Page 32 - Science Class 6 Times Publication

Chapter
Chapter

3 MACHINE

Estimated periods:4

OBJECTIVES

At the end of the lesson, the students will be able to :
Ü identify simple machines and dene them;

Ü enlist the advantages of simple machine in daily life;
Ü classify the different types of simple machines.

MIND OPENERS
Ü What do you use to chop vegetables?
Ü What do you use to cut paper ?
Ü How do you open the lid of cold drink bott le?
Ü What are such instruments called ? Why do you use such
instruments? Discuss.

Introduction

We perform several work in our daily life. During our work, we can
use different instruments and tools to make our work easier and
faster. Some of these tools are simple in structure and are called
simple machines. Thus, the simple devices which make our work easier
and faster are called simple machines. Broom, nail cutter, scissors,
crow-bar, bottle opener, etc are some examples of simple machines.

Some of the machines that we use are very complex in structure.
Such machines are called complex machines and are made up of large
number of simple machines. Motorcycle, bus, crane, sewing machine,
etc are some examples of complex machines.

Sewing machine Motorcycle Crane

Times' Crucial Science and Environment 28 Book 6