MEDIUM
6th CBSE
IMPORTANT
Earn 100

What are the three states of water?

Important Questions on Changes Around Us

HARD
6th CBSE
IMPORTANT
Sciwise - A coursebook of Science>Chapter 6 - Changes Around Us>EXERCISE>Q 1
Justify the statement, 'physical changes can be both reversible and irreversible'.
MEDIUM
6th CBSE
IMPORTANT
Sciwise - A coursebook of Science>Chapter 6 - Changes Around Us>EXERCISE>Q 2

The change given below is a chemical change or not? Explain why.

A pencil reduces in size on sharpening.

MEDIUM
6th CBSE
IMPORTANT
Sciwise - A coursebook of Science>Chapter 6 - Changes Around Us>EXERCISE>Q 2

The change given below is a chemical change or not? Explain why.

Melting of wax on heating.

MEDIUM
6th CBSE
IMPORTANT
Sciwise - A coursebook of Science>Chapter 6 - Changes Around Us>EXERCISE>Q 2

The change given below is a chemical change or not? Explain why.

Burning of wood.

HARD
6th CBSE
IMPORTANT
Sciwise - A coursebook of Science>Chapter 6 - Changes Around Us>EXERCISE>Q 3
How is a physical change different from a chemical change?
MEDIUM
6th CBSE
IMPORTANT
Sciwise - A coursebook of Science>Chapter 6 - Changes Around Us>EXERCISE>Q 5
How do heat and cold affect the overhead electric wires in summer and winter times?
HARD
6th CBSE
IMPORTANT
Sciwise - A coursebook of Science>Chapter 6 - Changes Around Us>EXERCISE>Q 6
Why do we use mercury in a thermometer?
HARD
6th CBSE
IMPORTANT
Sciwise - A coursebook of Science>Chapter 6 - Changes Around Us>EXERCISE>Q 1
Why burning of candle considered to be both a chemical and a physical change?