MEDIUM
7th CBSE
IMPORTANT
Earn 100

Define: Alloy

Important Questions on Changes of Matter

MEDIUM
7th CBSE
IMPORTANT
New Science Spark Book 7>Chapter 7 - Changes of Matter>Put on your THINKING CAP!>Q 8
What are the two types of changes in matter? Explain with examples.
HARD
7th CBSE
IMPORTANT
New Science Spark Book 7>Chapter 7 - Changes of Matter>Put on your THINKING CAP!>Q 8
What is rusting of iron? Name two factors which cause rusting and suggest two ways to prevent it.
MEDIUM
7th CBSE
IMPORTANT
New Science Spark Book 7>Chapter 7 - Changes of Matter>Put on your THINKING CAP!>Q 8
List some examples of chemical changes.
HARD
7th CBSE
IMPORTANT
New Science Spark Book 7>Chapter 7 - Changes of Matter>Put on your THINKING CAP!>Q 8
Write an activity to show a chemical change.
MEDIUM
7th CBSE
IMPORTANT
New Science Spark Book 7>Chapter 7 - Changes of Matter>Put on your THINKING CAP!>Q 8
Differentiate between chemical and physical changes.
MEDIUM
7th CBSE
IMPORTANT
New Science Spark Book 7>Chapter 7 - Changes of Matter>Put on your THINKING CAP!>Q 9

Give reasons for the following:

Rusting is seen mostly during the rainy season.

MEDIUM
7th CBSE
IMPORTANT
New Science Spark Book 7>Chapter 7 - Changes of Matter>Put on your THINKING CAP!>Q 9

Give reason for the following:

Explosion of crackers is a chemical change.

MEDIUM
7th CBSE
IMPORTANT
New Science Spark Book 7>Chapter 7 - Changes of Matter>Put on your THINKING CAP!>Q 9

Give reason for the following:

Carbon dioxide turns lime water milky.