Page 17 - Science Class 6 Times Publication

Main Points to Remember

1. The comparison of unknown physical quantity with a known
or standard quantity is called measurement.

2. The quantities which can be measured are called physical
quantities.

3. The system of measurement in which length is measured in
metre, mass is measured in kilogram and time is measured in
second is called MKS system.
4. The system of measurement in which length is measured in
centimetre, mass is measured in gram and time is measured
in second is called CGS system.
5. The units which cannot be split into other simpler units are
called fundamental units.
6. The units which can be expressed in terms of two or more

fundamental units are called derived units.

Exercise

1. Choose the best alternative in each case.

a. Mano, Pathi and Dalo are the traditional Nepalese instruments
to measure
i. Area ii. Mass of grains

iii. Volume of grains iv. Length

b. Which of the following is a physical quantity?
i. Temperature ii. Anger
iii. Hatred iv. Affection

c. Which of the following is a traditional tool to measure length in
Nepal?

i. Footstep ii. Arm
iii. Hand span iv. All of these

Times' Crucial Science and Environment 13 Book 6