Question

using paper strips or thread.
units of measure.
Procedure:
tep 1. The class should be divided into groups of 5 students each.
tep 2. Student in each group wraps the newspaper strip around the head of
the one of the other four students in the group and puts a mark at the
correct length.
ep 3. Now, the student opens the paper strip and measures the marked
length with the help of paper clips/crayons which we take as the unit of
measure.
p 4. The process is repeated for the waist and wrist of that student and the
data obtained is recorded in the table given below:
1 paper clip = 1 unit
UI Children in a group
Materials required: Long strips of newspaper/thread roll, paper clips/crayons as​

Answer 1

Step-by-step explanation:

It is used in submarines to determine the distance of a torpedo and helps in deciding the right time for the attack.

It is used in a nuclear reactor to observe the chemical reactions that are taking place.

In military periscopes are used to observe from their hiding position.