Learning Objectives
- Compare containers as holding more or less
- Understand the idea of capacity — how much a container can hold
- Measure capacity using non-standard units like cups and mugs
- Arrange containers from smallest to largest capacity
- Estimate which container holds more water
Key Concepts
What is Capacity?
Capacity means how much liquid a container can hold. A jug can hold more water than a cup. A bucket can hold more water than a jug. A swimming pool holds the most water. We compare containers by checking which one can hold more liquid inside.
Comparing Capacity
To compare two containers, fill one container with water and pour it into the other. If the water overflows from the second container, the first one holds more. If the second container still has space, the first one holds less. If the water fills the second container exactly, both hold the same amount.
Measuring with Cups
We can use a small cup to measure how much a big container holds. Fill the cup and pour it into the big container. Keep counting how many cups it takes to fill the container. If a jug holds 5 cups of water, its capacity is 5 cups. If a bucket holds 20 cups of water, its capacity is 20 cups.
Full, Half Full, and Empty
A container can be full (completely filled), half full (filled to the middle), or empty (nothing inside). When we pour water from a full glass, the glass slowly becomes empty. When we fill it back, it becomes full again.
Ordering Containers
We can put containers in order by how much they hold. From smallest to largest: a spoon, a cup, a glass, a mug, a jug, a bucket, a tank. The spoon holds the least and the tank holds the most.
Important Terms
- Capacity: The amount of liquid a container can hold
- Full: A container that is completely filled
- Empty: A container that has nothing inside
- Half full: A container that is filled halfway
- Pour: To move liquid from one container to another
- Container: Something that can hold liquid, like a cup, jug, or bucket
Quick Revision
- Capacity is how much liquid a container can hold
- We compare capacity by pouring water from one container to another
- Use a cup to measure how many cups fill a larger container
- A container can be full, half full, or empty
- Order: spoon holds least, bucket holds more, tank holds the most
- Try filling different containers at home to compare their capacity