What do these two changes have in common?
carving a piece of wood
building a tower out of magnetic blocks

What is the answer for the complicated molecules that make up living things usually contain carbon. why is carbon so important in these molecules?

Other than earth, is also known to have magnetic pole reversal? a: venus b: mars c: earths moon d: the sun

Temperatures in ponds and lakes vary by season. select the best answer from the choices provided t f