Measuring

Measuring

by Abigail Rees

What are measurements?

​Beth yw mesuriadau?

In this lesson, we are going to...

• ​Understand (deall) what a measurement is and the different units of measurement.

• ​Practice (ymarfer) using a ruler when measuring.

• ​Understand (deall) how we measure different objects.

• ​

​What is a measurement?

1. ​You can measure the size or weight of an object.

2. ​You can measure how hot or cold something is.

3. ​You can measure how loud something is.

4. These are all different types of measurements.

​It is the action of measuring something.

mae'n weithred o fesur rhywbeth.​

​Today, we are just thinking about measuring the size of an object.

​To be able to measure the size of an object we need to understand what measurement units are.

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​You will need your ruler!

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​Bydd angen eich pren mesur arnoch chi!

​Measurements on the ruler

• ​The smallest measurement is called a millimetre (milimetr).

• ​There are 10 millimeters in 1 centimetre (centimetr).

• ​So if an object is 200 millimetres high, another way of saying it would be 20 centimetres high.

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​When we write millimetres or centimetres in shorthand, we use mm or cm.

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​So lets have a go at some questions (cwestiynau)?

Multiple Choice

This ruler is 10 centimetres long, how many millimetres are in 10 centimetres? 

• 1

• 50

• 100

Multiple Choice

There are 10 mm in 1 cm. The ruler you have is 30cm long, how many millimetres is this?

• 300mm

• 20mm

• 3mm

• 100mm

​When we measure an object, there are 3 things we need to remember!

1. ​Height (taldra) - this is how tall something is.

2. ​Length (hyd)- this is from end to end of the object.

3. ​Width (lled) - this is from side to side of the object.

​Now let's measure/mesur!

​So, what's next?

​millimetre and centimetre is for measuring smaller objects but if we need to measure bigger objects - we need a bigger unit of measurement.

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​This is when we would use a metre/metr.

​What is a meter/metr?

• ​In 1 metre there is 100 centimetres.

• ​In 1 metre there is 1000 millimetres.

• ​If you needed to measure a wall, path or a large object - A meter is the way to go!

Multiple Choice

I want to build a garden wall, the length of the wall is 300cm.  What is this in metres? 

• 1 meter

• 10 meters

• 3 meters

• 30 meters

​Task Time!

​Amser Tasg!

​Let's recap!

​So, what have we learnt?

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​Felly, beth rydyn ni wedi'i ddysgu?