Question

Plate tectonics is the theory that the Earth’s crust is made up of plates that glide over a layer of mantle. A prediction of this theory is that the plates will move relative to each other as they move over the mantle. To test this hypothesis, a scientist places a marker on two adjacent plates to measure their movement over a decade. What would be the expected result of the experiment? How would you interpret the results if the scientist sees no movement?

Answer 1

Answer: So the result of this experiment would be that the makers are either further  away from each other or closer to each other, confirming that the tectonic plates which are moving and are not static.  North America plate, and on the South American plate, they move at pretty much the same speed, and also in the same direction, so with setting up makers we can not get to valid result. This is why they don't see no moment. 

Answer 2

Answer: The result for this given experiment is that makers are further away from each other or closer to each other.  North america plate and the south plate can move at the same speed, the same direction, by the same time. This is why they don't see no movement.