Rainbow is produced when sunlight falls on drops of rain.

which of the following physical phenomenon is/are responsible for this?

• Diffusion

• dispersion and total internal reflection

• only reflection

• diffusion reflection and total internal reflection

The burning of fire needs

• oxygen

• carbon dioxide

• nitrogen

• water waper

Which of the following is not true regarding the properties of air

• air occupies space

• air exerts pressure

• air has no mass

• air cannot be seen

which of the following does not disturb the balance of gases in the air?

• cutting down tree and forest

• releasing pulluting gases into the air

• growing trees

• releasing smoke from the vechical

which of the following changes weather

• sun

• moon

• man

• air

land breeze blows

• during the day time

• at noon

• during the night time

• during morning

sea breeze blow during

• at day time

• at night time

• at noon

• evening

Evaporation increases with

• an increase in the amount of water

• a decrease in the temperature.

• a decrease in the area of exposure

• an increase in the area of exposure.

The process by which water vapour changes into water is called

• filteration

• condensation

• sedimentation

• decantation

frozen dew is called

• frost

• rain

• hail stone

• water