# Science week at Hawkesdale

This week is Science Week around Australia, so we have planned some extra hands-on learning activities. This student is measuring the mass of her sports shoe, in grams and Newtons, for an experiment to test the co-efficients of friction of various surfaces. We use a spring balance to measure the static and sliding friction of the shoe on three different surfaces (carpet, vinyl and asphalt). Students compare their results of shoes with different tread patterns and discuss which sports require shoes with high and low coefficients of friction. Football boots and netball shoes require ‘grippy’ shoes, while ten-pin bowling and ice-skating require ‘slippy’ shoes. (This activity is adapted from “Measurement in Sport”, produced by the National Standards Commission, and reproduced by “Scientriffic“)

The CSIRO have provided hundreds of do-it-yourself science activities you could try for Science Week – Here are some Physics activities, Chemistry activities and Technology projects. Also, the New Zealand government education department has some interactive science games to improve earth science and environmental education.

# Year 8 Science: Simple Circuits

This week we are starting a unit of work on Electricity – you will learn about current and voltage, series and parallel circuits and create your own torch using some readily-available items (cardboard tube, aluminium foil, small light globe, copper wires, cardboard, masking tape and paperclips). Your torch will be asessed for it’s ability to direct a beam of light, turn on and off and be easily operated with one hand.

# Paper Aeroplanes and Scientific Method

This is the last week of term 3 and in Year 7 Science we are doing another exciting science project with Mr Ardito’s class in New York. This project is to design and test the best paper aeroplane – but what defines ‘best’? We decided that, for this project, the best paper aeroplane is the one that travels the greatest distance in the air. Each group of three students tested one aspect of the plane – such as wing-shape, nose angle, length or style of plane. Then each plane was flown five times and the data was collected to obtain the average flight distance. You can view our videos here:
http://www.teachertube.com/view_video.php?viewkey=b696d1098c0e93d2abfc and here

http://www.teachertube.com/view_video.php?viewkey=ae132a75d8f9f87e081c

# What happened milliseconds after the Big Bang?

Photo Source

This week in Cern, Geneva (Switzerland) the world’s biggest machine, 30 years in the planning and making, costing \$4.4 billion dollars, will be switched on. It is the Large Hadron Collider, a 27 kilometer tunnel located 100 metres underground, built to smash atoms together by propelling two beams of protons in opposite directions, 11,000 times a second! Scientists are recreating the conditions that existed a fraction of a second after the Big Bang, hoping to gain an insight into how matter evolved in the early universe. Some people believe that the machine may expose ‘parallel universes’, ‘dark matter’ or tiny black holes, causing a scientific revolution!

# Getting an Eyeball full!

Today Year 7 and 9 scientists dissected sheep’s eyeballs to learn about the structure and function of the different parts. Did you identify the cornea, iris, pupil, lens, retina, vitreous humour and optic nerve? We obtained the eyeballs from the local abattoir and used sharp scalpels, scissors and forceps to firstly trim the fat and muscle from around the eye and then cut a small window, just behind the iris. Then we cut carefully around the brown-coloured iris to remove the cornea and iris. Inside the eyeball was a clear, jelly-like substance (vitreous humour) and the lens. The retina was brightly coloured – a shiny blue/green surface at the back of the eyeball, where the image is focussed. The optic nerve transmits nervous impulses to the brain.