Skip to content
PlayOwl

Science · Grade 2

Reversible and Irreversible Changes

Heating and cooling change materials: ice melts, chocolate softens, eggs cook and paper burns. Learners sort these changes into ones that can be reversed (changed back) and ones that cannot, and practise building an argument with evidence: a claim, the observations that support it, and why those observations matter.

  • 3 lessons
  • About 70 minutes
  • Reversible changes check: 8 questions
  • Ways to answer: fill in the blanks, choose an answer, highlight a text, match pairs, put in order and sort into groups
Try it now (no account) One of the five free starter courses Open in PlayOwl

What learners will discover

  • Describe changes to materials caused by heating or cooling, such as melting, freezing, cooking and burning.
  • Classify changes caused by heating or cooling as reversible or irreversible.
  • Make an argument with a claim and evidence that a change can or cannot be reversed.

Lessons

  1. Heating and cooling change things 4 steps2 practiceabout 22 min
  2. Can it change back? 5 steps3 practiceabout 22 min
  3. Argue with evidence 6 steps2 practiceabout 26 min
  4. Reversible changes check 8 questions at the end

Keep exploring

Games to practice with

  • Marble MountainLay straights, curves, drops and splitters to roll marbles down the mountain.
  • Habitat Builder 3DFind the right home for frogs, camels, polar bears and more.
  • Weather LabPredict the weather in a box, then run a fair test to find out why.

More 2nd grade science

Guide for grown-ups