B1and B2

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B1and B2 by Mind Map: B1and B2

1. What do we measure?

1.1. -Examples

1.2. -Lenght

1.3. -Time

1.4. -Volume

1.5. -Temperature

2. How do we measure?

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

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

3. The SI unit of Lenght

3.1. Metre

3.2. Sybol: m

4. What intruments do we use to measure lenght?

4.1. For measuring shot lenghts:Ruler

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

5. What intruments do we use to measure lenght.

5.1. For measuring diameters of calipers.

5.2. -External calipers:Measure the external diameter of objects.

5.3. -Internal calipers:Measure the internal diameter.

6. Area:amount of space taken up by the surface of an object.

7. Volume:

7.1. SI Unit:cubic metre

7.2. Cubic centimetres

7.3. The amount of space a substance occupies

8. The SI unit of Mass

8.1. Kilogram(kg)

8.2. Measurement we use a

8.3. Double beam balance

8.4. Electronic balance

9. The SI unit of Time

9.1. Seconds

10. Temperature

10.1. tells us how hot or cold it is

10.2. Common Unit:Degree Celsius

10.3. Instruments used:Thermometers

11. speed

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

11.2. speed depends on 2 quantities

11.3. Distance(Km/m)

11.4. Time(h/min/s)

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

12. average speed

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

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

13. Density

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