When ice melts to form water, change occurs in its

Drying of wet clothes in air is an example of

Formation of curd from milk is

Out of the following an example of a desirable change is

Air pollution leading to Acid rain is a

Magnet attracts iron needle. This is ________change. (a reversible / an irreversible)

Boiling of egg results in_________change. (a reversible / an irreversible)

Changes that are harmful to us are_______________(desirable / undesirable)

Plants convert Carbon-di-oxide and water into starch. This is an example of _____________change. (natural / human made)

Bursting of fire crackers is a _______change whereas germination of seeds is a ______change. (slow / fast)

Growing of teeth in an infant is slow change.

Burning of match stick is a reversible change.

Change of New moon to Full moon is human made.

Digestion of food is a physical change.

In a solution of salt in water, water is the solute.

Growth of a child, Blinking of eye, Rusting, Germination of a seed

Glowing of a bulb, lighting of a Candle, breaking of a coffee mug, curdling of milk

Rotting of an egg, condensation of water vapour, trimming of hair, Ripening of fruit

Inflating a balloon, popping a balloon, fading of wall paint, burning of kerosene

What kind of a change is associated with decaying of a plants?

You are given some candle wax. Can you make a candle doll from it? What kind of change is this?

Define a slow change.

What is a solution?

What happen when paper is burnt? Explain.

Can deforestation be considered a desirable change? Explain.

What type of changes is associated with germination of a seed? Explain

Give one example for each case that happens around you.
a. Slow and fast change
b. Reversible and irreversible change
c. Physical and chemical change
d. Natural and man-made change
e. Desirable and undesirable change

When a candle is lit the following changes are observed.
a. Wax melts.
b. Candle keeps burning.
c. The size of the candle decreases.
d. The molten wax solidifies
e. Which of the changes can be reversed? Justify your answer.