1.1 Length and time LOs: • Use and describe the use of rules and measuring cylinders to find a length or a volume • Use and describe the use of clocks and devices, both analogue and digital, for measuring an interval of time
Supplement • Understand that a micrometer screw gauge is used to measure very small distances

Activity Measure at least 5 lab equipment without using any measuring device such as a ruler, measuring cylinder.
1. What are the lab equipment that you have chosen to measure?
2. What sort of things have you used to measure the lab equipment?
3. Do you know what is the most distance galaxy ever measured? Can you measure the distance using a regular ruler? What measurement do you use? What is the unit of it?
4. Do you think they are reliable for accurate or precise measurement?
5. What can you think of to prevent any mistakes/errors to measure a material?

Task Find the thickness of your notebook paper and the size of a head of iron nail.

Caliper: an instrument for measuring the distance between two point

Video clip: Metric and standard measurement from Youtube.com 1. Make a list of the SI Units. 2. Learn how to use a vernier caliper and micrometer.

How to use a vernier caliper?

How to use a micrometer? from Youtube.com

Homework by Wednesday ( Due G1:Monday 15 Aug. G2:Tuesday16 Aug)

1. Read text p14, 15 and take notes
2. Do questions 1, 2 and 3 (p15)

LO: Obtain an average value for a small distance and for a short interval of time by measuring multiples (including the period of a pendulum) Pendulum Experiment

Length

Time for 20 oscillations

Period

T2

l/m

t/second

T/s

T2/s2

0.600

0.700

0.800

0.900

1.000

Length

Time for 20 oscillations

Period

T2

l/m

t/second

T/s

T2/s2

0.600

0.700

0.800

0.900

1.000

Q1. Describe how you would find the thickness of a sheet of paper by using a micrometer. Check zero point. Close micrometer onto paper. Lock the micrometer. Take the reading of both scales of barrel and thimble.

Q2. Describe how you can make the above experiment a fair test. Try the above procedure several times. Measure the thickness of paper using several sheets of paper then divided it by the number of piece of paper.

Q3. Describeand explainwhy howyou would determine the period as accurately as possible. Measure the time for 20 complete oscillations, divide the measured time by 20. The reason why we measure the time for 20 swings then divides it by 20 is to make the measurement more accurate.

1.4 Density

LO: • Recall and use the equation ρ =m/V • Describe an experiment to determine the density of a liquid and of a regularly shaped solid and make the necessary calculation • Describe the determination of the density of an irregularly shaped solid by the method of displacement • Predict whether an object will float based on density data

The density of an object is relative to two things;

Example)
2000 kg of water occupies 2m3 of volume
Its density is
ρ = 2000/2 = 1000kg/m3

Activity Measure the density of different materials such as a rock, milk, an apple and a piece of toast bread.

Task Design a practical write up to investigate the density of different 3 materials including a solid, a solid in irregular shape and liquid material).

Extension: Describe the determination of the density of an irregularly shaped solid by the method of displacement, and make the necessary calculation

1.1 Length and time1. General physicsLOs:

• Use and describe the use of rules and measuring cylinders to find a length or a volume

• Use and describe the use of clocks and devices, both analogue and digital, for measuring an interval of time

Supplement

• Understand that a micrometer screw gauge is used to measure very small distances

ActivityMeasure at least 5 lab equipment without using any measuring device such as a ruler, measuring cylinder.1. What are the lab equipment that you have chosen to measure?

2. What sort of things have you used to measure the lab equipment?

3. Do you know what is the most distance galaxy ever measured? Can you measure the distance using a regular ruler? What measurement do you use? What is the unit of it?

4. Do you think they are reliable for accurate or precise measurement?

5. What can you think of to prevent any mistakes/errors to measure a material?

TaskFind the thickness of your notebook paper and the size of a head of iron nail.Caliper: an instrument for measuring the distance between two point

Video clip: Metric and standard measurement from Youtube.com

1. Make a list of the SI Units.

2. Learn how to use a vernier caliper and micrometer.

Homework by Wednesday ( Due G1:Monday 15 Aug. G2:Tuesday16 Aug)

1. Read text p14, 15 and take notes

2. Do questions 1, 2 and 3 (p15)

Significant figuresfrom GCSE BitesizeLO: Obtain an average value for a small distance and for a short interval of time by measuring multiples (including the period of a pendulum)

Pendulum ExperimentQ1. Describe how you would find the thickness of a sheet of paper by using a micrometer.Check zero point.

Close micrometer onto paper. Lock the micrometer.

Take the reading of both scales of barrel and thimble.

Q2. Describe how you can make the above experiment a fair test.Try the above procedure several times.

Measure the thickness of paper using several sheets of paper then divided it by the number of piece of paper.

Q3. Describeand explainwhyhowyou would determine the period as accurately as possible.Measure the time for 20 complete oscillations, divide the measured time by 20. The reason why we measure the time for 20 swings then divides it by 20 is to make the measurement more accurate.

LO:1.4 Density• Recall and use the equation ρ =m/V

• Describe an experiment to determine the density of a liquid and of a regularly shaped solid and make the necessary calculation

• Describe the determination of the density of an irregularly shaped solid by the method of displacement

• Predict whether an object will float based on density data

The density of an object is relative to two things;

- MASS
- VOLUME

It can be calculated like this;Image from http://erinschumacher.com

## ρ = m/V

ρ (rho)is density,m is mass,

V is volume

units of density are kg/m3 , kgm-3 or g/cm3

Example)

2000 kg of water occupies 2m3 of volume

Its density is

ρ = 2000/2 = 1000kg/m3

ActivityMeasure the density of different materials such as a rock, milk, an apple and a piece of toast bread.TaskDesign a practical write up to investigate the density of different 3 materials including a solid, a solid in irregular shape and liquid material).Extension:Describe the determination of the density of an irregularly shaped solid by the method of displacement, and make the necessary calculation