other than asteroid impacts and intense volcanic activity and sea level changes are there any more possible causes of the cretaceous/tertiary mass extinction (which included dinosaurs)?

Temperature change/change in climate?
This may be a result of other things though.

yeah it is...well it's all good since i completed that section of my report :awesome:

You did a report on the extinction of dinosaurs? :shock:
What was your opinion of the most likely cause of dinosaur extinction?

well its more on dino birds like arcaheopteryx but from research i think it was asteroid impacts along with volcanism and sea level changes. but on 4 march 2010 41 scientists agreed that it was the Chicxulub meteor impact that killed them all, its a massive crater in mexico on the yutican peninsula.

http://lh3.ggpht.com/_1xysjxJbMqY/SX...Map%5B1%5D.jpg

Damn that is big!
That's pretty rare to see an agreement by leading scientists on this topic.

The dust cloud likely caused extinction of some plant species which caused some food chains to collapse.