Materials : Metals and Non-Metals — Science STD 8 — Question

Name the device which is attached to heavy luggage (such as a heavy suitcase) to move it easily by pulling.

Name the characteristic of sound which can distinguish between the 'notes' (musical sounds) played on a flute and a sitar (both the notes having the same pitch and loudness).

Name the disease caused by the insufficient production of insulin hormone by pancreas.

Name the bacterium which causes anthrax disease.

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

Fill in the blanks: The planet which appears reddish in colour is _________.

What are the major groups of micro-organisms?

Fill in the blanks with appropriate words. Synthetic fibres are synthesised from raw material called _________ .

What do the testes in a man produces?

Give reasons for the following. Immersion rods for heating liquids are made up of metallic substances.