Available Answers

1. 1.

   Follow the sequence and fill in the table.

   STEP	INITIAL STATE	HEATING/COOLING	FINAL STATE	PROCESS
   A	ice	heating	water	melting
   B				boiling
   C		cooling
   D			ice

    

   

2. 2.

   Tick (√) the correct answer and put a cross (x) against the wrong one.

   1. Solids have a fixed shape and a fixed volume.
   2. Liquids take the shape of the container in which they are kept.
   3. Gases have a fixed volume.
   4. Ice changes to liquid water on heating.
   5. Steam changes to liquid water on cooling.
   6. Liquid water changes into ice on heating.
3. 3.

   Tick (√) the correct statement and put a cross (x) against the wrong one.

   1. The molecules of solids are held together very loosely.
   2. Liquids do not have a fixed volume.
   3. Water changes into water vapour when it is frozen.
   4. In a water-sugar solution, water is the solute.
   5. Sugar is soluble in water.
4. 4.

   Match the following and write two examples for each.

   1. SOLID	a. neither fixed shape nor fixed volume
   2. LIQUID	b. fixed shape and fixed volume
   3. GAS	c. no fixed shape but fixed volume

    

5. 5.

   What is matter?
6. 6.

   How is a solid different from a liquid?