Adichotomous key is a way of sorting organisms based on
a : whether they are unicellular or multicellular
b : the types of cells they are made out of
c : a series of yes/no questions
d : whether organisms are autotrophs or heterotrophs

How do you think earths interior affects what is happening on the surface? 2. how do fossils support the continental drift hypothesis? 3. how does sea- floor spreading support the hypothesis of continental drift? 4.what do scientists observe when they studied the magnetic fields of rocks on the sides of mid-ocean ridges? 5. what is a tectonic plate ? 6. explain mantle convection 7.how can movements of the continents affect earths climate? 8. what occurs during drifting?