What are alkaline earth metals? Why are they called so?

Alkaline earth metals are

Why are monoxides of alkaline earth metals are very stable?

Which one of the alkaline earth metals carbonate is thermally most and last stalbe. Why?

Which one of the following properties is more applicable to alkaline earth metals compared with alkali metals ?

What are sex hormones ? Why are they named so ? State their function .

What are fossil fuels? Why are they so called?