Arock from the moon contains 12.5 percent of the potassium-40 it began with. how old is the rock

1.25 billion years ago,2.5 billion years ago, 3.75 years ago,and 5 billion years ago.

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.

All the elements are arranged by melting points on the periodic table. in row they go from metals to gasses. in the row from sodium to argon, sodium is more reactive than the one on its right, magnesium.