Baking Powder and Baking Soda....what's the difference?

Both of these raising agents contain a carbonate (Sodium Bicarbonate) which behaves in a predictable way when reacted with an ACID.

The general reaction
ACID + CARBONATE ----> METAL SALT + WATER + CARBON DIOXIDE.

It is the carbon dioxide gas that produces bubbles of air that makes the mixture rise. Click on this link to find out more.

Parts of an eye

Click here to see an online dissection so that you are familiar with the parts and function of the eye

Y10 Revision Guide - Mr Waring's Model Answers

Click on the following link to access model answers provided my Mr Waring

What is fractional distillation?

Fractional distillation is separating crude oil into other useful components such as LPG, petrol, kerosene and diesel. You can see how this is done by watching the following animation and Powerpoint. 

Y10 Revision class

Revision classes are running in B11 from 1530-1730 on the following dates
Monday (19th November) - Botanix and Forces
Tuesday: pHizzing and Hutt Rocks
Wednesday - Taha Tinana and Son et Lumiere
Friday - Science at Work and Current thinking

Come with questions and snacks.

Forces Lab

Explore the following interactive forces lab. Remember forces are measured in Newtons (N) and forces act in pairs (Weight/gravity vs Support force and Thrust vs Friction). The net or resultant force is the amount and direction when one force is subtracted from its pair.

Why bother with Sex? (Sexual vs Asexual strategies)

Almost all organisms on the planet are a result of sexual reproduction, sex must be an advantage. Find out about some organisms that reproduce by asexual reproduction. What are the costs/benefits??
Click here for video

The reproductive role of Flowers

Find out about the costs and benefits to plants of flowering and how plants avoid self pollination (remember pollination is defined as the transfer of pollen to stigma whereas fertilisation is when the male gamete/pollen fuses with the female gamete/egg. Click here

Selective breeding in Cattle

Click on the following link to find out about how humans have developed over 800 breeds of cattle. Selective breeding is when we 'select for desirable traits' by controlling which parents breed together. Examples can be seen in cat and dog breeds, flowers and vegetable crops.

Magnetism and mapping magnetic fields

Click on the following link to see the image of a magnetic field, and how magnets are used in space to map the field of planets!

Chicks' genders revealed (sex linked traits)

Genders revealed......
Sorry Fran you are a male.....now called Frank
Inigo..........luckily we gave you such a manly name!
Benedict and Pingu our two cute soon to be hens!!
Find out more about how sex can be determined in young chicks using secondary sex characteristics in sex linked traits
http://www.ehow.com/how_6101169_tell-barred-rock-baby-chicks.html

The 'cute chicks' in B11

Inigo the 'fourth born' - a real attention seeking and needy chick who is just so cute!

 Left to right - Fran (Frank), Inigo (photo bombing!), Pingu, and Benedict

 Pingu, Fran (who we think is the most dominant of the chicks at this stage), and the others enjoying their first experience of grass

Inigo and Benedict (youngest and oldest) snuggle up.

SunAeon Solar System Simulator

SunAeon Solar System Simulator:

'via Blog this'

Local Scientists

Ever wondered what GNS stood for? What do the Geological and Nuclear Scientists based at Avalon and Gracefield do? You can find out more about the work of these Lower Hutt Scientists at the following link
For the teams investigating 'what causes earthquakes', or the team studying 'effects of earthquakes and monitoring earthquakes', you may wish to contact a scientist for an interview. See your teacher if you want help in approaching a scientist.

Wellington fly over

Check out the following 10 minute video for an awesome perspective of the Wellington Fault Line. Click here

2012 ICAS Australian Science Competition

SCIENCE Years 9-13 - entries are open now!! This is a 1 hour written test in June. A great chance to test yourself-too see how you match up to other students here at HVHS, in Wellington and across NZ. The entry fee is $8. You have just 1 week to enter at the Resource Centre. Entries close on Friday 6 May.

Sexual and Asexual Reproduction in plants

Roots and shoot growing from an Avocado seed (sexual); roots growing from an African Violet cutting (asexual) , roots growing from an Orchid offset (sexual)

BBC Bitesize - Variation, Natural Selection

Explore these BBC pages to find out more about classification, variation, natural selection and genetic engineering.
Click here
An activity can be found here

BBC Bitesize - Forces

The following resource may be useful to you in revising gravity, friction, balanced and unbalanced forces and drawing force diagrams (note - pressure and moments are not in this unit)
Click here

BBC Bitesize - Magnetism

The following BBC resource may be useful to you in revising bar magnets, finding the magnetic field and increasing the strength of electromagnets (note - electrolysis is not in this topic)
Click here

Acid-Base reaction - treating a jellyfish sting

Watch the following video clip.
Neutralising a jellyfish sting

If an acid (Vinegar) is effective in reducing pain, neutralising the sting, what does this tell us about the sting of a jellyfish?

What causes car crashes?

Complacency, driver error, car condition and the road conditions are all contributing factors to car collisions. To find out more watch some of the following video clips
•Crash test compilation 
•Crash comparison different speeds
•Newton’s law of Inertia
•Crash with and without seatbelt
•Understanding car crashes
•Jeremy Clarkson on breaking distances