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What is Homeostasis?
So what is homeostasis is a term first defined by Claude Bernard in 1865 it means maintaining a constant internal environment this is a bit like car brain works senses all around the body imaging various things and sending the...
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Solubility Rules
Learn the basics about solubility rules for insoluble salts, as part of the overall acids, bases and alkali topic.
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Paper & Thin Layer Chromatography
Learn the basics about Paper and Thin Layer Chromatography. What is Chromatography and why is it done? Find out more in this video!
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How Does Water Bond - Covalent Bonds
Learn the basics about the covalent bonding of water, when learning about covalent bonding within properties of matter. Water is made from one oxygen atom and two hydrogens. The oxygen has 6 electrons in its outer shell, but it really...
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How Are Organisms Classified?
In terms of biological classification, organisms are classified, or grouped, with other organisms that they are most closely related to. These small groups are then classified together into larger groups and so on, until we reach the top...
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Memory
Have you ever walked into a room and completely forgotten why you’ve gone in there? Or smelled a familiar scent that made you think of another time or place in your life? In this video we’ll look at how your memory works. Memory refers...
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What Are Periods & Groups In The Periodic Table?
What's the difference between periods and groups in the Periodic Table and why are the elements structured this way. Find out in this video from the Properties of Matter chapter of the Virtual School GCSE / K12 Chemistry.
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BIOLOGY - Evolution -Competition & Natural Selection
In nature, all organisms compete with each other for resources in order to survive. Competition between members of the same species is what makes organisms evolve. This theory of competition and ‘survival of the fittest’ is called...
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Ecosystem Management
Regardless of the habitat type, method of management, or end goal, ecosystem management plays a large part in modern society. Without effective ecosystem management, we would have much less access to the resources that we use for our...
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BIOLOGY - Environment - Sustainable development
Like all living organisms, humans need resources to live. We need food, clean water and a shelter to live in. A few thousand years ago, this is all we would have wanted - a full stomach and a warm, dry home. But, as the human race has...
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Small intestine and food absorption
Small intestine and food absorption Digestion goes hand in hand with absorption… which happens in your small intestine. Which is what we’re going to look at in this video. So keep watching!
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GMOs
Genetically modified organisms, or GMOs, have had their DNA artificially modified by humans, using modern genetic manipulation techniques. By changing the DNA, so changing the genome of an organism, means we can change its...
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The Immune System
The main role of the immune system is to prevent disease caused by infection. Infections can be caused by a wide variety of pathogens, including bacteria, fungi, parasites (such as malaria) and viruses (such as influenza and the common...
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MATHS - Probability - Mode
The average of Bob’s running times could be 44, 45 or 46 minutes... Times (in minutes): 51 48 45 44 47 50 44 47 45 43 49 44 43 44 Mean: 46 minutes Median: 45 minutes Mode: 44 minutes This is because there are 3 different ways of...
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Global Warming - Evaluating the Evidence
Learn the basics about global warming as part of the environmental chemistry topic.
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PHYSICS - Matter - Atom Structure
I this video you will see how we can use the periodic table to tell us more about the differences between elements, including the different numbers of protons, neutrons and electrons they possess.
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Life Cycle Assessment
Learn the basics about Life cycle assessment. What is the life cycle of a product (before it gets recycled or not) ? What stages does it go through? Find out more in this video!
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Human impacts on Biodiversity
Biodiversity is the variety of life. There are thought to be 8.7 million species on planet Earth. And, as we saw in this video, biodiversity is of utmost importance to humans. The loss of one key species can have a detrimental impact on...
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Fossils & Evidence For Evolution
The theory of evolution states that individuals within a species show wide degrees of variation, and those individuals with characteristics best suited to their environment are more likely to survive and reproduce. This theory grew from...
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Careers in Biology
In this video, you'll learn a wide range of marvelous careers in the world of Biology, you might be surprised on what you see!
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Food Chains & Food Webs
A food chain is a single path, which help us to work out who eats whom in a habitat, in order to get the energy and materials required for nutrition. Typically food chains involve around four steps. It is unusual for them to be longer...
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Mitosis - Stages of Mitosis
In this video we are will look at mitosis, including the names of the key stages: interphase, prophase, metaphase, anaphase, telophase and cytokinesis. Mitosis is the process of cell division that produces identical copies of cells, and...
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What is Mitosis?
Mitosis produces identical copies of cells, and is involved in growth, cell repair and asexual reproduction - which is how simple organisms reproduce. When cells divide by mitosis, two new cells form and each cell is identical to one...
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MATHS - Statistics - Bar Graphs
I want to investigate how population has changed in these cities…but these numbers are just numbers. They don’t mean anything to me. In this video, we are going to discover how great bar graphs are for providing us with a clear visual,...