any one know about techtonic plates?im in science got 2 nwser loads of questions me and me mate so help plz?

Question

thank you if you know anything about it plz e-mail

Answer 1

I know it's not spelt with a h in the middle, but that's just being pedantic. Try the following link for some more constructive help:

http://en.wikipedia.org/wiki/Tectonic_plates

Answer 2

The Earth's surface is like a broken egg shell. The land (plates" float on a lake of liquid magma. When they bump into each other they cause earthquakes. Although, it takes time to build up force to make an earthquake happen (think about snapping a biscuit - you build up force, then in an instant it snaps - an earthquake is the same)

Over time the plates move, so the continents shift. A few centimetres a year. But over millions of years this adds up to thousands of miles. This is called continental drift.

This process also causes mountains and trenches. Hold a piece of paper straight between two hands so that there is tension. Then move your hands closer together. The paper will either rise in the middle (mountain) or droop (trench). The effect is the same. Hope this helps.

Answer 3

The earth's surface is broken into seven large and many small moving plates. These plates, each about 50 miles thick, move relative to one another an average of a few inches a year. Three types of movement are recognized at the boundaries between plates: convergent, divergent and transform-fault.

At convergent boundaries, plates move toward each other and collide. Where an oceanic plate collides with a continental plate, the oceanic plate tips down and slides beneath the continental plate forming a deep ocean trench (long, narrow, deep basin.) An example of this type of movement, called subduction, occurs at the boundary between the oceanic Nazca Plate and the continental South American Plate. Where continental plates collide, they form major mountain systems such as the Himalayas.

At divergent boundaries, plates move away from each other such as at the Mid-Atlantic Ridge. Where plates diverge, hot, molten rock rises and cools adding new material to the edges of the oceanic plates. This process is known as sea-floor spreading.

At transform-fault boundaries, plates move horizontally past each other. The San Andreas Fault zone is an example of this type of boundary where the Pacific Plate on which Los Angeles sits is moving slowly northwestward relative to the North American Plate on which San Francisco sits.

Plate tectonics, the branch of science that deals with the process by which rigid plates are moved across hot molten material, has helped to explain much in global-scale geology including the formation of mountains, and the distribution of earthquakes and volcanoes.