Laboratory Metrology: Scientific Measurement of Mass, Volume, Length, and Temperature
Accurate observation and objective measurement are the cornerstones of scientific discovery. Physical properties of matter can be measured using standardized scientific tools: 'length and dimensions' are measured using rulers or measuring tapes in centimetres (cm) and metres (m); 'mass' is measured using dual-pan or digital balances in grams (g) and kilograms (kg); 'volume of liquids and irregular solids' is measured using graduated cylinders in millilitres (mL) or cubic centimetres (cm³); and 'temperature' is measured using thermometers in degrees Celsius (°C).
📏 Measurement Tools & Standard Units
| Physical Property | Measurement Tool | Common Units | Example Application |
|---|---|---|---|
| Length & Width | Ruler / Measuring tape | Centimetres (cm) / Metres (m) | Measuring classroom width or desk length |
| Mass | Digital / Pan balance | Grams (g) / Kilograms (kg) | Weighing fruit or gold jewelry |
| Liquid Volume | Graduated cylinder | Millilitres (mL) / cm³ | Measuring liquids and water displacement |
| Temperature | Thermometer | Degrees Celsius (°C) | Measuring human body or water temperature |
A graduated cylinder contains 50 mL of water. When an irregular pebble is submerged, the water level rises to 68 mL. What is the volume of the pebble?
Solution: Volume = 68 - 50 = 18 mL (or 18 cm³).
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