Curated Video
Filtration and Evaporation
We use filtration and evaporation to separate out a mixture of water, sand and salt. The sand is removed using filtration, as it did not dissolve in the water. The remaining solution is heated until the water evaporates, leaving behind...
Curated Video
Ferrofluids
We compare the properties of three iron mixtures: iron and water, iron and oil and a ferrofluid - a mixture of compounds containing iron and oil. First, we look at how iron filings behave when mixed with water and then oil. We then hold...
Curated Video
Kiwi Fruit DNA
We extract the DNA from a kiwi fruit by mashing it with detergent liquid, salt and water. The mixture is then filtered and incubated before a layer of chilled ethanol is added. The jelly-like DNA can then be extracted. Biology - Cells...
Curated Video
Making Slime
We make slime using borax, water and food colouring. The slime is a non-Newtonian liquid. A non-Newtonian liquid can behave like a liquid or a solid depending on the pressure applied to it. Chemistry - Atoms And Bonding - Learning...
Curated Video
Distillation of Ink
We use distillation to remove the water from ink. The ink is heated in a conical flask with a delivery tube running to a beaker. The water has a lower boiling point and so it evaporates before the ink. The water condenses as it travels...
Curated Video
Chemical Filtration
We look at how chemical filtration can be used to remove contaminants from water. Potassium permanganate is used as the contaminant. First, we try to remove it using physical filtration, with filter paper and a funnel. This does not...
Curated Video
Burning Bubbles
We investigate the properties of two types of gas bubbles: methane gas bubbles and bubbles of the gas we breathe out. The air-filled bubbles sink and we are unable to set them alight, while the methane bubbles float upwards and are...
Curated Video
Extracting Lead
We discover how to extract lead from lead(II) oxide. We mix lead(II) oxide with charcoal powder and then heat the mixture using a Bunsen burner. It glows bright red as a reaction occurs and after a few minutes we are left with pure lead....
Curated Video
Forming Iron Sulfide
We examine the different properties of iron and sulfur when they are mixed and when they are chemically combined. When iron and sulfur are mixed they retain their individual properties. When they react chemically to form iron sulfide...
Curated Video
Extraction of Aluminium
Explore the difficulties of extracting aluminium from its ore, and how the vast quantities of heat and electricity generated by electrolysis allow this to happen. Chemistry - ReactionsLearning Points. Aluminium is difficult to extract...
Curated Video
Salt: Separating Mixtures
Salt is found in the oceans and Earth's surface. How do we collect this salt and separate it from the materials it is mixed with? Chemistry - Atoms And Bonding - Learning Points. Salt is found in oceans, lakes and underground rock beds....
Curated Video
What is a mixture? – Jigsaw
What is it? ... It's a fruit salad! Material processes - Separating mixtures - What is a mixture? A Twig Tidbit Film - Jigsaw. An image is slowly revealed as pieces of the jigsaw are removed. The children have to identify it.
Curated Video
What is a mixture? – What's that noise?
What's that noise? ... It's a blender! Material processes - Separating mixtures - What is a mixture? A Twig Tidbit Film - What’s that noise? The children have to identify an object from its sound alone.
Curated Video
What is a mixture?
Find out what makes a mixture, and what happens when materials react chemically. Material processes - Separating mixtures - What is a mixture? Learning Points A mixture is formed when different materials are combined without chemical...
Curated Video
What is air?
You may not think about it much, but air is everywhere and it is essential to life. Material processes - Solids, liquids and gases - Characteristics of air Learning Points Air is a mixture of gases including nitrogen and oxygen. Air...
Curated Video
Blood donation
Explore the substances that make up blood and why it is classed as a mixture. Material processes - Separating mixtures - What is a mixture? Learning Points Mixtures do not react chemically and can usually be separated. Blood is a mixture...
Curated Video
Smog - Air Pollution
Find out how harmful gases in the air can react together to create smog ... a form of air pollution. People and places - Human impact on the environment - Polluting the air Learning Points Smog is a mixture of harmful gases that react...
Curated Video
Advanced separation
Find out how advanced separation processes are used to separate substances in complex mixtures. Material processes - Separating mixtures - Other means of separation Learning Points Chromatography separates pigments in a liquid....
Curated Video
Why do hot air balloons float?
Find out how hot air balloons work. Material processes - Solids, liquids and gases - Gases Learning Points Air is made up of different gases. The molecules in gas are widely spaced. When heated the molecules of a gas move around and...
Curated Video
Separation by evaporation
Learn how to find out the difference between tap water and spring water. Material processes - Separating mixtures - Separation by evaporation Learning Points Evaporation can be used to separate a solution. A solution is formed when a...
Curated Video
Fractional Distillation - Oil Separation
Learn about fractional distillation and how it is used to separate crude oil. Material processes - Separating mixtures - Other means of separation Learning Points Distillation separates liquids using their different boiling points. The...
Wonderscape
Identifying Chemical Reactions: Observable Signs and Indicators
Explore the various changes in properties that occur as a result of chemical reactions. Learn how to recognize signs such as color change, emission of odor, production of gas, and formation of precipitates, with practical examples like...
Curated Video
Deep Learning - Recurrent Neural Networks with TensorFlow - GRU and LSTM (Part 1)
In this video, you will learn about modern RNN units called GRU. This clip is from the chapter "Recurrent Neural Networks (RNNs), Time Series, and Sequence Data" of the series "Deep Learning - Recurrent Neural Networks with...
Curated Video
The Magic of Soap Bubbles: Science and Art Combined
Delve into the fascinating world of soap bubbles, where simple ingredients and scientific principles create stunning visual effects. Learn from experts at the Exploradome about why bubbles form, why they are always round, and the role of...