Some Natural Phenomena — Science STD 8 — Question

Where is iron present in our body?

In the following statements, the underlined words are jumbled up. Write them in their correct form. Carbon dioxide, thaneme, nitrous oxide and water vapour are known as heengrouse sesga.

Why is a layer of zinc coated over iron?

Name the form of polyester which is replacing materials like glass and used for making bottles and jars.

Name different varieties of coal.

Name the petroleum product used to drive heavy vehicles.

Name two metals which are purified by using the chemical effect of current (or electrolysis).

Name one factor on which the height of a person depends.

State whether the following statements are True or False. If false, correct the statement:
External fertilisation can occur both in water and on land.