Pick the change that can be reversed from the following.

Salt can be separated from its solution (salt dissolved in water) because

Iran rim is made slightly smaller than the wooden wheel. The rim is usually heated before fixing into the wooden wheel because on heating the iron rim

Which is a way to make a change happen?

Rusting of iron is an example of

Growth of a plant is ___________change.

Day and night occur due to ______________of the earth.

Formation of rust on iron nail is a____________ change.

Burning of paper is a ________change.

Change in weather takes place due to____________ of the sun.

A balloon increases in size when filled with air.

Rubber ball can change the shape if squeezed.

When ice melts to form water, then a change occurs in its state.

Bursting of crackers are reversible change.

The boiling of rice is a physical change.

Look at the figures given below, which show three situations (a) burning candle (b) an extinguished candle (c) melting wax.

Which of these shows a reversible change and why?

Write the changes which cannot be reversed.

Write the changes that can be noticed in our body easily.

When the ice melts? Is it reversible?

Give examples to explain the difference between changes that can or cannot be reversed.

Melting of wax can be reversed whereas burning of wax cannot be reversed. Explain.

A potter working on his wheel-shaped a lump of clay into a pot. He then baked the pot in an oven. Do these two acts lead to the same kind of changes or different? Give your opinion and justify your

What is charring of sugar? State whether it is a physical change or chemical change.

Name the cause of change which takes place during the
(a) conversion of ice into water.
(b) conversion of water into hydrogen and oxygen.
(c) formation of image of a person on a photographic film.
(d) bending of iron rods to make an iron grille.

Change of a bud into a flower is a change which cannot be reversed. Give four more such examples.

Give one example in each case.
(a) Change which occurs on heating but can be reversed.
(b) Change which occurs on heating but cannot be reversed.
(c) Change which occurs on cooling but can be reversed.
(d) Change which occurs on mixing two substances but can be reversed.
(e) Change which occurs on mixing two substances but cannot be reversed.

When a candle burns, both physical and chemical changes occur. Explain.