Activity

Physical change introduction

Summary
Introduce physical changes (part of chemistry curriculum) with four simple stations. Students discuss whether the physical changes are reversible or not.
Science content
Chemistry: Physical Changes, Solutions, Mixtures and Separating (2, 4, 5, 6)
Lessons activity is in
Materials
  • pieces of scrap paper
  • balloons
  • tubs of marbles and gravel, and sieves (hole spacing that catches the marbles and allows gravel to pass)
  • pencil and pencil sharpeners
Procedure

Set up four stations for students to visit:
1. Pieces of paper that they can crumple and tear
2. Balloons that they can blow up, then deflate again
3. Students mix marbles and gravel together, then try and separate again using the sieve
4. Pencils that they can sharpen.

Students can use a worksheet (attached) to record whether they think each physical change is reversible or not. This is not always obvious and will lead to some interesting discussion.

Grades taught
Gr 2
Teaching site
Weir Elementary