Class 7 science NCERT Book hello this is Chodenla Bhutia, I am currently a student of lovely professional university pursuing my bachelors in education.

1. CHODENLA BHUTIA
CLASS 7 SCIENCE
Integrated B.Sc. –B.Ed. (Non Medical)
Lovely Professional University
School of education

2.  Define the concept of light.
 Explain how we are unable to see objects in the
dark.
 Identify different types of objects based on their
interaction with light.
 Enlist different examples of transparent,
translucent and opaque objects.
 Justify the importance of light in our lives.
 Appreciate the role of light in easing the lives of
humans for our everyday tasks and activities

4.  Can you see what was there in the room?
Whose portrait was hung on the wall?Was
there anyone present? Can you see the
pianoin the centee?

5.  In this world, we usually see a variety of
objects. Sometimes, we are unable to see
anything in a dark room but on lighting up the
room, we are able to see the things in the
room. Since, it is an obvious question arising
that what makes thing visible.
 Light is a form of energy which enables us to
see objects from where it comes or reflected.
We can detect light with our eyes.

6.  https://www.youtube.com/watch?v=Xf_VZ8G
xU1Y

7. Q. what would happen if there is no light?
QUESTIONS:

9.  Transparent objects allow light to pass through
them completely.
E.g: glass
 Translucent objects allow light to pass through
them partially.
E.g: Butter paper
 Opaque objects do not allow any light to pass
through them.
E.g: table, book, etc
OBJECTS ONTHE BASISOFTHEIR INTERACTIONWITH LIGHT:

10. Q. what type of an object is our hand?
 Transparent
 Translucent
 Opaque
 None
QUESTIONS:

12. The path of light gets blocked when an object
covers the source of light. This is illustrated by
trying to see the flame of a candle using a
straight pipe and then with a bent pipe. This
proves that light travels in a straight line.

13. Q. Light travels along in every other path other
than the straight path.
 TRUE
 FALSE
QUESTIONS:

14.  Light travels along straight lines.
 Transparent objects
 Translucent objects
 Opaque objects

15. QUESTIONS:
Q. Give me five examples of transparent, translucent and
opaque objects.
Q. Give reasons why light moves along a straight path.
Play with a mirror
 Write your name with a sketch pen on a thin sheet of
paper, polythene or glass. Read your name on the sheet
while standing in front of a plane mirror. Now look at
your image in the mirror. Record your observations and
share it in the next class.

16.  https://www.youtube.com/watch?v=Xf_VZ8G
xU1Y
 https://byjus.com/cbse-notes/cbse-class-7-
science-notes-chapter-15-light/
 https://www.learncbse.in/light-class-7-extra-
questions/
 Bhandrapada , January 2019, NCERT science
class 7
CBSE-Class-7-NCERT-Science-Book-Light-
chapter-15 (3).pdf