Podcast
Questions and Answers
Time is measured in ______ such as seconds, minutes, and hours.
Time is measured in ______ such as seconds, minutes, and hours.
SI Units
The ______ is suggested for measuring temperature from -10°C to 110°C.
The ______ is suggested for measuring temperature from -10°C to 110°C.
Alcohol thermometer
To measure length accurately, one could use a ______ with an accuracy of ±0.1 cm.
To measure length accurately, one could use a ______ with an accuracy of ±0.1 cm.
Metre Rule
The unit for measuring mass is the ______, which can be represented in tonnes or grams.
The unit for measuring mass is the ______, which can be represented in tonnes or grams.
Volume can be measured in cubic ______ or cubic centimetres.
Volume can be measured in cubic ______ or cubic centimetres.
Flashcards
What is a physical quantity?
What is a physical quantity?
A physical quantity is a property of an object or system that can be measured and expressed numerically. Examples include time, length, mass, volume, and temperature.
What is a measuring instrument?
What is a measuring instrument?
A measuring instrument is a tool used to measure a physical quantity. Each instrument is designed for specific measurements, such as length, mass or time.
What is Accuracy?
What is Accuracy?
Accuracy refers to how close a measurement is to the true or accepted value of the physical quantity.
What is Temperature?
What is Temperature?
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What is the difference between a digital stopwatch and an analogue stopwatch?
What is the difference between a digital stopwatch and an analogue stopwatch?
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Study Notes
Common Physical Quantities
- Common physical quantities measured in a chemistry lab include time, temperature, length, mass, and volume.
Suitable Apparatus
- Time: Digital stopwatches (accurate to 0.01s) or analogue stopwatches (accurate to 0.15s) are suitable.
- Temperature: Alcohol thermometers, suitable for the range from -10°C to 110°C, and digital laboratory thermometers are better suited for measuring temperature. Oral digital thermometers can measure body temperatures.
- Length: A metre rule which provides accuracy up to 0.1cm, and measuring tapes with accuracy from 0.1cm to 0.5cm for different lengths are suitable.
Apparatus Choice
- The appropriate apparatus depends on both the length and the required accuracy.
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Description
Explore the common physical quantities used in chemistry labs, including time, temperature, length, mass, and volume. This quiz covers the suitable apparatus for each measurement type and the importance of accuracy in laboratory settings. Test your knowledge on the optimal tools for accurate measurements in chemistry.
