is this ok?

harry hess studied the arced chains of islands with active volcanoes. in 1953 he discovered the great global rift. he is also know for his theriores on the sea floor spreading.

alfred Wegener. alfred is remembered by his theory of the continentail drift. he suggested the earths crust 1 contentinal block floating, he used land fossils climate evidence to support is view on the contintial drift. in 1912 he argued that all the contients once joined together and eventually drifted apart

Scooby -- what happened to your capital letters? What happened to proofreading and spell check? Your 8 sentences are full of mistakes that college students should not make.

Your content about these historical figures is good.

In addition to correcting what you have, you also need to complete the assignment.

i just typed it out fast. I am in doing this part now. (what the process is of mantle convection?) i just wanted to make sure i did the other part right.

The two historical figures are Harry Hess and Alfred Wegener.

Harry Hess studied the arced chains of islands with active volcanoes. In 1953 he discovered the great global rift. He is also known for his theories on the sea floor spreading.

Alfred Wegener. Alfred is remembered by for his theory of the Continental Drift. He suggested the earth’s crust one continental block floating. He used land, fossils, and the climate evidence to support is view on the continental drift. In 1912 he argued that all the continents were once joined together and eventually drifted apart from each other.

Ahh -- Scooby -- this is MUCH better!!! Thank you!

In your last paragraph, we do not refer to adults by their first name. Use Wegener, not Alfred.

Also -- read your second sentence in this paragraph. You left a word out.

In the third sentence, I think you mean "his" not "is."

i am having trouble with plate movement and mantle convection. any ideas?

I suggest you go back and watch the video again. It probably shows and explains these two concepts.

plate movement is the shifting of the Earth's core and crust. plate movement can cause earthquakes, and tidal waves. the earth's outter shell is called the lithopshere. the movement of the plates are catorgorized in thre types. the thre types are convergent, divergent, and transform. Convergent means the plates move into on another. divergent means the plates move aprt from each other. finally transform mean they move sideways.

* i know there is spelling errors etc.. but typed it fast. just want to make sure it is correct

Yes. That appears right. :-)