Changes Around Us - Class 6 Science Workbook

Which of the following is an example of an irreversible change?

When a candle burns, both physical and chemical changes occur. The melting of wax is a physical change, while the burning of the wick is a __________ change.

Which of these changes can usually be reversed?

Give one example of a change where a substance changes its state but its chemical nature remains the same.

The change of milk into curd is an example of an ____________ change.

Which of the following actions brings about a change only temporarily?

Differentiate between a physical change and a chemical change with one key point.

When you dissolve sugar in water, it is an example of a __________ change.

Which of the following involves a change in shape but not in composition?

Why is the rusting of iron considered an irreversible chemical change?