STD VII - Science (III)

A change in which a substance undergoes changes in its physical properties is called _____

When carbon dioxide is passed through lime water, then lime water becomes

Brown colour of the apple after cutting is a

Ozone layer protects us from harmful

When liquid is cooled down, it changes to solid. This process is known as

One or more new substances are formed due to

A sheet of paper was torn into pieces and then burnt.What changes does this sheet of paper undergo?

Salt is obtained by the ___________ of sea water.

All chemical changes are permanent and ________

When magnesium ribbon is burnt in oxygen, the product obtained is