Grade 5 Chapter 24: Substances, Objects and Energy

Topics covered: Substances and objects, States of substances (solid, liquid, gas), Changes in state, Energy, Forms of energy, Uses of energy.

Can you tell?

1. What is a substance?
2. What is an object?
3. What is the difference between a substance and an object?

Substances and Objects

We see many things around us. They are all made of certain substances. For example, a chair is an object made of wood. Wood is the substance. A glass is an object made of glass. Glass is the substance. A shirt is an object made of cotton. Cotton is the substance.

An object is something that has a definite shape and can be seen or touched. A substance is the material of which an object is made. One substance can be used to make many objects. For example, wood can be used to make a chair, a table, a door, a window, etc. Also, one object can be made of different substances. For example, a chair can be made of wood, plastic, or metal.

[Note: Students should refer to the image showing various