1. Objective Questions 

1A. Write true or false for each statement 

(a) S.I. unit of temperature is Fahrenheit.

Answer. False 

(b) Every measurement involves two things – a number and a unit

Answer. True 

(c) Mass is the measure of quantity of matter.

Answer. True 

(d) The S.I. unit of time is hour.

Answer. False 

(e) The area can be expressed as the product of length of two sides.

Answer. True 

1B. State if the following statements are true or false. Correct the statement if it is false. 

1. In ancient times, a cubit was used to measure the mass of an object.

Answer. False. In ancient times, a cubit was used to measure the length of an object. 

2. There are seven base units in the SI system.

Answer. True 

3. Second is considered as the fundamental unit of time in both CGS and MKS systems.

Answer. True 

4. ‘Centi’ means ‘a hundredth part’.

Answer. True 

5. The symbol used for a unit is always written in capital letters.

Answer. False. The symbol used for a unit is normally written in small letters.

2. Fill in the blanks 

(a) The S.I. unit of length is metre of time is second of mass is kilogram.

(b) °C is the unit of temperature.

(c) 1 metric tonne = 1000 kg

(d) The zero mark in Celsius thermometer is the melting point of ice

(e) The thermometer used to measure the human body temperature is called the clinical thermometer.

(f) The normal temperature of human body is 37 °C or 98.6 °F.

(g) The mass of an object is measured with the help of a beam balance. 

3. Select the correct alternative 

(a) The symbol of degree Celsius is 

1. °C
2. °F
3. K
4. °K 

(b) 10 mm is equal to 

1. 1 cm
2. 1 m
3. 10 dm
4. 10 cm 

(c) The amount of surface occupied by an object is called its: 

1. Volume
2. area
3. Mass
4. length 

(d) A metre ruler is graduated in: 

1. m
2. cm
3. mm
4. Km 

(e) A thermometer is graduated in: 

1. Kelvin
2. °C
3. G
4. cm