How fast are the rainforests being cut down?

a note for teachers


This exercise teaches you how to use Excel and Microsoft Map to draw a map that shows how fast the world's rainforests are being destroyed. It might seem complicated, so be patient and follow the instructions very carefully! It will be easier to try and keep both Excel and this web page open at the same time. Ready to go?

1 First you need to start Excel and copy all the data below (including the empty cells) into a new spreadsheet.

Country
Area of rainforest (km2)
Annual rate of deforestation (%)
Annual forest loss (km2)
Angola
231000
.7
 
Cameroon
197000
.6
 
Central African Republic
168000
.4
 
Congo
182000
.2
 
Zaire
1224000
.6
 
Gabon
215000
.7
 
Madagascar
62000
.8
 
Nigeria
116000
.7
 
India
43000
.6
 
Indonesia
844000
1
 
Malaysia
93000
2
 
Myanmar
184000
1.3
 
Papua New Guinea
311000
.3
 
Bolivia
493000
1.2
 
Brazil
2943000
.6
 
Colombia
531000
.7
 
Guyana
184000
.1
 
Mexico
397000
1.3
 
Peru
742000
.4
 
Venezuela
440000
2.1
 
Data from World Conservation Monitoring Centre 1997 and taken from Earthworks 2 teachers guide by John Widdowson and published by John Murray


stage 2

2 Calculate the annual forest loss in km2 by multiplying the area of rainforest by the annual rate of deforestation and dividing by 100.  Excel will do this for you if you do the following:

Click on cell D2 first and type (or copy and paste) the following formula into the Formula bar  =B2*C2/100

It should look like this:
The formula bar ( = means the start of a formula, * = multiply and /  = divide)  

Press Enter, and Excel works out the calculation (which should be 1617)

stage 4

3 Click on cell D2 to highlight it, and then drag the small square in the bottom right side of the cell downwards to replicate the formula (do the same calculation for the rest of the data)

Replicate the formula

stage 5

4 Highlight all cells containing data and click the map icon. Microsoft Map icon If the icon is not visible click Insert / object / Microsoft map. Draw a rectangle with the mouse to the size you wish your map to be. If a box appears saying that Excel is unable to create a map, make sure that you have selected the cells containing the names of the countries.

stage 6

5 Excel hopefully draws a map of the world showing the countries in the spreadsheet! The map control box should be open:

Map Control box
This is the map control box
. if you can't see it, this button Map Control icon brings it up!

The map shows the area of rainforest in each country - to change this to show annual forest loss, put the mouse over the annual forest button and a 'handle' appears. Drag the handle onto the grey box in the window underneath and the data on the map should change

stage 7

6 Add and format a title for the graph by right clicking on the title and selecting "format font".

stage 8

7 The colour of the shading on the map can be adjusted by clicking map / value shading options and selecting a different colour. Choose 4 in the box that shows number of value ranges. By now your map should look something like this:

example of a map      click map to enlarge

stage 9

8 There are several other things you can do with your map. Remove the latitude and longitude lines from the map lines from the map to make it easier to read. Click on the map with the right mouse button and select features. Remove the tick from the world graticule box. You can use the map labeller to label selected countries if you wish. This is the button to use: Map labeller button

stage 10

9 Try adding a symbol to show the amount of forest in each country. Hint - use the map control box and drag the pink star symbol into the format box. Now you can add the amount of forest data by dragging it onto the star symbol. This will help you decide if countries with more forest are have the most rapid deforestation rates. Here is an example:

10 Add another calculation to your spreadsheet to show how long it might take each country to lose all their forests. Show this on a new map.

 

ASSESSMENT TASK:

  • Copy your finished map into a new Word or Publisher document.

  • Write a description of your map to show what you have learned by answering the following questions:

    Which countries have the most / least rainforest?

    Which countries cut down most / least rainforest in a year?

    Which countries will cut down all their rainforest within 50 years?

    How long will Brazil's rainforest last for?

    Compare the area of rainforest with annual rate of deforestation (%) and annual forest loss (km2) in different countries. What patterns do you notice?

    Why are the world's rainforests being cut down?
    Use these links to add some pictures to your work and to research further:

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This exercise is copyright N Jenkins and may not be reposted without permission.Revised 21/6/01