The time required for one-half of the atoms from a sample of a radioactive substance to decay is called its
a. half-life
b. beta decay
c. alpha decay
d. isotope number

The half life, this is how long it takes for half of the atoms to decay

If the water vapor content stays the same and the temperature drops, then the relative humidity increases. its vise versa.if the water vapor content stats the same and the temperature rises, the relative humidity decreases. so, yes, i'd say that temperature and humidity have a strong relationship.