Solve this please. Note: End X is on left side, and End Y is on the right side.

Figure 5.1 shows the arrangement of atoms in a solid block.

a. (i) End X of the block is heated. Energy is conducted to the end Y, which becomes warm. [2]

(ii) Explain why the solid block expands when it is heated. [1]

b. The block is heated and becomes a liquid.

Describe the changes that occur to the arrangement and the motion of the atoms. [2]

I'm really sorry that you can't see the questions properly on the picture.