Science / Year 9 / Science Understanding / Chemical sciences

• TLF-IDL2562

See how scientists such as Ernest Rutherford have investigated the structure of atoms. Explore possible models. Fire charged particles at atoms and find which model best fits the results. This learning object is one in a series of six objects. Three of the objects are also packaged as a combined learning object.

• TLF-IDL2564

Explore subatomic particles and how they combine to form atoms. Compare different ways of modelling atoms. Use nuclear symbols to represent different isotopes. Build atoms by combining protons, neutrons and electrons. This learning object is one in a series of six objects. Three of the objects are also packaged as a combined ...

• TLF-IDL2566

Explore subatomic particles and how they combine to form atoms and ions. Compare different ways of modelling atoms. Use nuclear symbols to represent different isotopes. Build atoms by combining protons, neutrons and electrons. This learning object is one in a series of six objects. Three of the objects are also packaged ...

• TLF-IDL8032

Watch radioactive decay happen at the sub-atomic level. Make predictions and analyse graphs resulting from the decay of an array of radioactive atoms in order to determine the half-life of the element. For example, find the half-life of the radioactive element used in carbon dating, carbon-14. This learning object is one ...

• TLF-IDM020101

This is a student guide that takes an in-depth look at chemical reactions with individual chapters on the structure of atoms, chemical changes and formula, radioactivity and nuclear energy, energy changes, and reactions involving acids and bases. Each part or chapter of this resource contains information, images and diagrams, ...

• TLF-IDL8033

Use radiocarbon dating to find and compare the ages of ancient remains. Convert organic samples to gas and use a Geiger counter to measure radioactivity. Use calculations and radioactive decay graphs to estimate the age of the samples. For example, check whether a bone from 'Sthenurus', a giant kangaroo, could be younger ...

• TLF-IDL44

Explore how a smoke detector works in a home. Make smoke in a kitchen to trigger the beeping sound of a smoke alarm. Look at a circuit diagram and magnified view to see how an isotope interacts with ionised gases within a circuit gap. This learning object is one in a series of three learning objects.

• TLF-IDM015359

Resources to help understand and debate the issues around continuing and future use of nuclear energy after the nuclear accidents in 2011 at Fukushima Daiichi and Fukushima Daini and after the Tohoku earthquake and tsunami. Includes links to sites and information for both sides of the nuclear energy debate, including information ...

• TLF-IDM016565

Coming into contact with a large dose of radiation is known to be hazardous. But will it make you light up like a car dashboard at night? Some anecdotes that will engage the students to learn about radioactivity while dispelling a few myths.

• TLF-IDM015329

Links to resources to explore fundamental questions about light and matter and the application of the physics of light and matter to the past, the future and to space. Includes a quick quiz, links to additional DEC NSW physics resources and to the International Science School at the University of Sydney.