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1. Principles of Chemistry

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making metals

making metals

IGCSE Chemistry

We think that stone age / bronze age man discovered iron by accident . Man must have used fire and probably had a firepit which was used every day. Over time charcoal ( which is mainly carbon) would have built up. Ancient man probably used rocks to contain his firepit. It seems possible that some of these rocks were iron bearing rock...

Edexcel Chemistry A level - Core practicals

Edexcel Chemistry A level - Core practicals

Chemistry A Level

CP 2CP3CP6CP9CP11CP13a CORE PRACTICAL 2: Prepare a standard solution from a solid acid and use it to find the concentration of a solution of sodium hydroxide Enter your text here ... This video shows the preparation of a standard solution of sodium carbonate.  What mass of solid acid would be needed to prepare the same quantity of dilute ...

Batteries

Batteries

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more reactive metals will displace less reactive metals e.g the furry worm

In the "furry worm" experiment the reactive magnesium metal reduces the less reactive copper.   In this post we are going to investigate how metals can be used to make electric (voltaic) cells.  A reactive metal will transfer electrons to a less reactive metal. This can happen directly as in a displacement reaction or we can set thin...

furry worm

furry worm

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Topic B1 Cell Biology
Vasyl
IGCSE Biology
Cells are the building blocks of life Cells are the building blocks of every organism on Earth. In this video we find out about the huge range and different types of plant and animal  cells and various specialised cells. . Cells can be either Prokaryotic or Eukaryotic. Eukaryotes are organisms which contain eukaryotic cells. Organisms containing prokaryotic cells are called prokar...
ENERGY CHANGES
Vasyl
GCSE Physics
A Gravitational Potential energy store Study the image to the left - it shows a dam and reservoir which is used to generate electricity cleanly. In this case gravitational potential energy is converted to kinetic energy in water in the pipes - which then turns the turbines connected to electrical generators which convert the kinetic energy to electrical energy. Energy Stores Thermal &nb...
Viruses
Jayne S
students
An image of a virus particle Viruses cause diseases such as the common cold, COVID-19, mumps, measles, HIV and Polio to name but a few. It is common at A Level to be asked why viruses are classed as 'non-living' or why antibiotics are not used when someone is infected by them. In this post, we will discuss the answers to these two important questions and ex...
Hydrogen Energy
Vasyl
Uncategorized
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Fat for fuel .
Jayne S
A level biology
Biodiesel: used cooking oils and fats can be used as an alternative to fossil fuels to power vehicles.  In this post, Jayne gives examples of different types of lipids and explains what they are composed of and their corresponding functions in the human body. There are different types of Lipid found in living organisms. Triglycerides, phospholipids and sterols are those you are likely to come across at A Level. A typical question may ask you to descr...
PPT : Periodic trends
David Fowkes
teachers
DOWNLOAD FREE FULL VERSION This embedded web version will show the key trends in properties across the periodic table. For full functionality please download the full powerpoint file    Use this video to demonstrate the main periodic trends in properties of elements in the periodic table.  This powerpoint presentation ...
Good carbs / good carbs ?
Jayne S
students
Carbohydrates in one form or another are found in in very many foods. Carbohydrates or "Carbs" are not only essential components of a balanced diet, providing energy and fibre, but can also provide the raw materials to produce useful, biodegradable "eco"polymers .  Jayne explains.. The truth about carbs - NHS Carbohydrates are the body's main source of energy, but the idea that "car...
Not enough carbon dioxide!?
David Fowkes
students
The Odessa port plant in the Ukraine produces ammonia and other nitrogenous fertilisers.   Scientists agree that too much carbon dioxide is still being released into the atmosphere by human activity. Yet in this recent article, the BBC report on how a shortage of carbon dioxide is causing concern for meat producers and consumers amongst others.... Carbon dioxide 'threatens food security' says meat  industry - BBC...
Eukaryotic and Prokaryotic Cells
Jayne S
students
A high power image of bacterial cells. Comparing Eukaryotic and Prokaryotic Cells In this post Jayne explains how to compare and contrast Eukaryotic and Prokaryotic cells. At A Level there is often a question asking you to give the differences between the two types of cells. Interestingly, the word 'eu' means 'true' and the word 'karyon' refers to 'nucleus.' So 'Euka...
Biology revision aids
Jayne S
students
Explaining Biology Clearly - you tube.  Jayne now has a youtube channel where she is sharing her "no frills" explanations of the major biological ideas, concepts and knowledge to be found in the current A level courses.  These are simple, no frills explanations produced live by Jayne with her pen, her whiteboard and her calm, clear, ...

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