Group items tagged

"http://yt.cl.nr/ZXcS3oY9wQo"

Tsunami: why and where they originate and propagate.  A trip through the Earth's history from its formation to the present tectonic motions causing earthquakes and tsunamis. 

Rubidium dropped in water!!!

The evolution of the peppered moth over the last two hundred years has been studied in detail. Originally, the vast majority of peppered moths had light colouration, which effectively camouflaged them against the light-coloured trees and lichens which they rested upon. However, because of widespread pollution during the Industrial Revolution in England, many of the lichens died out, and the trees that peppered moths rested on became blackened by soot, causing most of the light-coloured moths, or typica, to die off from predation. At the same time, the dark-coloured, or melanic, moths, carbonaria, flourished because of their ability to hide on the darkened trees.

Journey back in time to the Ice Age and witness one of the world's deadliest animal killers - the tar pit. With enough force and consistency to kill a fully grown mammoth, was crude oil the biggest threat to species survival in early Earth?

Instructor Blaine Greenhalgh explains the doppler effect. Good animation of man walking with a light globe.

This song explains how the decay of a radioisotope has a half-life and how to use that half-life to solve decay problems. Corny but clear science. May appeal to some students!

Amusing song about quarks.

Goes well beyond the syllabus but has some good animations. Suitable for more capable classes.

Technique for performing a manual titration with an indicator using a burette.