Plate tectonics question!!! help!!?

Question

list the main pieces of evidence behind the theory of plate tectonics and explain what each piece of evidence tells us.


please help. its for homework and i have no idea what to put!!

Answer 1

Introduction
Plate tectonics is a relatively new theory that has revolutionized the way geologists think about the Earth. According to the theory, the surface of the Earth is broken into large plates. The size and position of these plates change over time. The edges of these plates, where they move against each other, are sites of intense geologic activity, such as earthquakes, volcanoes, and mountain building. Plate tectonics is a combination of two earlier ideas, continental drift and sea-floor spreading. Continental drift is the movement of continents over the Earth's surface and in their change in position relative to each other. Sea-floor spreading is the creation of new oceanic crust at mid-ocean ridges and movement of the crust away from the mid-ocean ridges.

Answer 2

Tectonic plates: note that the continents seem to look like they once could have been together, but the plates shift, thus moving the continents around. Volcanoes and earthquakes occur at fault lines where the plates meet and run into eachother.

Answer 3

earthquakes are the evidence, and they tell us that the plates are slipping.Sometimes this causes a weak spot that allows the magma to rise to the earth's surface and forms a volcano. Hope this helps you--Good Luck

Answer 4

The general "fit" of continents separated by an ocean.

Measurements of movements of continents.

The reversal of the magnetic field detected in rocks equidistant from mid ocean ridges.

Earthquakes and volcanoes in locations consistent with the theory.

Similar species of plants and animals in different continents.

Answer 5

Try the link below, it tells you all about it.
http://www.oceansonline.com/plate.htm