Rain is essential to our planet. Without it, all life on Earth would struggle to survive. How do rain clouds form and what determines whether it rains or not? Earth Science - Weather - Learning Points. Rainfall comes from the clouds...

We investigate the conditions needed for rust to form. Four iron nails are placed under different conditions. One is half submerged in water. Another is completely submerged in boiled water. One is half submerged in salt water. The final...

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...

We use a disposable nappy to examine the superabsorbent properties of hydrogels. We add water to grains of hydrogel and watch them swell before adding salt to see the water escape. Chemistry - Chemical Industries - Learning Points....

A blizzard creates a blanket of snow. Look closer and the true beauty of individual snowflakes can be seen. How are different shapes of snowflakes formed and why are they always perfectly symmetrical? Chemistry - Atoms And Bonding -...

Salt is routinely used to melt snow and ice on winter roads. But what is happening at the molecular level to cause this helpful change of state? Chemistry - Atoms And Bonding - Learning Points. When salt is added to water it lowers the...

Molecules such as sugar and starch, which form an important energy source for living organisms. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig...

A fascinating example of a solid behaving as a liquid.
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Material processes - Solids, liquids and
g

ases - Solids />

Learning Points
Liquefaction causes solid soil to take
o

n some...

Learn how to find out the difference between tap water and spring water.
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Material processes - Separating mixtures - Separation
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Learning Points
Evaporation c
a

n be used to...

By the end of this learning object, the student will be able to: Recognize the concept of heat of fusion and vaporization16331

Dr. Forrester explains the uses for the mineral salt.

Dr. Forrester explains how different forms of matter can exist in different states.

Yes, water expands when it freezes. Note that the word “expands” here indicates an increase in volume. So, a technically sound way to put it would be—water’s volume increases when it freezes. This statement is accurate, and you can test...

This video covers:

- How microwaves are used to heat
food
- How microwaves are used in satellite comm
unication
- The idea that hotter objects emit more inf
rared radiation
- How we use infrared radia

tion...

In this video, we cover:

- What osmos
is is
- How osmo
sis works
- How to understand wate

r concentration


Exam board specific info:r/>AQA - Suitable for everyone
IGC
SE Edexcel - Suitable for every
one...

With various environments better understood, it's now time to look at specific types of organisms. Let's start with plants, also known as flora. We learned about these in the botany series, but now let's contextualize some of that...

Thermostatic radiator traps are used in steam heating systems. They are installed in 2 pipe steam heating systems, to prevent steam passing through and returning to the boiler. We cover the basics of a steam heating system, the boiler,...

Steam heating system basics. Learn the basics of how steam heating systems work and where steam heating systems are used.<br/>

This video is answering the question of what is ice.

We've all heard the terms acid and base. What do these mean? Don't just tell me about pH, silly. What structural detail makes a molecule an acid or a base? You don't know? Well, you'd better watch this then. You don't want to be...

This video explains why the ocean appears blue. It is because the water molecules in the ocean absorb all colors except for blue, which is reflected back to our eyes. As we go deeper into the ocean, the red part of the spectrum is...

Ion Channel Selectivity K+ Channel

Some ionic compounds are coordinated to a specific number of water molecules in solution. But how many? How can we find out? We can't see molecules! Whatever will we do? Something very clever, as it turns out. Take a look!

In this video, the concept of transport of substances into and out of cells is explained. The different ways in which this process occurs are discussed, including diffusion, osmosis, and active transport. The importance of surface area...