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End Of Course Earth Science 2007 Answer Key

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BBC Asteroid Impact Simulation End Of The World Predictions

A huge asteroid with a diameter of 500 Kilometer is going to impact on Earth! Destination: Pacific Ocean. The asteroid impact peels 10 kilometers crust off the surface of Earth. The resulting shockwave travels at hypersonic speed. The debris from the impact is blasted to the lower orbit of Earth, and they returns to destroy everything on the planet. The firestorm created by the asteroid impact encircles the Earth,

vaporizing everything in our world. Within 24 hours of asteroid impact, the entire Earth will be uninhabitable. The researchers have found that this scenario has happened 6 times in Earth's history.

A Preview of Alice 30 Introductory Programming in 3D

gt;gt; Welcome everyone to today's Techtalk onthe Alice programming language. I'll point out, we have Peter Norvig here today. He'sone of the biggest fans of Alice. Peter and his daughters I believe, righté I'm pleasedto welcome my friends from Carnegie Mellon, who are here today, to talk briefly aboutthe Alice 3D authoring environment. And they'll show us how it fits into Computer ScienceEducation. As many of you know, Randy Pausch started working on Alice back in the early1990s. And these are the folksthis is the team that he is entrusting with her future.I've known Randy for many years and I've been keeping a close watch on the Alice team andthe progress going forward. Today, we'll hear

from Dennis Cosgrove and the team about thefuture of Alice. Dennis was discovered by Randy Pausch. And then I'm told carefullyconscripted into indentured servitude for the Alice project right from the beginning.Dennis has coauthored several papers and presented at various conferences includingSIGCHI. And able to be with us today is Caitlin Kelleher, an assistant professor of ComputerScience at Washington University in Saint Louis. Caitlin's graduate work at CarnegieMellon featured the development of storytelling Alice, which iswhich introduces programmingas a tool for telling stories. However, we are pleased to welcome Wanda Dann and DanJenkins from Carnegie Mellon. Wanda recently

accepted a position, a faculty position atCarnegie Mellon and now serves as the director of the Alice project. A role for which shewas handpicked by Randy Pausch. Please join me in welcoming the Alice team to Google.gt;gt; DANN: Thank you. I wish to begin by thanking all of you for being here today and thankyou to Jeff Walsh for arranging this meeting and to all of you for allowing us to givethis presentation today. We want to particularly extend our thanks to Google for your continuoussupport of this project. The Alice project has been a part of Carnegie Mellon Universityfor the last 10 years. And I have been very pleased to join in that research group. Asan overview of our presentation today, we're

going to first talk about what Alice is. Thenwe will take a look at the current version of Alice, how it is being developed and researched,and its impact on preCS1 and high school students. By CS1, we mean the first rigorouscourse in computing majors at colleges and universities nationwide. Then we will takea look at Caitlin Kelleher's work with a special version of Alice called Storytelling Alicethat she has tested with little schoolgirls. And finally, we will take a look at the futureof Alice and the next version, which will be Alice 3.0, and our push in to CS1. Aliceis a 3D graphics and animation environment. It has a draganddrop interface. It allowsthe students to create a virtual world in

which they put various objects and then tella story, create a game, perform an animation task. You're going to see a demonstrationof this environment in a few minutes. What are the research goals of this group and howdoes Alice 2.0 fit into or reach those goalsé Well, basically when we began to work in developingAlice 2.0, our goal was to better prepare students for a rigorous CS1 course. I do wantto stress the preparation part of this. We do this in introductory programming coursesin high school and what are called preCS1 courses at the freshmen level in college.I do want to make absolutely clear that we are not trying to dumb down CS1. What we havebeen trying to do is to better prepare students

to do a good job in CS1 and we want to allowprofessors who are teaching the rigorous CS1 course the opportunity to actually strengthenthe curriculum in that course. So how do we better prepare students for success in a rigorousCS1 courseé Our goal has been to focus on the fundamental programming concepts. So wearen't really departing from the traditional kinds of concepts. We simply want to go aboutpreparing students for understanding these concepts to greater depth. And we also wantto make it easier to add into the traditional curriculum the objectoriented concepts. Thishas been a struggle for Computer Science instructors in college and university level because westill have the 14 weeks during the semester

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