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NCEA Level 2 Chemistry: Exam revision Structure and bonding

john west — Mon, 09 Nov 2009 22:51:26 +0000

To get the best results in this achievement standard you need be clear about how you organise your answers.

All the basic material you need to know about is covered in three short videos, a complete course reduced to 15 mins!

The first video deals with covalent bonding Lewis structures and Lewis diagrams. There is a short quiz at the end of it.

The second video deals with molecular shape and polarity

The third video deals with metallic and ionic bonding. It also examines properties such as malleabilityor ductility and conductivity when molten or in aqueous solution. The solubility of ionic compounds in aqueous solution is also discussed.

good luck

NCEA level 1 Physics: Serial and parallel circuits

john west — Tue, 01 Sep 2009 22:44:40 +0000

You are going to connect up the three circuits on page 227 of your workbook. You will then investigate the size of the current in different parts of parallel and series circuits using an ammeter.

Before you begin, a bit of revision watching a really boring video on the properties of series and parallel circuits

And now the challenge:

get your mobile phones out
take some pictures or video clips showing what happens during the investigation of the three circuits
make a movie using windows moviemaker or an animated movie using Animoto. (you need to log on and create an account but you can make 30 sedcond videos for free)

complete the worksheets on pages 227-229

There is a strong financial incentive for the producer/s of the best video

formation and eruptions of volcanoes

john west — Fri, 24 Jul 2009 03:53:22 +0000

A group of Y10 students in Shelley’s class delivering information on the formation and eruptions of volcanoes with specific reference to those in New Zealand. It was an outstanding piece of filming, editing and fabulous scientific content (not to mention entertaining!

Structure and bonding : Pottery and the chemistry of silicates

john west — Mon, 29 Jun 2009 08:18:27 +0000

Art is often chemistry that looks good. Your mission should you chose to accept it is explain changes in the properties of clay as it is allowed to dry, bisc fired then given a final firing and glazing.

Starlab visit to Green Bay

john west — Tue, 05 May 2009 00:18:42 +0000

Year 9 students had an opportunity to experience the starlab when it visited on Monday

Use "comments" to leave any questions that you want answers to.

Seventh form 08

john west — Mon, 17 Nov 2008 20:26:34 +0000

What a talented bunch of individuals the seventh form of 08 turned out to be………good luck…..there is life after school.

Year 11 Physics. Aircraft design.

john west — Tue, 19 Aug 2008 23:52:39 +0000

Click on comments at the bottom of this post and answer the questions. The best 5 answers will each receive a mars bar.

First of all watch this clip of a Boeing 767 take off.

A Boeing 767 is travelling at 80 meters per second when it takes off.

(1) What is the speed of the aircraft in kilometers per hour

(2) How long does it take for the aircraft to reach its take off speed from the start (when it is stationary).Time to the point the aircraft just begins to lift off the runway

(3) Use this time to calculate the acceleration of the aircraft as it moves down the runway.

The equation you need is a = (change in speed)/change in time

(4) Calculate the total thrust needed to produce this acceleration by using the equation:

F=ma

The aircraft weighs approximately 200,000Kg when it is fully laden. Remember to use the correct units in your answer.

(5) The shape of the aircraft wing changes as it approaches cloud level. Why is the wing designed to behave in this way.

(6) What airport do you think the aircraft is taking off from, why?

Finally click on the blue comments button below this post to leave your your answers. You will be asked for an email address and there may be a delay in your comment appearing on the blog.

Good luck!

Welcome back to Green Bay High School

john west — Mon, 11 Feb 2008 04:22:13 +0000

Congratulations to all students who achieved success in the 2007 NCEA exams.

Parental support in buying workbooks to assist student learning would be appreciated and the link for 2008 requirements can be found at the top of the page.

Communication with students and parents will be a lot easier this year after work developing science blogs in the latter part of 2007.

Links to the senior Biology , Physics and Chemistry blogs can be found on the sidebar under “Senior Sciences”. Information on the Level 1 NCEA Science course can be found on its own page

Watch this space for outstanding examples of student work and general news and information.

Good luck with your studies

Inaugural Chemistry “Oscars” Winners

john west — Wed, 07 Nov 2007 20:36:25 +0000

Year 12 students as part of their redox chemistry had to do the following.

choose a redox reaction
decide how they were going to demonstrate this reaction to the class
Prepare a short video clip about 1 minute in length to explain the redox chemistry involved.
Use Windows Movie Maker or other editing tool to add captions containing the ion electron equations.

The winning team were Nerdzherd .

And here is their award winning presentation.