# NCERT Science Class 6 Chapter 10 Summary/revision notes

## NCERT Science Class 6 Chapter 10 Motion and Measurement of Distances Summary/revision notes

We can measure distances in various ways like by hands, handspan, foot, etc. These measurements are not precise and vary from person to person. So we use aÂ  standard convention which is accepted by everyone. It the Internation system of the unit (SI).

As per SI

1 meter equals to 100 centimeter or 1000 milimeter.

For larger distance we use kilometre.

One kilometre equals to 1000 meter.

### Motion and its type:

An object is said to be in motion if its place varies from time to time. On the basis of the movement a motion can be:

Rectilinear: Movement on a straight path.

Circular: Movement on a circular path. e.g. a moving fan.

Periodic motion: In this motion, an object repeats its place after some time. For example, movement of a swinging jhoola, pendulum, strings of guitar etc. are examples of periodic motion.

Combination of circular motion and rectilinear motion: In this type of motion object shows a circular motion as well a rectilinear motion. For example a rolling ball, a moving cycle wheel.

See also:

Exercise solution NCERT class 6 Chapter 10.

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