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Revision Notes

How Things Work — Revision Notes

CBSE · Class 4 · EVS

How Things Work revision notes for CBSE Class 4 EVS: 4 topics in quick points. Part of the CBSE Class 4 EVS syllabus.

44 questions64 flashcards5 concepts

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Key Topics to Revise

1

Spinning Things

  • Some objects like coins and bangles spin, while erasers do not spin properly.
  • The first spinner with a hole at the centre appears the same from all sides and remains upright while spinning.
  • A square spinner appears circular while spinning.
2

Floating and Sinking

  • Floating or sinking of an object cannot be decided just by whether it is heavy or light.
  • Some heavy objects like an iron nail sink, while lighter ones like a leaf float.
  • Changing the shape of an object can make it float or sink.
3

Making and Improving Boats

  • Paper boats can be made after rain using old newspapers.
  • Different boats can float differently in water.
  • Some boats are strong, some break easily, some tip over easily, and some keep better balance.
4

Observing and Thinking

  • Ravi notices that a spinner slows down and eventually stops.
  • Questions help in learning about how things work.
  • The first spinner stays upright, but the second spinner does not behave the same way.

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Full Notes

Key Concepts

Some objects like coins and banglesA spinner with a hole atA charkha has a large wheelSpinning tops have been usedFloating or sinking cannot be decided

Frequently Asked Questions

What are the important topics in How Things Work for CBSE Class 4 EVS?
Key topics in How Things Work include Spinning Things, Floating and Sinking, Making and Improving Boats, Observing and Thinking. Study these first, then practise questions on each for Class 4 exams.
How should I revise How Things Work for Class 4 exams?
Learn the core ideas first, then work through the 44 practice questions on How Things Work. Revise 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 CBSE Class 4 EVS Revision Notes

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