| Question | Answer |
|---|---|
| SI unit of length | metre (m) |
| SI unit of mass | kilogram (kg) |
| SI unit of time | second(s) |
| SI unit of area | metre squared |
| SI unit of volume | metre cubed |
| Used to measure straight lines | Ruler/metre stick |
| Used to measure short curved lines | Opisometre |
| Used to measure long curved lines | Trundle wheel |
| Used to measure diameters or widths of objects | Vernier callipers |
| How to calculate the area of a square or rectangle | Length X Breadth |
| How to calculate the area of an irregular shaped object | Trace outline on graph paper and count squares |
| How to calculate volume of a regular shaped object | Length X Breadth X Height |
| How to calculate volume of a irregular shaped object | Use a graduated cylinder with water or an overflow can and measure the amount of water displaced. |
| How to calculate volume liquids | Pour into graduated cylinder and read volume |
