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Physical Quantities and Measurement

ICSE · Class 8 · Physics

Quick revision notes for Physical Quantities and Measurement — ICSE Class 8 Physics. Key concepts, formulas, and definitions for last-minute revision.

45 questions30 flashcards5 concepts

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An illustration comparing three scenarios: an object floating, sinking, and remaining fully submerged (just floating) in a liquid, based on the relative densities of the object and the liquid.
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Key Topics to Revise

1

Density and Its Units

  • Density is mass per unit volume.
  • Density is represented by the symbol d.
  • Density does not change with change in shape or size of a substance.
2

Measurement of Density of Solids and Liquids

  • Mass of a regular solid is measured using a beam balance.
  • Volume of a cube = (one side)³.
  • Volume of a cuboid = length × breadth × height.
3

Relative Density

  • Relative density is the ratio of the density of a substance to the density of water.
  • Relative density is represented by R.D.
  • Relative density has no unit and no dimension.
4

Floatation, Buoyant Force, and Applications

  • A body in a liquid experiences an upward force called buoyant force or upthrust.
  • Buoyant force equals the weight of the liquid displaced by the immersed part of the body.
  • Buoyant force depends on the volume of the body immersed and the density of the liquid.

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Full Notes

Key Concepts

Density is the mass per unitRelative density is the ratioThe mass of a regular solidThe volume of an irregular solidThe mass of a liquid

Frequently Asked Questions

What are the important topics in Physical Quantities and Measurement for ICSE Class 8 Physics?
Key topics in Physical Quantities and Measurement include Physical Quantities and Measurement - Concept Map, Chapter Overview: Physical Quantities and Measurement, Density Concept Map - Main Topics and Subtopics. These are the concepts ICSE Class 8 examiners draw on most — study them first, then practise related questions.
How to score full marks in Physical Quantities and Measurement — ICSE Class 8 Physics?
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.

More resources for Physical Quantities and Measurement

All 8 chapters — ICSE Class 8 Physics Revision Notes

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