Remember, as a member of the Science Bus Club you can ‘Ask Albert’ a question about any of the topics. So if you’re not already a member join today!!
Some Useful Words For You To Remember
Dissolved – when a substance disappears in a liquid
Undissolved – when a substance will not disappear
Solution – the product when a substance is dissolved
Mixture – when two or more substances are mixed together
Evaporate – when a liquid changes to a gas
Condense – when a gas changes to a liquid
Pure – a pure substance has no other substances in it
Filtering – a method of separating undissolved solids from a liquid
Different Types Of Water
Here are four types of water:
Tap water- Sea water
- Distilled water
- Cleaned puddle water
Which is the only one to have no other substance in it?
The answer is, of course, distilled water!! Can you explain why?
Substances dissolve quicker because of different reasons.
- The size of the particles
- Heat
- Stirring
- The volume of water that they are dissolved in
Dissolving Substances In Water
What happens when something dissolves?
When a solid, for example, salt is dissolved into water. It actually seems to disappear into the liquid!! However we know that the dissolved solid did not really disappear, it still exists even though you can no longer see the salt crystals.
So where did they go?
They were broken apart into tiny particles which are much too small to see - even with a microscope!
What's the Difference between "Dissolving" and "Melting"?
When a solid dissolves into a liquid it does not melt as no heat has to be added. It does not change phase, but simply gets broken apart into invisible pieces that are mixed into the liquid. In order to melt a solid, heat must be added to raise its temperature above its melting point and no other substance is added.
Did you know that if you add instant coffee to water it dissolves?
A Cool Link
Click on the link below to find out lots more.
Have fun!!!
Remember, as a member of the Science Bus Club you can ‘Ask Albert’ a question about any of the topics. So if you’re not already a member join today!!
