MATTER IN OUR SURROUNDINGS

MATTER IN OUR SURROUNDINGS

Transition daily test paper date:28-06-2010 class:ix

1.State whether True or False.

(i) Water has no definite shape; therefore, it is not matter.

(ii) Gases expand to fill the space available.

Question 2 ( 1.0 marks)

A substance has a definite volume, but no definite shape. State whether this substance is solid, liquid or gas.

Question 3 ( 1.0 marks)

Which physical state of matter is the densest?

Question 4 ( 2.0 marks)

What are the different factors affecting evaporation?

Question 5 ( 2.0 marks)

The following figure shows a block of ice. Give two reasons as to why this block is considered as matter.

Question 6 ( 2.0 marks)

Why does matter change state?

Question 7 ( 2.0 marks)

It is observed that water boils at lower temperature at higher altitudes. Why?

Question 8 ( 2.0 marks)

If some alcohol is rubbed on the hand, the rubbed portion of the hand feels cool. Why?

Question 9 ( 3.0 marks)

A large crystal of potassium permanganate is kept in a glass beaker containing water. This setup is then left undisturbed for an hour. The solution undergoes a change in colour.

(i) What is this change in colour?

(ii) Why does such a change take place?