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Revision Notes

How Things Work

CBSE · Class 4 · EVS

Quick revision notes for How Things Work — CBSE Class 4 EVS. Key concepts, formulas, and definitions for last-minute revision.

45 questions20 flashcards4 concepts

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Key Topics to Revise

1

Spinning Objects

  • Not all objects can spin properly - some spin well while others don't
  • Objects that are the same from all sides (like coins and bangles) spin better
  • The position of the hole or center point affects how well an object spins
2

Floating and Sinking

  • Objects can either float on water or sink in water
  • Floating and sinking doesn't depend only on weight - light objects can sink and heavy objects can float
  • Shape plays an important role in floating and sinking
3

Making and Testing Objects

  • Paper boats can be made from newspapers and tested in water
  • Different boat designs have different strengths and weaknesses
  • Some boats tip over easily while others maintain better balance

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Full Notes

Key Concepts

Not all objects can spin effectivelyWhether an object floats or sinksThe same material can floatDifferent materials behave differently in water

Frequently Asked Questions

What are the important topics in How Things Work for CBSE Class 4 EVS?
How Things Work covers several key topics that are frequently asked in CBSE Class 4 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in How Things Work — CBSE Class 4 EVS?
Understand the core concepts first, then work through the 45 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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All 10 chapters — CBSE Class 4 EVS Revision Notes

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