secondary 1 na geography e learning (7th august 2012)

E-LEARNING7TH AUGUST 2012

Secondary 1 NA Geography

Instructions

You must view this powerpoint slides as a Slide Show.

You need to have your textbook with you and be prepared to highlight notes.

You need to log in to your LMS to access the questions.

For today’s session…

You will be recapping on what you learnt for atlas (page 35)

You will be recapping on how to read scale on a map.

You will be learning some basic map skills Eastings and northings Four-figure grid references Six-figure grid references Finding directions on a map

Question 1

You are to revise what you learnt for atlas on page 35 – 39 before you do it.

You may refer to the textbook while you’re doing the question.

TEXTBOOK PAGE 31

Recap on Scale

What is scale? (page 31)

The scale of a map shows the relationship between a length on a map and the

actual distance it represents on the Earth’s surface. (Paragraph 1, line 2)

The scale of a map shows the relationship between a length on a map and the

actual distance it represents on the Earth’s surface. (Paragraph 1, line 2)

Why do we need a scale when drawing a map?

Impossible for us to draw a map the same size as the

actual area.

Impossible for us to draw a map the same size as the

actual area.

Statement scaleStatement scale Line scaleLine scale

1 cm represents 1 km

How scale is shown on a map (page 31)

Large-scale mapLarge-scale map Small-scale mapSmall-scale map

Smaller area of Earth’s surface

More details

Larger area of Earth’s surface

Less details

Large-scale map VS Small-scale map

Small-scale map Large-scale map

TURN TO PAGE 45 OF YOUR TEXTBOOK

Chapter 5: Interpreting Topographical maps

As you are going through this, please highlight in your

textbook.

What is the definition of a topographical map?

Read the paragraph on page 45A topographical map is an accurate large-scale maps that gives details of the physical and human features in an area.

What are the uses of a topographical map?

You can find the answer on page 45

You use a topographical map to locate specific places, as well as to understand physical and human environment.

PAGE 46 OF YOUR TEXTBOOK

Eastings and Northings

Eastings VS Northings

Read paragraph 1 and 2 of page

46

Eastings VS NorthingsThe numbers here

are increasing towards North

direction, thus they are called

Northings.

The numbers here are increasing towards North

direction, thus they are called

Northings.

The numbers here are increasing towards East

direction, thus they are called Eastings.

The numbers here are increasing towards East

direction, thus they are called Eastings.

PAGE 46 OF YOUR TEXTBOOK

Four figure grid reference

What is four figure grid reference?

It is a set of four numbers that is made up of Northings and Eastings.

You should read EASTINGS FIRST followed by NORTHINGS.

Remember: E comes earlier than N.Eg. 0450 – 04 is the easting and 50 is the northing.

Four figure grid referenceStep 1: For example, I

want to identify the four figure grid

reference of this box.

Step 1: For example, I want to identify the

four figure grid reference of this box.

Four figure grid referenceStep 2: Draw a

cross at the BOTTOM LEFT CORNER of the

box.

Four figure grid reference

Read the corresponding grid lines. Should your answer be 0657 or

5706?

Read the corresponding grid lines. Should your answer be 0657 or

5706?

If you said 0657…

Give yourself a pat on your back. You’re right. IF you got this

wrong, please go back to slide 19 and

revise.

PAGE 47 OF YOUR TEXTBOOK

Six figure grid reference

What is six figure grid reference?

Six figure reference is like a more detailed version of a four figure grid reference.

As the name suggests, there are SIX numbers.

06 57Easting

Easting

Northing

Northing

The dotted boxes refers to

the special numbers that

give the EXACT position of the

feature you want to find in

the map.

Six figure grid referenceStep 1: For example, I

want to identify the six figure grid

reference of this box.

Step 1: For example, I want to identify the

six figure grid reference of this box.

Six figure grid reference

Step 2: Zoom into that

particular box

Step 2: Zoom into that

particular box

Six figure grid referenceYou would know from earlier that

the four figure grid

reference is 0657 . Now we need to find the 2

special numbers.

5

5

Step 1: Draw the mid points

as shown.

Step 1: Draw the mid points

as shown.

Step 2: Divide the grid

square into ten equal

parts.

Step 2: Divide the grid

square into ten equal

parts.

0 1 2 3 4

6 7 8 9 0

4

3

2

1

09

8

7

6

Six figure grid reference

5

50 1 2 3 4

6 7 8 9 0

4

3

2

1

09

8

7

6

Look at where your feature

coincides with the numbers you

have drawn. Estimate

somewhere in the middle of

the feature will do.

Look at where your feature

coincides with the numbers you

have drawn. Estimate

somewhere in the middle of

the feature will do.

063574

The six figure grid reference for Solis Lake

is…

Northing Easting

Special number that gives exact

location.

Special number that gives exact

location.

NOW YOU NEED TO ATTEMPT THE QUIZ ON THE LMS. YOU CAN REFER TO THE SLIDES

TO HELP YOU.

You are done!