One Mark questions:
1. We are not able to see things behind a wall. Give reason. 
2. Give two examples of gases insoluble in water. 
3. What type of surfaces do rough materials have? 
4. What are lustrous materials? 
5. What do you mean by grouping? 
6. What do you mean by metallic lustre? 
7. What do you mean by hard materials? 
8. What do you mean by lustre?
Two Mark questions:
1. Differentiate between miscible and immiscible liquids. 
2. Why does an iron nail sink in water but a leaf does not? Give reason for it.
3. Define Grouping. Why is it essential to group things.
4. Differentiate between miscible and immiscible liquids.
5. What is classification?

 6. What are miscible and immiscible liquids. Explain with example.
7. Define Classification. Why is it essential to classify things?
8. Oxygen and Carbon-dioxide are soluble in water. What is the importance of each of these gases in nature.
Three Mark questions:
1. How will you distinguish between opaque and translucent materials? Give example.

 2. Describe an activity to show that oil is an immiscible liquid.
3. Describe an activity to show the test for solubility of following substances:
salt,sugar,sand, sawdust, glucose.