Teaching Material Class 6 Physics Expanding Ice

Subject: Physics
Topic: - Expanding Ice Class: Grade 6
Sub – Topic: Different states of Substances Duration: 15 Mins

Aim: - Amazing Expanding Ice
Overview
Children experiment with freezing water to observe another special property of ice: that it
is less dense as a solid (ice) than it is as a liquid (water). Amazing, Expanding Ice! is an
"overnight" activity requiring 20 minutes of preparation, overnight freezing of the
experiment, and 10 minutes of follow-up discussion.

What's the Point?

 Substances exist in different states; i.e. solid, liquid, gas
 Ice is a unique substance because it’s solid state — ice — is less dense than its liquid
state.
 Physical properties are characteristics of a substance. They do not change. Physical
properties include color, smell, freezing/melting point, and density.
 Density is a measure of the mass (amount of stuff) per unit volume (amount of space)
of a substance.

Materials
For the group:

 Several pitchers of water
 Access to a freezer
 Trays to carry cups of water
 Paper towels in case of spills
 Access to a kitchen scale or postal scale (optional)

Foil to cover the cups

 Marker to write on cups
 Ruler

Preparation

 Fill the pitchers with water to a level that the children will be able to pour into the cups.
Each child will need enough water to fill both cups.