Page 1 - Competency Based Worksheet-Some Natural Phenomena
P. 1
SAI INTERNATIONAL SCHOOL
Class 8
Competency Based Worksheet
Subject- Physics
Ch. – Some Natural Phenomena
1. Which of the following cannot be charged easily by friction?
a) A plastic scale
b) A copper rod
c) An inflated balloon
d) A woolen cloth
2. The earth’s plate responsible for causing earthquakes is:
a) The crust of the Earth
b) The mantle of the Earth
c) The inner core of the Earth
d) The outer core of the Earth
3. An electroscope is a device used to detect if an object is:
a) Charged
b) Magnetic
c) Free of cracks
d) Hot
4. During dry weather, while combing hair, hair sometimes flies apart. The force
responsible is:
a) Force of gravity
b) Electrostatic force
c) Force of friction
d) Magnetic force
PICTURE-BASED QUESTIONS
5. An electroscope's aluminum strips are replaced with plastic.
A charged object is brought in contact with the metal clip.
What will happen? Explain.
6. a) Which method of charging the electroscope is
shown in the picture?
b) What happens to the leaves when the charged rod
is removed?
