Changes Around Us (XSEED-based)

It said to be fast or slow based on how long it takes to happen.

• change

• seasons

• days

• weather

Which among the choices is an example of a slow changes?

• rusting of iron nails

• burning of paper

• running vehicle

• rotating electric fan

Which among the choice is an example of a fast changes?

• glowing of bulb

• growing hair

• blooming of flower

• ripening of fruits

Some changes repeat after a regular interval of time such as the movement of clock's hands. They are called _________.

• periodic

• non-periodic

• changing

• non-changing

Which among the choices is an example of a periodic changes?

• occurrence of seasons

• sneezing

• snow fall

• rainfall

Which among the choices is an example of non-perodic changes?

• Floods

• rotation of the Erath on its axis

• sunrise

• changing phases of the moon

What does the picture illustrate?

• respiration

• circulation

• excretion

• diaphragm

Oxygen is not necessary for burning.

• TRUE

• FALSE

Rusting is another change which occurs only in the presence of oxygen.

• TRUE

• FALSE

What does the picture illustrate?

• cellular respiration

• burning

• rusting of bread

• fermentation