What are two functions of the muscular system

What would happen to the nutrients in an ecosystem if decomposers, such as bacteria, didn’t exist there?

How do you date a sample of rock that you suspect as being one of the earliest on earth

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?