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# B1and B2

This is just a demo map that you can delete right away, if you feel like it...

-Examples

-Lenght

-Time

-Volume

-Temperature

## How do we measure?

Using a pre-determined amount as a standard of measurement.

This pre-determined amount, called a unit,is then used as a reference against which all measurements are made.

Metre

Sybol: m

## What intruments do we use to measure lenght?

For measuring shot lenghts:Ruler

For measuring longer lenghts and surfaces that are curved:Measuring Tape.

## What intruments do we use to measure lenght.

For measuring diameters of calipers.

-External calipers:Measure the external diameter of objects.

-Internal calipers:Measure the internal diameter.

## Volume:

SI Unit:cubic metre

Cubic centimetres

The amount of space a substance occupies

## The SI unit of Mass

Kilogram(kg)

Measurement we use a

Double beam balance

Electronic balance

Seconds

## Temperature

tells us how hot or cold it is

Common Unit:Degree Celsius

Instruments used:Thermometers

## speed

speed is the measurement of how fast someone or something moves.

speed depends on 2 quantities

Distance(Km/m)

Time(h/min/s)

SI unit of speed:Metre per second(m/s)

## average speed

It is more useful to measure the average speed than the speed at a particular instand .

Average speed is the TOTAL DIASTANCE travelled divided by the TOTAL take.

## Density

Density od a substance is the mass of the substances per unit volume