Page 18 - Science Class 6 Times Publication

d. Which of the following is a derived quantity?

i. Quantity of matter ii. Speed
iii. Temperature iv. Time

e. How many days are there in a leap year?
i. 365 days ii. 365 ½ days

iii. 366 days iv. 365.25 days

2. Answer these questions in very short:
a. What is measurement ?

b. What do you mean by physical quantities? Give examples.
c. What is the SI unit of temperature ?

d. How many seconds are there in a day ?
e. What is the CGS unit of length ?

3. Dene the following terms:
a. CGS system b. FPS system c. MKS system

d. SI system e. SI units f. Derived units

4. Give reasons:
a. The unit of area is a derived unit.

b. The unit of length is fundamental unit.
c. Hand span and footsteps are not reliable units.

5. Convert the following:
a. 5kg into grams.

b. 1day into minutes.
c. One year into hours.

d. 50 cm into kilometre.
e. 1000 metres into centimetres.

(Answers: a. 5000 g b. 1440 min. c. 8760 hrs. d. 0.0005 km. e. 1,00,000 cm)

Times' Crucial Science and Environment 14 Book 6