Improvement in Food Resources — Science STD 9 — Question

Name the health problems subsequent to a disaster.

Give four important functions of epithelial tissue. Name one specific place in the body where each function is carried out.

Explain why particles of a colloidal solution do not settle down when left undisturbed, while in the case of a suspension they do.

Non metals are usually poor conductors of heat and electricity. They are non-lustrous, non-sonorous, non-malleable and are coloured.

1. Name a lustrous non-metal.
2. Name a non-metal which exists as a liquid at room temperature.
3. The allotropic form of a non-metal is a good conductor of electricity. Name the allotrope.
4. Name a non-metal which is known to form the largest number of compounds.
5. Name a non-metal other than carbon which shows allotropy.
6. Name a non-metal which is required for combustion.

What will happen if:

1. Ligament gets over stretched?
2. Heparin is absent in blood.
3. Striated muscles contract rapidly for longer duration.

Why is air called breath of life? Enumerate functions of air in atmosphere.

Explain the term ‘amplitude’ of a wave. Draw the diagram of a wave and mark its amplitude on it.

Briefly describe three aspects of nutrient cycles.

What are the immunisation programmes available at the nearest health centre in your locality? Which of these diseases are the major health problems in your area?