more on salt

In this podcast I cover using a microwave to make a pane of salt glass, and the climbing ability of  lite salt or (KCl, NaCl mixture.

Sex

Sex: a close look at Meiosis

Elon Musk

Elon Musk

Thoughts on how Elon fits into science teaching

Metals and Non metals

Just an off the top of my head discussion of the Quantum Physics of nuclei and metals and non metals

https://en.wikipedia.org/wiki/Woods%E2%80%93Saxon_potential

Snowflakes

Snowflakes are built on pollen grains and super cooled water travelling to the crystal points

four leaf clover in a salt xtal

Podcast

1. Dissolve lots of salt 

2. let salt climb wall of beaker

3. wash salt wall back into solution

4 collect giant crystals

Scientific Models for Year 9

Scientific Models for Year 9

MODEL

A mathematical, conceptual or physical representation that describes, simplifies, clarifies or provides an explanation of the structure, workings or relationships within an object, system or idea. Models can provide a means of testing and predicting behaviour within limited conditions.

Convection and Conduction

• PW1Energy transfer through different mediums can be explained using wave and particle models. (ACSSU182)
• Students:

• a.explain, in terms of the particle model, the processes underlying convection and conduction of heat energy

Can you find 3 things wrong with this web page?

Podcast

Link to page http://www.schoolphysics.co.uk/age16-19/Relativity/text/Time_dilation/index.html

Hint there are two errors in the diagram and a small error in the equations given.  I will prepare a podcast soon on this.... but students really are unsettled if they have first invested time, then are a little confused and as a rule don't believe there are errors.

Space riddle

A space craft flies to the star nearest star that is 4 light years away, and takes 20 years in its own timeframe to reach there. It sends a live video of its 20 year journey back to earth. How long does this video play back on Earth?

There are a few more twists to get you thinking