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9 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Measuring Mass |
S.I. unit: kilogram (kg) Smaller mass: gram (g) Heavy object in industry:tonne (t) 1kg = 1000g 1tonne = 1000kg Measurement tool: beam balance or an electronic balance Electronic balance measure an accuracy up to 0.01g (2 d.c.) |
S.I. unit: 3 different unit Measurement tools: 2 tools |
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Measuring Time |
S.I. unit: second (s). Other units: minute (min) and hour (h) 1h = 60min 1min = 60s Measurement tools: stopwatch or stopclock analogue stopwatch has an accuracy of 0.1s (1 d.p.) digital stopwatch has an accuracy of 0.01s (2 d.p.) |
S.I. unit: 3 different unit Measurement tools: 2 tools |
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Measuring temperature |
S.I unit: kelvin (k) Other unit: degree celsius (*C) K = *C +273 Measurement tools: a mercury thermometer or an alcohol thermometer Accuracy of theme thermometer is 0.5*C |
S.I. unit: 2 different unit Measurement tools: 2 tools |
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Measuring Volume |
S.I. unit: cubic metre (m*3) other unit: cubic centimetre (cm*3) and cubic decimetre (dm*3) 1m*3 = 1000dm*3 1dm*3 = 1000cm*3 Measurement tools: Measuring cylinder : measures to the nearest 0.5cm*3 e.g. 41.5cm*3 or 99.0cm*3 Burette: 1)accurately measures out the volume of a liquid to the nearest 0.05cm*3 2)scale marked (graduated) in 0.1cm*3 division 3) used to deliver different volumes of liquids e,g, 24.00cm*3 or 38.95cm *3 pipette: Accurately measures out fixed volumes of liquids e.g. 20.0cm*3 or 25.0cm*3 |
S.I. unit: 3 different unit Measurement tools: 3 tools |
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Measure volumes of gases |
Measurement tool: gas syringe The gas syringe measures a maximum volume of 100cm*3 |
N/A |
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Methods of collecting gases |
1) Displacement of water 2) Downward delivery 3) Upward delivery |
3 methods |
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Displacement of water |
Suitable for collection gases that are insoluble in water. E.g. Carbon dioxide, hydrogen, or oxygen can be collected by this method |
Water---> solubility 3 gases that can be collected |
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Downward delivery |
Suitable to collect gases that are soluble in water and must be denser than air e.g. chlorine ,hydrogen chloride and sulfur dioxide *the collection of poisonous gases should be carried out in a fume cupboard* |
No water---> solubility downward --> air vs water density 3 gases that can be collected |
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Upward delivery |
Suitable to collect gases that are soluble in water and less dense than air e.g. Ammonia |
No water---> solubility upward --> air vs water density 1 gases that can be collected |
