## Scales, Tables and Graphs Exercise

1. This table shows information about the earth's four oceans.

 Ocean Area (km2) Area (square miles) Average depth (m) Average depth (ft) Arctic 13 230 000 5 110 000 1 205 3 950 Pacific 166 240 000 64 190 000 4 188 13 740 Indian 73 430 000 28 350 000 3 872 12 700 Atlantic 86 560 000 33 420 000 3 736 12 260
 a. Which ocean has the greatest area?b. Which ocean would appear to be the deepest?c. List the oceans in order from smallest area to largest area.d. Use the table to find out how many km2 there are in a square mile.e. Use the table to find out how many feet there are in a metre.

 2. The scale (x 1000) shows the number of revolutions of an engine. Give each reading to one decimal place e.g. 4.8 a. Give the reading shown by the green pointer.b. Give the reading shown by the blue pointer.c. Give the reading shown by the black pointer.d. Give the reading shown by the red pointer.e. Give the reading shown by the purple pointer.

3. The chart gives the high tide times and the change between high tide and low tide, in metres, at two seaside towns for a week.

 Day of week Bluesville Greentown am m pm m am m pm m Monday 1.30 2.7 2.10 2.8 4.20 2.6 5.00 2.7 Tuesday 2.30 2.8 3.10 2.9 5.40 2.7 6.10 2.9 Wednesday 3.40 2.9 4.20 3.0 6.50 2.9 7.10 3.1 Thursday 4.50 2.9 5.20 3.1 7.40 3.1 8.10 3.4 Friday 5.50 3.1 6.20 3.2 8.30 3.4 8.50 3.6 Saturday 7.40 3.2 8.10 3.3 10.20 3.6 10.40 3.7 Sunday 8.40 3.3 9.00 3.4 11.00 3.7 11.20 3.8

a. At what time and where was the lowest tide?
b. On what day and where was the biggest tide?
c. On how many days was the average of the tides in Bluesville greater than the average of the tides in Greentown?
d. What was the time difference between high tides in Greentown on Friday?
e. What was the difference (in hours), in time between the first high tide in Bluesville and the last?

4. The graph shows the temperatures in some of the towns and cities in the Pacific region on a particular day in Spring.

a. Estimate the difference between the high and low temperatures for Suva.
b. Which town or city had the greatest difference between high and low temperature?
c. Use the graph to estimate the average low temperature on this day in Honolulu, Nadi and Noumea.
e. Four towns or cities had the same high temperature. Which ones were they?

5. The chart shows some conversions between metric units and imperial units for measuring length.

 Centimetres Inches Metres Yards Kilometres Miles 2.540 1 0.394 0.914 1 1.094 1.609 1 0.621 12.700 5 1.969 4.572 5 5.468 8.047 5 3.107 25.400 10 3.937 9.144 10 10.936 16.093 10 6.214 50.800 20 7.874 18.288 20 21.872 32.187 20 12.427 127.000 50 19.685 45.720 50 54.681 80.467 50 31.069 254.000 100 39.370 91.440 100 109.361 160.934 100 62.137

a. How many kilometres in 50 miles?
b. How many inches in 10 cm?
c. How many metres in 30 yards?
d. How many metres in a 880 yard race. (The old Olympic distance)
e. For experts! Use the chart to calculate how many centimetres in 1 mile. (Clue: There are 36 inches in a yard and 1760 yards in a mile)

6. The scale below shows a ruler.

Find the measurement given at each of the following points:

a. A
b. B
c. C
d. D
e. E

7. The table below shows weather conditions and temperatures in towns and cities around the Pacific region one day in Spring.

 City Conditions High Low Adelaide showers 17o 13o Auckland fine 16o 9o Apia thunder 30o 24o Honolulu fine 30o 23o Nadi fine 31o 22o Noumea fine 28o 21o Papeete fine 31o 24o Perth fine 24o 10o Port Moresby fine 31o 26o Suva thunder 31o 22o

a. Which, would you say, was the warmest place from the table above?
b. What is the difference between the high and low temperatures in Honolulu?
c. In which city was the biggest difference between the high and low temperatures?
d. There is a small fault in the table, what is it?
e. Describe the advantages and disadvantages of using the table and the graph (in question 4) for finding information.