That's called chills, and is a normal symptom of fevers and the flu. However, if it persists or happens daily, when you aren't ill, then see your doctor.
An Earthquake happens.
An Earthquake happens.
In blast freezing, fans passed cold air over the food
The freezing point of the solution depends on the NaCl concentration.
No, energy is removed.
catastrophism is the idea that geologic change happens soddenly
it drops
This is a change of phase from liquid to solid.
Tornados
Your mother.
Some happens gradually, and some happens suddenly
it rises