Give scientific reasons :
Colour- blind persons are unable to distinguish between different colours .

Give scientific reasons : Water is life.

Give scientific reasons: Milk is a colloid.

Give scientific reasons: Air is a mixture

Give scientific reasons: Water is a compound

Select the appropriate option and complete the following paragraph. (cornea, faint, conical, rod, image, coloured, retina, colours, myopic, presbyopic, colour blind) The ____ in our eyes consists of many light sensitive cells. These cells are shaped like a rod and like a cone. The ____ shaped cells give information about the intensity of light to the brain. The ____ cells give information about the colour of the object to the brain. Brain processes all the information received and we see the actual image of the object. Rod shaped cells respond to ___ light also but conical cells do not. Thus we perceive ____ only in bright light. Some people cannot recognize few colours or cannot distinguish between different colours. These persons are said to be _____. Apart from not being able to distinguish between different colours, their eye sight is normal.

Give scientific reasons: Hydrogen is an element.

Give scientific reasons: Ionic compounds are called electrolytes

Give scientific reasons: Wood and glass are good insulators.

Give scientific reasons: Man is responsible for famines.