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Listed under:  Health  >  Psychology  >  Cognition  >  Concepts  >  Paradigms
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Outer electrons of atoms

Atoms with 'clothes', orbital zones, valency, and the strange and distinctive shapes created by electrons: explore all of these and more in this clip. You will also discover how electrons in the outer layers of an atom form the basis of chemistry.

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Cathode rays and electrons

Do you know what a cathode ray tube is and how it works? Watch this clip to find out more, and learn about how it led to a vital discovery that underpins our understanding of the structure of matter.

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Development of the periodic table

Cracking the biggest chemical mystery of all. Explore how the Periodic Table of Elements, created by Dmitri Mendeleev in the 1860's, revolutionised chemistry. Find out how the periodic table came to be and how it can be used to describe groups of similar elements.

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Enter the weird world of atoms

All matter is made of atoms, but what do we really know about them? Their structure, relative size, and abundance is demonstrated in this clip using sand grains and motorbike riders on a beach. A scientist also explains the strange behaviour of atoms, which underpins the powerful scientific theory called quantum mechanics.

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Best ever science facts

Do you have a favourite science fact? Listen as scientists from a range of fields describe their favourite facts of the scientific world. If you've ever wanted to know the length of a chameleon's tongue or what the most common cell in your body is, watch this clip.

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Rolling a square wheel?

We all know square wheels can't roll, right? Come ride a bumpy road with a scientist who demonstrates how a wheel works, and why they are round. Witness his determination to create a smooth-rolling, square-wheeled skateboard!

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Living in extreme environments

Extremophiles are organisms adapted to living in extreme conditions, such as very hot or cold temperatures. In this clip our science reporters demonstrate the resilience of some microscopic extremophiles, which they subject to high heat and then view under a microscope to check their survival. Do you think the existence ...

Assessment resource

Tectonics investigator: Earth's structure: assessment

Test your understanding of the Earth's internal structure. Use animations and images to help you answer a series of questions dealing with the seismic exploration of the Earth’s internal structure and the structure of tectonic plates. View and print a report on your work. This assessment object is one in a series of two objects.

Assessment resource

Tectonics investigator: plate movement: assessment

Test your understanding of tectonic plate movement. Use animations and images to help you answer a series of questions dealing with evidence of plate movement. Interpret data from magnetic surveys of divergent zones, as well as patterns derived from hotspot traces. View and print a report on your work. This assessment object ...

Interactive resource

Colossal fossils: the dig

Join a team of palaeontologists working on an Australian megafauna dig site. Dig up and describe a megafauna jaw bone or skull. Use tools such as a pick, rock hammer and scraping knife. Prepare the fossil for removal using tools such a fine brush, glue and plaster. See how the features of the bone are used to identify the ...

Interactive resource

Exploring atoms: atom structure

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.

Interactive resource

Tectonics investigator

Investigate the internal structure of the Earth using earthquake measurements. Examine the Earth’s outer layer. Fit the Earth's tectonic plates together like a jigsaw puzzle. Identify how plate movements produce many features of the Earth’s surface. Predict the formation of new volcanic islands. This learning object is ...

Interactive resource

Tectonics investigator: hot spots

Identify how plate movements produce many features of the Earth’s surface. Predict the formation of new volcanic islands. This learning object is part of a series of three objects. The series is also packaged as a combined learning object.

Interactive resource

Genes

See how genes and genetic engineering work. Build models of DNA, and work out how it is copied as cells divide. Discover how the codes carried in the genes are copied and used to build proteins. See how gene splicing can be used to benefit human lives. For example, model the transfer of a human gene into bacteria, so they ...

Interactive resource

Genes: introduction to genes

Zoom in on a living plant to see views down to the atomic level. Discover how each component consists of smaller parts. Identify the parts that carry the instructions for the plant’s characteristics. For example, observe that the chromosomes are made of DNA. This learning object is the first in a series of five objects ...

Interactive resource

Genes: what is DNA?

Build models of the DNA molecules that make up chromosomes. Discover how the components match up to make a double helix. For example, discover that the bases adenine and thymine pair up to form ‘rungs’ of the helix. This learning object is the second in a series of five objects that progressively increase in difficulty. ...

Interactive resource

Genes: DNA replication

Model the copying of DNA molecules when cells divide. Discover the part played by enzymes in the replication process. Select the correct base pairings to complete the DNA double helix. For example, pair adenine with thymine. This learning object is the third in a series of five objects that progressively increase in difficulty. ...

Interactive resource

Genes: protein synthesis

Model the process that living cells use to build protein molecules. First, build an RNA strand to copy the gene code of the DNA. Then follow the RNA out of the nucleus to the ribosomes and use a triplet code to pick the correct sequence of amino acids to build the protein. For example, match the code UCU with the amino ...

Interactive resource

Radioactive decay

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 a ...

Interactive resource

Radioactive decay: half life

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 ...