthophoto image?

Answer 17

it is a combination of a vertical aerial photograph and a map

Question 18

how are orthophoto images made?

Answer 18

they are made using info from aerial photographs

Question 19

what do orthophoto images show?

Answer 19

they show place names, contour lines, road numbers and grid coordination

Question 20

what do topographic maps show?

Answer 20

they show features on a piece of land

Question 21

what does topographic mean?

Answer 21

it means that it shows the shape of land on other features

Question 22

what is the scale of all topographic maps?

Answer 22

1:50 000

Question 23

what can be used as symbols on topographic maps?

Answer 23

symbols can be lines, letters, number shaded areas, etc. (revise natural and constructed features)

Question 24

name the 4 ways that height can be shown on topographic maps.

Answer 24

• contour lines
• spot height
• trigonometric beacons
• benchmarks

Question 25

which way do the numbers always face on slopes?

Answer 25

the numbers always face up the slopes, this helps you to see if a slope if sloping up or down

Question 26

what do spot heights do?

Answer 26

they show the exact height in meters, as a number next to the dot

Question 27

what is the symbol for trigonometric beacons

Answer 27

it is a triangle

Question 28

what does the number in italics represent?

Answer 28

it is the number of each beacon

Question 29

what do benchmarks do?

Answer 29

they also show exact height

Question 30

how do you identify benchmarks on a map?

Answer 30

they are shown on maps as a number and arrow also shown in decimal

Question 31

name the 3 different types of scales

Answer 31

• word scale
• line scale
• ratio scale