Learning Objectives
- Understand the concept of capacity (how much a container can hold)
- Compare the capacity of different containers
- Learn about litres (L) and millilitres (mL)
- Estimate and measure the capacity of everyday containers
Key Concepts
What is Capacity?
Capacity means how much liquid a container can hold. A big bucket can hold more water than a small glass. We use special units to measure capacity so that everyone gets the same answer. Capacity is measured in litres and millilitres.
Litres and Millilitres
A litre (L) is used for measuring larger amounts of liquid, like a bottle of water or milk. A millilitre (mL) is used for smaller amounts, like a spoonful of medicine. 1 litre = 1000 millilitres. A large water bottle is usually 1 litre. A small teaspoon holds about 5 mL.
Comparing Capacities
To compare how much two containers hold, you can pour water from one into the other. If a jug fills up 3 glasses, and a pot fills up 5 glasses, then the pot holds more than the jug. You can also read the markings on a measuring cup to find the exact capacity.
Everyday Capacities
A cup of tea is about 150 mL. A glass of water is about 250 mL. A small water bottle is 500 mL (half a litre). A large bottle is 1 litre. A bucket might hold 10 to 15 litres. Knowing these helps you estimate!
Important Terms
- Capacity: The amount of liquid a container can hold
- Litre (L): A unit used to measure larger amounts of liquid
- Millilitre (mL): A unit used to measure smaller amounts of liquid
- Measuring Cup: A cup with markings used to measure liquids
- Container: Anything that can hold liquids, like a bottle, jug, or glass
Quick Revision
- 1 litre = 1000 millilitres
- Half a litre = 500 mL
- A cup of tea is about 150 mL
- A glass of water is about 250 mL
- Use litres for big amounts and millilitres for small amounts
- You can compare capacities by pouring liquid from one container to another