Page 129 - Math Skill - 5

Measurement 127

D. Assertion-Reason Based Questions
Directions for Questions 1 to 3: In each of the questions given below, there are two statements
marked as Assertion (A) and Reason (R). Mark your answer as per the codes provided below:
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.

(c) A is true but R is false.
(d) A is false but R is true.
Q. 1. Assertion (A) : Subtract 47 m 76 cm from 70 m and get the result 22 m 24 cm.
Reason (R) : Before doing the subtraction, we have to convert all questions in single unit.

Q. 2. Assertion (A) : 2 dm = 200 mm.
Reason (R) : To convert from higher to lower units, we do multiply.

Q. 3. Assertion (A) : Mass, length and time are fundamental physical quantities.
Reason (R) : They are independent of each other.

Word Stock

Conversion Measurement Vice-versa Mass Length Capacity Weight
Operation Column Row Mile Gallon Pour Quantity

Activity

Objective : Relating metric measures to day-to-day activities of life.
Materials Required : A measuring tape for measuring length, a weighing machine to measure
weight (or mass), a packet of fruit drink of 200 mL per student in the class.

Procedure : 1. Divide the class into groups of 5.
2. One among the 5 students of a group to be made the leader of the team.
3. Each student in the group will take a long jump and its reading will
be noted.
4. Next the weight of each student will be taken and recorded.

5. Give each student of a group one packet of fruit drink and record the total
fruit juice drunk by a group.

6. Arrange the lengths and weights measured in ascending order for each
group.
Observation : By comparing the observations with other groups in the class. Answer the
following.
1. Name the tallest student.
2. Name the shortest student.
3. Name the student of the lowest weight.

4. Name the student of the highest weight.