Substance


 
 
Concept Explanation
 

Substance

Introduction:

There are large numbers of things around us which we see and feel. For example, book, glass, pens etc. The space occupied by the book is called its volume. If we pick up the book, it has some mass. Examples of matter include wood, cloth, paper etc. Matter offers resistance by the fact that we cannot displace an object from one place to another without applying force. Thus matter can be defined as “anything that occupies space, has mass and offers resistance is called matter.” Atom is the smallest unit of an element. Everything in this universe is made up of matter. Matter is made up of extremely small particles called atoms. For example, smallest piece of copper, gold or silver or any other element is called atom. An atom cannot be broken down into simpler substances by any physical or chemical methods.

Substance: is a kind of matter that cannot be separated into other kinds of matter by any physical process. For example, sugar dissolved in water can be separated from water by evaporating the water. Here, sugar is a substance which cannot be broken into its components by any physical process. Similarly, sodium chloride, lime (calcium oxide) are all substances

Sample Questions
(More Questions for each concept available in Login)
Question : 1

Identify the option which explains the fact that "We cannot displace a book from one place to another without applying force because __________"

Right Option : A
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Question : 2

Which of the following is the property of matter ?

Right Option : C
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Question : 3

Which of the following are correct :

(a)  Anything that occupies space and has mass is called matter.

(b) Matter is made up of extremely small particles called atoms.

(c) A substance which is made up of two or more elements combined chemically in fixed proportion is called compound.

Right Option : D
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