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Questions and Answers
What is a common method of measuring temperature in the Caribbean and Europe?
What is a common method of measuring temperature in the Caribbean and Europe?
- Placing the elbow in the liquid
- Measuring the length of an arm
- Degree Celsius (correct)
- Using the metric system
Why were early methods of measuring physical quantities inaccurate?
Why were early methods of measuring physical quantities inaccurate?
- Because of the reliability of human senses
- Due to the different types of units used in different parts of the world (correct)
- Because of the use of the metric system
- Because of the lack of standard instruments
What is a limitation of estimating physical quantities?
What is a limitation of estimating physical quantities?
- It is only used in the Caribbean
- It requires a lot of equipment
- It is a slow process
- It relies on the use of our senses which are not reliable (correct)
What is the name of the system of units adopted by scientists since 1960?
What is the name of the system of units adopted by scientists since 1960?
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What is an example of a standard instrument used in the metric system?
What is an example of a standard instrument used in the metric system?
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What is the unit of measurement used for length in the metric system?
What is the unit of measurement used for length in the metric system?
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Study Notes
Measurement in Everyday Life
- In the Caribbean and Europe, the unit degree Celsius is used to measure temperature.
- Centimetres and millimetres are used to measure length when the object is relatively small.
- Time is measured in minutes.
Evolution of Measurement
- In the past, measurement methods were inaccurate due to the use of different units in various parts of the world.
- There was no standard unit, and people used informal methods such as the length of their arm to measure length.
- Temperature was estimated by placing a hand or elbow in a liquid, which was not a reliable method.
- Estimating using senses is not accurate due to individual differences in perception.
- Since 1960, scientists have adopted the metric system as a standard system of units.
- The metric system uses standard units, such as meters for length, and instruments, such as balances for measuring mass.
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