1. Homework – Map Ratios – for Tuesday 12 th Jan STP 8 Page 100 Exercise 5d 1,3,5,7,9,10

2. Pg 100 Ex 5d 1,3,5 Find the map ratio of the maps in the following questions 1.2cm on the map represents 1km 2cm : 1km 1km = 100 000 cm 2 cm : 100 000 cm 2 : 100 000 Ans  1 : 50 000 Drop the units Divide by 2

3. Pg 100 Ex 5d 1,3,5 Find the map ratio of the maps in the following questions 3. 10km is represented by 10cm on the map 10 cm : 10 km 1km = 100 000 cm  10km = 1 000 000 cm 10 cm : 1000 000 cm Ans  1 : 100 000 Drop the units

4. Pg 100 Ex 5d 1,3,5 Find the map ratio of the maps in the following questions 5. ½ cm on the map represents 500 m 0.5 cm : 500 m 1m = 100cm  500 m = 500 x 100 = 50 000cm 0.5 cm : 50 000 cm 5 : 500 000 Ans  1 : 100 000 - Get rid of point (x 10) -Drop units Divide by 5

5. Pg 100 Ex 5d 7,9,10 7. The map ratio of a map is 1 : 50 000. The distance between A and B on the map is 6cm. What is the true distance between A and B MAP : ACTUAL 1 : 50 000 6 : ? The true distance between A and B is 300 000 cm or 3km x 6 300 000

6. Pg 100 Ex 5d 7,9,10 9. The map ratio of a map is 1 : 10 000. Find the actual length represented by 2cm MAP : ACTUAL 1 : 10 000 2 : ? The actual length is 20 000cm or 200m x 2 20 000

7. Pg 100 Ex 5d 7,9,10 10. The map ratio of a map is 1 : 2 000 000. Find the distance on the map which represents an actual distance of 36km MAP : ACTUAL 1 : 2 000 000 ? : 36 km 36 km = 3 600 000 The distance on the map is 1.8 cm 3 600 000 x 1.8 1.8

8. Any Questions?? You only need to change units the numbers you are comparing have different units New whiteboards! More Practise!

9. On a map 1cm represents 2km. What distance on the map will represent a real distance of 12 km MAP : ACTUAL 1 cm : 2 km ? : 12 km x 6 6cm

10. A map has a scale of 1 : 25 000. How much is a distance of 10cm on the map, in real life? Give your answer in metres! MAP : ACTUAL 1 : 25 000 10 : ? x 10 250 000 2 500 m

11. On a map 1 cm represents 5 km. Work out the real distance between two towns if their distance apart on the map is 4.2 cm MAP : ACTUAL 1 cm : 5 km 4.2 : ? x 4.2 21

12. A map has a scale of 1 : 25 000. How much is a distance of 175 000 cm in reality shown on the map Give your answer in centimetres! MAP : ACTUAL 1 : 25 000 ? : 175 000 x 7 7

13. A map has a scale of 1 : 10 000. Work out the distance on the map between two towns if the real distance is 7 km MAP : ACTUAL 1 : 10 000 ? : 700 000 x 70 70

14. The scale of a map is 1 : 20 000. On the map, the distance between two towns is 9cm. Work out the real distance between the towns. Give your answer in kilometres MAP : ACTUAL 1 : 20 000 9cm : ? x 9 180 000 1.8 km

15. Homework Pg 101 Ex 5d No. 11 Pg 111 Revision Exercise 1.3 No.10 b)