Correct or not?

Is it true that we use zero conditional to express the following:

1. a scientific fact

e.g. If we boil water, it changes into steam

2. something that is generally true

e.g. Babies cry if they are hungry

3. a personal habit

e.g If I need help with a school project I look online. This is my habit.

4. something that is true for a certain person

e.g If I drink coffee, I stay up late.

If I eat peanuts, I am sick.