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Capacity and Volume: Measuring Liquids

Mathematics Grade 4 Difficulty 3/5

Beginning of the lesson

Understanding Capacity and Volume

What is Capacity? Capacity is how much liquid a container can hold. When we measure capacity, we're finding out how much space is inside a container for liquids like water, juice, or milk!

Units of Capacity

Liter (L)

A liter is the main unit we use to measure capacity. Think of a large water bottle - that's about 1 liter!

  • Symbol: L
  • Used for: larger amounts of liquid
  • Example: A big bottle of soda is 2 liters
Milliliter (mL)

A milliliter is a much smaller unit. It takes 1,000 milliliters to make 1 liter!

  • Symbol: mL
  • Used for: smaller amounts of liquid
  • Example: A teaspoon holds about 5 mL
Remember: 1 L = 1,000 mL

Visual Comparison

Mathematical diagram

Capacity vs. Volume

Capacity tells us how much a container can hold when it's full.

Volume tells us how much liquid is actually in the container right now.

Mathematical diagram
Mathematical diagram

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In the full lesson

  • The complete explanation
  • Worked examples
  • Common mistakes and how to avoid them
  • Test questions: 48
  • AI tutor that answers questions about the topic
  • Progress tracking for students, parents and teachers