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Things That Do Not Melt

Things That Melt: Things That Do Not Melt

Things That Do Not Melt

Things That Do Not Melt

NCERT anchor: NCERT Looking Around Class 1 — Theme: Materials (comparing melting and non-melting objects)

What you will learn

  • Not everything melts like ice or chocolate.
  • A stone, a steel spoon, a wooden block, and a plastic toy stay solid even on a warm day.
  • Comparing melting and non-melting things helps us choose the right material for a job.

Key concepts

1. Everyday objects that stay solid in warmth

Verbal: Stone, wood, steel spoon, plastic toy — all stay the same shape in warm weather.

Visual: A stone and an ice cube side by side in the sun.

2. Comparing melting vs non-melting things

Verbal: Ice melts easily; a stone does not melt in everyday warmth.

3. Why this matters

A steel spoon used for hot tea does not melt, so it is safe to use.

Worked example

Leaving a stone and an ice cube in the sun

Step 1 — Place a stone and an ice cube on a plate in the sun.
Step 2 — Check after 15 minutes.
Step 3 — The ice cube has become a puddle of water.
Step 4 — The stone looks exactly the same as before.
Answer: ice melts, but the stone does not melt.

Common mistakes

MistakeWhyFix
Everything melts if left in the sun long enoughStone, wood, and steel need far more heat than the sun givesCompare a stone and an ice cube in the sun
Getting hot means meltingA metal spoon can get hot without meltingTouch a warm spoon and check it is still solid
Plastic always melts in warm weatherPlastic toys stay solid in everyday warmthLeave a plastic toy in the sun and check

Quick check

  • Name one thing that does not melt in the sun.
  • Does a wooden block melt on a warm table?
  • Why is a steel spoon safe to use in hot tea?
  • Stretch: Why do stone, wood, and steel not melt on a warm day the way ice does?

Revision tip: Compare an ice cube and a small stone on a sunny windowsill.

Open the Practice tab for graded questions on Things That Do Not Melt.

Key Takeaways (TL;DR)

  • What you will learn
  • Key concepts
  • Worked example
  • Common mistakes

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