Lesson eLearning

Which of the following experiments can help students observe surface tension of water?

easy MCQ 1 mark Class 5 · EVS · Experiments with Water
  1. a) Dropping a pin from a height
  2. b) Placing a paperclip on the water surface
  3. c) Heating water until it boils
  4. d) Submerging a wooden block fully
Answer
b) Placing a paperclip on the water surface

The correct answer is b) Placing a paperclip on the water surface — Exclude options that do not involve surface tension (e.g., dropping a pin, heating water).

Step-by-step solution

  1. Identify the property to be observed – surface tension.
  2. Consider options that involve placing objects on the water surface.
  3. Recognise that a paperclip can stay on the surface due to surface tension.
  4. Exclude options that do not involve surface tension (e.g., dropping a pin, heating water).
Common mistake: Thinking that dropping a pin from a height demonstrates surface tension

Concept tested: Observing surface tension of water

Published · How this solution was prepared and checked

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