What is an internal fertilisation ?
Solution : Fertilisation which takes place inside the female body is called internal fertilisation. Internal fertilisationoccurs in many animals including humans, cows, dogs and hens.
ICSE
What is fertilisation ?
Solution : fusion of the female gamete (egg ) and the male gamete ( sperm ) is called fertilisation,
TURNING EFFECT
When force is applied on a pivoted body, it can turn it and turning of body about point of rotation is called TURNING EFFECT.
FORCE
It is the cause which changes the state of a body or it changes the size or shape of the body.
VAPORIZATION
Change of liquid to vapour state on heating at constant temperature. It is fast process and produce hotness.
EVAPORATION
Surface phenomenon i.e. only takes place in surface “Is change of liquid into vapour”. Evaporation has cooling effect. Takes place at all temperatures.
FUSION or MELTING
Change of a solid to liquid state at a fixed temperature on absorbing heat.
FUSION or FREEZING
Change liquid into solid state on cooling at a fixed temperature.
MELITING
Change of solid in liquid at fixed temperature on heating.
DEPOSITION
The change of vapour directly into solid on cooling.