How often does earths magnetic field change direction?

about every 1 million years

about every 2 million years

about every 3 million years

about every 4 million years

The meseta in spain is a a. navigable river b. castle c. coastal plain d.plateau

Impact of over population and under population?

Surreset the population of snails in the farm = xvumber of marked snails number of snails which are captured and markeember of recaptured snails population of snails in the vegetable farm5 - 24124let's disehow would you fthe value of x if ynot change 5 insimplest form? 9x 24*= 6 x 2= 144er estimates that there are 144 snails in the