Students often refer to Class 4 Maths Notes and Chapter 8 Weigh it, Pour it Class 4 Notes during last-minute revisions.
Class 4 Maths Chapter 8 Notes Weigh it, Pour it
Class 4 Maths Notes Chapter 8 – Class 4 Weigh it, Pour it Notes
→ Weight determines how heavy an object or quantity of a substance is. An object with more weight is considered heavy, like an elephant or a bus. On the other hand, an object of less weight is called light. A feather, a leaf, and a bubble are all light in weight. We also measure the weight of one heavier object in terms of other lighter objects using a balance.
→ To measure the weight of objects accurately, we use the standard units of weight. The weight of objects is normally measured in kilogram (kg). Weights of smaller or lighter objects are measured in gram (g) and milligram (mg).
→ The amount that a pan, bottle, or any other container can hold is called its capacity. Sometimes, we measure the capacity of a large container in terms of other smaller containers. Glasses and spoons are non-standard units of measuring capacity.
→ For example, 1 pot of milk can be poured into 6 glasses, that means, the capacity of the pot is the same as the capacity of 6 glasses. This gives us a rough estimate, not an accurate measurement. So, we use the standard units ‘litres (1)’ and ‘millilitres (ml)’ to measure the capacity of liquid.
→ Objects such as cups, spoons, pebbles, and blocks, used for measurement are called non-standard units of mass (weight).
→ Kilogram (kg) and gram (g) are standard units that are used to measure weight of an object.
→ Gram (g) is a smaller unit that is used to measure the weight of lighter objects such as an orange, a soap bar, a coin, etc.
→ Kilogram (kg) is used to measure the weight of heavy objects such as bags of vegetables, boxes of fruits, flour, rice, etc.
→ If we put 1000 grams together, we get 1 kilogram. So, 1000 g = 1 kg or 1 kg = 1000 g.
500 g = \(\frac{1}{2}\) kg, 250 g = \(\frac{1}{4}\)kg
→ The weights of grams and kilograms used for measuring weight while buying vegetables and fruits are given:
→ We measure small quantities of liquid in millilitres (ml) and large quantities of liquid in litres (l).
→ The capacity of a cup of tea, medicine in an injection, and an ink bottle are measured in ml.
→ The capacity of a water can, a bath tub full of water, oil drum are measured in l.
→ Here are the different measuring vessels of different measures to measure capacity.
1000 ml = 1 l, 500 ml = \(\frac{1}{2}\) l, 250 ml = \(\frac{1}{4}\) l
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