V

 Vacuum     A completely empty space. The collapsing can experiment shows the effect of the pressure of gas particles. The gas particles on the inside of the can are removed, leaving a vacuum. The pressure of the particles on the outside squash the can.

A common mistake is to think that the vacuum sucks the can inwards.

Variable     A factor that can be changed in an experiment. There are different ways to describe variables and these are important for "How Science Works".

Discrete variable:     Only whole numbers are possible (such as how many layers of insulation).
The values are steps.

Continuous variable:     Any number is possible (such as the thickness of insulation).
The values are gradual.

Categoric variable:     A description is used to identify the variable (such as cork insulation or polystyrene)

Independent variable:     The variable that is adjusted to change the conditions of the experiment so that we can find out the value of the dependent variable.

Dependent variable:     The one we find out about. Its value depends on the value of the variable that we adjust.

Fixed variable:     A factor that could have been changed but we decided to hold constant in order to make the experiment a fair test.

Vibration     Solids are made of particles that are vibrating. The particles are fixed in position but can wriggle about.  

MORE WORDS AND DEFINITIONS WILL BE ADDED.

IF THERE IS SOMETHING YOU WOULD LIKE TO SEE HERE, LET US KNOW.

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