Penetrating Properties of Radiation



Radioactivity. What is it? Should we b

e worried?

It was Marie Curie who first used the word radioactive to describe a phenomenon discovered by Becquerel in 1896. It...

What Covid-19 has taught us is that the world is not as big as we thought. Almost overnight we realised that we are Global Citizens, and this pandemic affects everyone. So together we need to get the conversations started around...

An angle measures the amount of turn. So how much has been turned. Angles come up everywhere in life… which is why we need to learn about them. The slope on roofs, so that rain and snow slide off. Pilots use angles to make sure they stay...

In the middle of the 20th Century, Psychology transformed thanks to the Cognitive Revolution. So what is Cognitive Psychology, and what is its story from the 1960s to today?

Cognitive biases are little tricks that our mind automatically plays on us. They are clever shortcuts that help us get through the day with the limited mental resources we have, but sometimes they can leave us in sticky situations....

Do you take the credit when things go well for you? Is it your fault when things go wrong? Or are you a feather in the wind, guided through life by the great, mysterious other? These questions are at the root of a psychological concept...

The video is a brief lesson on real numbers, including counting numbers, whole numbers, integers, rational and irrational numbers. The teacher provides examples and challenges the viewer with simple questions.

Learn the basics about the Haber Process and its environmental implications.

We have to calculate percentage changes throughout life, whenever we are comparing two values. The increase or decrease in value of stocks, comparing rainfall or unemployment figures CREDITS Animation & Design: Murray Knox Narration:...

Learn the basics about what salts are, as part of the overall topic of acids and bases.

Why can you see your reflection in some objects? In this video we will look at ray diagrams for reflection, refraction and colour absorption. Visible light is part of the electromagnetic spectrum. Light is a transverse wave, and travels...

In this video you will see how this list can help us predict if a chemical reaction will proceed and how to name the products which shows displacement reactions.

In this video we are going to look at arithmetic sequences in more detail. These are also known as linear sequences.



We will discover how to find the nth term rule, which we will...

Learn the basics about the changes to our atmosphere, as a part of environmental chemistry.



The Earth’s early atmosphere had no oxygen. By examining rocks laid down over earth history we can piece together the...

A Susie Story about the origin of the word Biscuit.

Learn the basics about What makes things alkali? How is alkali recognized? What are alkali chemical properties? Find out more in this video!

This video transcript is a lesson on how to support opinions with clear and focused reasons in writing. The teacher explains the difference between opinions and reasons, provides examples, and guides students in identifying and...

A pathogen is a microorganism that can cause disease. Pathogens may be viruses, bacteria, protists or fungi. Examples of bacteria infections are cholera, typhoid, food poisoning and gonorrhoea. Examples of viral infections are the flu...

Learn the basics about water pollution, whilst learning about environmental chemistry. The substances mankind throws away have polluted lakes, rivers and even the oceans. The United Nations estimate that around 10% of the world’s people...

Learn some more about the hole in the ozone, as a part of environmental chemistry. The hole in the ozone layer has become thinner, mainly due to CFC’s. CFCs are inert stable molecules and were once the wonder chemical. They were...

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In this video, we’re going to look at different types of acceleration and compare acceleration in different exp
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You will learn that acceleration is the rate at which an object
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hanges...

In this video we discuss how to revise for exams - 7 study tips supported by science. See all the tips broken out below and check out the video to understand how they relate to the active recall method of learning: 1. Do a practice test...

Learn the basics about thermosetting and thermosoftening polymers, when learning about polymers as a part of organic chemistry. A polymer is a macromolecule made of many monomers, or repeating units. The properties of these polymers...

Different combinations of metals produce different voltages and this depends on how strongly the metal could force its electrons to move across a cell. The electrochemical series is a list of metals and other substances arranged in rank...