Subject :NSO Class : Class 6
Mark the incorrect statement.
A Melting of wax is a physical change while burning of wax in a candle is a chemical change.
B Metals expand on heating while contract on cooling. Both are physical changes.
C Composition of matter changes during a chemical change while it remains same during a physical change.
D High and low tides in sea are the examples of non-periodic changes while growth of a tree is a periodic change.
Ans 1:
Class : Class 8
d
Ans 2:
Class : Class 6
yea yea its D we get it
Ans 3:
Class : Class 9
Option d is correct
Ans 4:
Class : Class 7
Option d is correct right can anyone explain the correct answer given
Ans 5:
Class : Class 8
Option D is incorrect
Ans 6:
Class : Class 6
D is the correct answer because the revolution of moon around the earth causes high tides and low tides and tree doesn't grow everyday.