Uploaded November 2023 | Updated September 2026, 12 hours ago
For thousands of questions and detailed answers, check out our GCSE workbooks amazon.co.uk/Dr-Shaun-Donnelly/e/B084FH9JPF?ref_=dbs_p_pbk_r00_abau_000000&_encoding=UTF8&tag=freesciencele-21&linkCode=ur2&linkId=1fbc0f5c3e7450e895637b56ee343168&camp=1634&creative=6738
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This is the first video in the working scientifically part of the GCSE Science specification. We look at what is meant by the independent variable, the dependent variable and the control variables. I use the required practical on stretching a spring to show you what is meant by these variables.
This video is based on the AQA GCSE specification. If you are following a different exam board, then I recommend that you check your specification.
For thousands of questions and detailed answers, check out our GCSE workbooks amazon.co.uk/Dr-Shaun-Donnelly/e/B084FH9JPF?ref_=dbs_p_pbk_r00_abau_000000&_encoding=UTF8&tag=freesciencele-21&linkCode=ur2&linkId=1fbc0f5c3e7450e895637b56ee343168&camp=1634&creative=6738
Great deals on workbooks for schools freesciencelessons.co.uk/school-licences
This is the first video in the working scientifically part of the GCSE Science specification. We look at what is meant by the independent variable, the dependent variable and the control variables. I use the required practical on stretching a spring to show you what is meant by these variables.
This video is based on the AQA GCSE specification. If you are following a different exam board, then I recommend that you check your specification.
![GCSE Chemistry Revision Elements, Compounds and Mixtures
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In this video, we look at elements, compounds, mixtures and molecules. First we look at the idea of an element, using examples from the periodic table. I then show you the definition of a compound and what is meant by fixed proportions. We then explore the definition of a mixture and the differences between mixtures and compounds. Finally, we look at what is meant by the word molecule and see how molecules can be elements or compounds.
This video is based on the AQA spec. This video may be appropriate for iGCSE / O Level Chemistry. Please consult your specification. The Amazon link above is an affiliate link. This provides a small commission which helps to support freesciencelessons. The cost remains the same to you. If you prefer not to use this, you can search Amazon for the Freesciencelessons workbooks.
Image credits:
Magnesium https://commons.wikimedia.org/wiki/File:Magnesium-2.jpg
By Jurii (http://images-of-elements.com/magnesium.php) [CC BY 3.0 (https://creativecommons.org/licenses/by/3.0)], via Wikimedia Commons
Sulfur https://commons.wikimedia.org/wiki/File:Sulfur-sample.jpg
By Ben Mills [Public domain], from Wikimedia Commons
Magnesium sulfide https://commons.wikimedia.org/wiki/File:Lithium_chloride.jpg GCSE Chemistry Revision Elements, Compounds and Mixtures](https://i.ytimg.com/vi/nUzOXy9V-K0/mqdefault.jpg)


![GCSE Chemistry Revision Metals and Alloys
Find your 9s with PLUS. Click the link to try for free https://www.freesciencelessons.co.uk/modules/gcse-chemistry-1-triple/
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In this video, we look at the properties of metals and of alloys. First we explore the structure of metals, looking at metallic bonding and the sea of delocalised electrons. We use this to explain why pure metals can be bent and shaped, why metals can conduct electricity and heat and why metals have high melting and boiling points. We then look at the structure of alloys and use this to explain why alloys are harder than pure metals.
This video is based on the AQA spec. This video may be appropriate for iGCSE / O Level Chemistry. Please consult your specification. The Amazon link above is an affiliate link. This provides a small commission which helps to support freesciencelessons. The cost remains the same to you. If you prefer not to use this, you can search Amazon for the Freesciencelessons workbooks.
Image credits:
Gold ingot (By Swiss Banker [Public domain], via Wikimedia Commons)
Bronze guitar string (By Badagnani (Own work) [GFDL (http://www.gnu.org/copyleft/fdl.html) or CC BY 3.0 (http://creativecommons.org/licenses/by/3.0)], via Wikimedia Commons) GCSE Chemistry Revision Metals and Alloys](https://i.ytimg.com/vi/o56nWrsp-hI/mqdefault.jpg)




![GCSE Chemistry Revision Alpha Scattering Experiment
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In this video, we look at the alpha scattering experiment. First we look at what the ancient Greeks thought about the structure of atoms and how this was disproven by the discovery of the electron. We then explore an early model of atomic structure called the plum pudding model. Next we look at the alpha scattering experiment. We explore how the alpha scattering experiment was carried out including why gold foil was used. We then look at how the results of the alpha scattering experiment told scientists that atoms are mainly empty space, with a central positive nucleus containing most of the mass of the atom and electrons around the edge. Finally, we look at how scientists replaced the plum pudding model with the nuclear model of atomic structure.
This video is based on the AQA spec. This video may be appropriate for iGCSE / O Level Chemistry. Please consult your specification. The Amazon link above is an affiliate link. This provides a small commission which helps to support freesciencelessons. The cost remains the same to you. If you prefer not to use this, you can search Amazon for the Freesciencelessons workbooks.
Image credits:
Democritus (By Original uploader was Odysses - Museo archeologico nazionale di Napoli, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=18503479)
Plum pudding (https://commons.wikimedia.org/wiki/File%3AJersey_Christmas_pudding_pod%C3%AEn_dflieu.jpg
By Man vyi (Self-photographed) [Public domain], via Wikimedia Commons)
Gold foil (By Eckhard Pecher - Own work, CC BY 2.5, https://commons.wikimedia.org/w/index.php?curid=1465931) GCSE Chemistry Revision Alpha Scattering Experiment](https://i.ytimg.com/vi/qAlpNXO_FRE/mqdefault.jpg)

