MEDIUM
6th CBSE
IMPORTANT
Earn 100

Why is the germination of a seed a chemical change?

Important Questions on Changes Around Us

HARD
6th CBSE
IMPORTANT
New Science Ahead>Chapter 7 - Changes Around Us>Exercises>Q 1
State four characteristics each of physical and chemical changes. 
HARD
6th CBSE
IMPORTANT
New Science Ahead>Chapter 7 - Changes Around Us>Exercises>Q 2
Write a short note on chemical reactions.
MEDIUM
6th CBSE
IMPORTANT
New Science Ahead>Chapter 7 - Changes Around Us>Exercises>Q 3
The powdering of sugar is a physical change. Justify the statement.
MEDIUM
6th CBSE
IMPORTANT
New Science Ahead>Chapter 7 - Changes Around Us>Exercises>Q 4
Only chemical changes are irreversible. Do you agree? Give reasons and examples.
MEDIUM
6th CBSE
IMPORTANT
New Science Ahead>Chapter 7 - Changes Around Us>Exercises>Q 5
Write a note on fast and slow changes. 
MEDIUM
6th CBSE
IMPORTANT
New Science Ahead>Chapter 7 - Changes Around Us>Higher-Order Thinking Skills>Q 1
Why are iron gates painted?
MEDIUM
6th CBSE
IMPORTANT
New Science Ahead>Chapter 7 - Changes Around Us>Higher-Order Thinking Skills>Q 2

The breaking of a glass bottle and the burning of a matchstick are both irreversible changes. We cannot get back the original object in both cases. What then is the difference between the two? 

HARD
6th CBSE
IMPORTANT
New Science Ahead>Chapter 7 - Changes Around Us>Activities for Assessment>Research project
The heating of air by sunlight is an important cause of weather changes. Find out more about this and write a report.