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Listed under:  Science  >  Life  >  Ecosystems  >  Biogeochemical cycles  >  Carbon cycle
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Why is the ozone hole bigger in the less polluted southern hemisphere?

This article provides an excellent model of a scientific explanation. It addresses the question "if the atmosphere in the northern hemisphere is much more polluted than it is in the southern hemisphere, why is there an ozone hole in the south and not in the north?"

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Rob Harcourt

This 6 minute video segment from Catalyst highlights a number of diverse investigations that are part of the work of a marine biologist. It uses an incredible collection of photographs to inform and inspire people about conservation.

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Solar thermal electricity

This program gives an update on research into solar thermal electricity. Liddell Power Station in the Hunter Valley, NSW is a hybrid power station using solar energy to pre-heat water and so reduce the use of coal and the production of carbon dioxide. Some scientists claim that harnessing the solar heat in an area 50km ...

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Integrated gasification combined cycle

Find out how emissions from coal-burning can be reduced by turning the coal into syngas. This is a fact sheet describing methods of coal gasification, and how the resulting syngas can drive a combined cycle power generator. It lists the advantages of the technology, including lower emissions and increased efficiency, as ...

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Gas-fired power

Find out how gas-fired power stations work. This fact sheet describes the generation of electricity in gas-fired power stations, which typically produce 50 per cent less carbon dioxide than conventional coal-fired power plants. Information is provided about the Daandine Power Station located west of Brisbane, which uses ...

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Coal seam gas

This fact sheet provides information about how coal seam gas or methane is extracted and used as an energy source. It describes several coal seam gas operations in the Bowen and Surat Basins in Queensland. Several photographs and a map of projects in the Surat Basin are also included.

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Drought culprit

This 12 minute video segment from Catalyst is an excellent resource for students researching how oceans influence conditions on Earth's surface. It demonstrates the advantages and disadvantages of using models in science and how our understanding is open to revision as more information comes to light.

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Water: learn it for life! - year 7 science

This PDF unit of work is one of a series of resources accessible by searching the list in the series.It includes two teaching and learning sequences: 'Water journeys' focuses on the water cycle, and 'Pure water' focuses on the processes and people involved in creating and managing drinkable water. It provides Australian ...

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The Reaction of Metals with Acid

Students use this simulation to learn that react with hydrochloric acid to produce salt and hydrogen and find out how to test for hydrogen gas. The notice that sodium reacts violently and that magnesium reacts more quickly than zinc but that the hydrogen gas test is positive for both. Word equations are provided for all reactions.

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Water-powered engine theories need hosing down

This ABC article by Dr Karl addresses the question: will we one day be able to power cars with water? The chemical reactions involved in the formation and decomposition of water are described. Energy transformations are explained. A very useful resource to get students thinking.

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Making a Salt Using an Insoluble Base

Students use this resource consisting of five slides with diagrams, written explanation and voice-over to understand how to prepare a neutral salt sample from an insoluble base. There is a two-question quiz and a summary slide.

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Science Talk 2007: Jack Bacon

An interview with Dr Jack Bacon, NASA engineer and futurist. Jack talks to a teacher from Sydney Girls High School about his experiences on the Vomit comet and his research into alternative energy sources. Jack also shares with us his predictions for the future of science, space travel and energy sources.

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Everyday Neutralisation Reactions

Students use this resource consisting of nine slides with diagrams, written explanation and voice-over to understand everyday neutralisation reactions. There is a two-question quiz and a summary slide.

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Cloud seeding

This nine and a half minute video segment from Catalyst describes how researchers from Monash University have hard evidence that cloud seeding can produce good amounts of extra rainfall. Data collected over a long period of time has give hope to scientists and environmentalists who are trying to reduce the impacts of droughts ...

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Making a Salt Using an Acid and an Alkali

Students use this resource consisting of seven slides with diagrams, written explanation and voice-over to understand how to prepare a neutral salt sample using an acid and an alkali. There is a two-question quiz and a summary slide.

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pH scale

Students use this resource consisting of eight slides with diagrams, written explanation and voice-over to understand that pH is a measure of the strength of an acid or alkali and how to interpret the colours of universal indicator solution. There is a two-question quiz and a summary slide.

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Acids and Alkalis

Students use this resource consisting of five slides with diagrams, written explanation and voice-over to understand how to use indicators to classify solutions as acidic or alkaline. There is a two-question quiz and a summary slide.

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Science Talk 2007: Jeremy Leggett

An interview with Dr Jeremy Leggett, global environmental expert from Solarcentury in the UK. Jeremy talks to a teacher from Leumeah High School about global warming, fossil fuels and the design of carbon neutral buildings.

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Structures and Bonding

This simulation allows students to explore the chemical reactions between hydrogen, oxygen, carbon, nitrogen and chlorine. They can form water, carbon dioxide, hydrochloric acid, ammonia and methane. Word and chemical equations are provided. The diagrams distinguish single, double and triple bonds and shapes of molecules.

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Biofuels

This is a unit of work about ethanol and other biofuels. The unit revises students understanding of the carbon cycle and renewable and non-renewable fuel sources. The inquiry focuses on a series of experiments that examine the effect of temperature on the fermentation of yeast and to determine the flash point of ethanol ...