What kind of change is shown by tearing of paper?

State whether the following statements are true or false:

(a) When a candle burns, both physical and chemical changes take place.

(b) Anaerobic bacteria digest animal waste and produce biogas.

(c) Ships suffer a lot of damage though they are painted.

(d) Stretching of rubber band is not a physical change.

Melting of wax is a change where a solid changes to liquid state. Give one more such change which you observe in your surroundings.

Match the items of Column I with the items of Column II :

Fill in the blanks in the following statements using the words given in the box.

rusted, colourful, substance, chemical, physical,

reversible, iron oxide, object

(a) Making sugar solution is a ____________ change.

(b) A physical change is generally____________.

(c) Grinding of wheat grain changes its size. It is a ____________ change.

(d) Iron benches kept in lawns and gardens get____________. It is a _________ change because a new _________ is formed.