Why is there a difference between sodium and potassium in the reactivity with water

Embryos of different species look very similar, which shows that the organisms share a ancestor.

Imagine that you’re getting ready to move to a new city. when people move, they are influenced by push factors and pull factors, and you have many reasons for your move. which of the following factors is an example of a pull factor? a. wanting to move because you’ve found a great new school somewhere new b. needing to move because there are not enough resources in your old hometown c. being forced to move because your old home is gone d. having to move because there are no jobs in your current hometown

Describe at least two advantages and two disadvantages of using hydropower as a source of energy.