2.5.2

Clocks

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Clocks

Humans have used clocks of some kind to tell the time for thousands of years. The round clock face with twelve numbers has to be read in a special way.

Clocks

Clocks

Most clock faces have things in common.
- Twelve numbers or marks to show the hours.
- Divisions to show minutes.
- An hour hand which is shorter and fatter.
- A minute hand which is longer and thinner.
- A second hand which is thinner than the minute hand.

Clock face

Clock hands

Clock hands rotate around the face in a clockwise direction.
If you start at 12 at the top of the clock, the hands move to the right.

Quartering the clock

Quartering the clock

We often divide the clock into quarters or halves.
A quarter of the clock face is a quarter of an hour or 15 minutes.
Half the clock face is half an hour or 30 minutes

Roman numerals

Roman numerals

Many clock faces use roman numerals.
- 1, 2, 3, 4, 5, 6 $\rightarrow$ I, II, III, IV, V, VI
- 7, 8, 9, 10, 11, 12 $\rightarrow$ VII, VIII, IX, X, XI, XII

1

Year 3 - Number

2

Year 3 - Measurement

2.1

Length

2.1.1Length 2.1.2Comparing Lengths 2.1.3Add & Subtract Lengths 2.1.4Perimeter

2.2

Mass

2.2.1Mass 2.2.2Comparing Masses 2.2.3Add & Subtract Masses

2.3

Volume & Capacity

2.3.1Volume & Capacity 2.3.2Comparing Volumes 2.3.3Add & Subtract Volumes

2.4

Money

2.4.1Money 2.4.2Counting Money 2.4.3Adding & Subtracting Money

2.5

Time

2.5.1Units of Time 2.5.2Clocks 2.5.3Telling the Time 2.5.4Time of the Day 2.5.512-Hour & 24-Hour Clocks 2.5.6Measuring Time

3

Year 3 - Geometry

3.1

Angles

3.1.1Angles in Degrees 3.1.2Types of Angle

3.2

Properties of Shapes

3.2.12D Shapes 3.2.23D Shapes

3.3

Straight Lines

3.3.1Straight Lines 3.3.2Parallel & Perpendicular Lines

4

Year 3 - Statistics

4.1

Statistics

4.1.1Statistics 4.1.2Pictograms & Bar Charts

5

Year 4 - Number

6

Year 4 - Measurement

6.1

Units

6.1.1Metric Measurements 6.1.2Adding & Subtracting Money

6.2

Time

6.2.1Converting Units of Time 6.2.2Changing the 12-Hour Clock to the 24-Hour Clock 6.2.3Changing the 24-hour Clock to the 12-Hour Clock

7

Year 4 - Geometry

7.1

Properties of Shapes

7.1.1Symmetry 7.1.2Types of Triangle 7.1.3Quadrilaterals

7.2

Perimeter & Area

7.2.1Perimeter 7.2.2Area

7.3

Position & Direction

7.3.1Coordinates 7.3.2Translation

8

Year 4 - Statistics

8.1

Statistics

8.1.1Types of Data 8.1.2Pictograms & Bar Charts 8.1.3Line Graphs

Jump to other topics

1

Year 3 - Number

2

Year 3 - Measurement

2.1

Length

2.1.1Length 2.1.2Comparing Lengths 2.1.3Add & Subtract Lengths 2.1.4Perimeter

2.2

Mass

2.2.1Mass 2.2.2Comparing Masses 2.2.3Add & Subtract Masses

2.3

Volume & Capacity

2.3.1Volume & Capacity 2.3.2Comparing Volumes 2.3.3Add & Subtract Volumes

2.4

Money

2.4.1Money 2.4.2Counting Money 2.4.3Adding & Subtracting Money

2.5

Time

2.5.1Units of Time 2.5.2Clocks 2.5.3Telling the Time 2.5.4Time of the Day 2.5.512-Hour & 24-Hour Clocks 2.5.6Measuring Time

3

Year 3 - Geometry

3.1

Angles

3.1.1Angles in Degrees 3.1.2Types of Angle

3.2

Properties of Shapes

3.2.12D Shapes 3.2.23D Shapes

3.3

Straight Lines

3.3.1Straight Lines 3.3.2Parallel & Perpendicular Lines

4

Year 3 - Statistics

4.1

Statistics

4.1.1Statistics 4.1.2Pictograms & Bar Charts

5

Year 4 - Number

6

Year 4 - Measurement

6.1

Units

6.1.1Metric Measurements 6.1.2Adding & Subtracting Money

6.2

Time

6.2.1Converting Units of Time 6.2.2Changing the 12-Hour Clock to the 24-Hour Clock 6.2.3Changing the 24-hour Clock to the 12-Hour Clock

7

Year 4 - Geometry

7.1

Properties of Shapes

7.1.1Symmetry 7.1.2Types of Triangle 7.1.3Quadrilaterals

7.2

Perimeter & Area

7.2.1Perimeter 7.2.2Area

7.3

Position & Direction

7.3.1Coordinates 7.3.2Translation

8

Year 4 - Statistics

8.1

Statistics

8.1.1Types of Data 8.1.2Pictograms & Bar Charts 8.1.3Line Graphs

Practice questions on Clocks

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1
How many minutes does a quarter of the clock face show?Multiple choice
2
How many minutes does half of the clock face show?Multiple choice

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Units of Time

Telling the Time