In Grade 3, we learnt about measuring weight and capacity. Let us explore more about measuring weight and capacity using standard units like kilograms (kg) and grams (g).
Rita and Shabnam went to the market to buy some fruits and vegetables. They observed the vegetable seller weighing vegetables using a pan balance.
We can estimate whether the weight of common fruits and vegetables is less than or more than $1\text{ kg}$, and then verify using a weighing balance:
We often write kg for kilogram and g for gram.
Understanding relationships between different weights:
Depending on the weight of an object, we choose an appropriate unit of measurement:
Mr. Shrinathan, a sweet shop owner, has orders for $1\text{ kg}$ of Kaju-katli. Let's calculate the number of boxes needed for different box capacities:
Different types of weighing machines are used for different purposes (e.g., spring balance, platform balance, digital weighing scale, baby weighing scale).
Let's match some common objects with their estimated weights:
Mirabai Chanu is an Indian weightlifter. She won the silver medal at the 2020 Tokyo Olympics in the Women's $49\text{ kg}$ event. She lifted a total of $202\text{ kg}$.
Capacity is the amount of liquid a container can hold. The standard units of capacity are litres (l) and millilitres (ml).
We often write l for litre and ml for millilitre.
For very small quantities of liquids, we use smaller units and tools:
Some liquids are used in very small quantities at a time:
Commonly used measuring cans for milk and other liquids come in sizes of:
Every drop of water is precious. A small slow drip from a leaking tap or water purifier can waste a significant amount of water over time: