Particle Model and States of Matter

if you look at objects around your house or in your school you'll be able to see that there are objects in different states of matter some of the objects will be solid some will be liquids and others will be gases by simply boiling some water in kettle we can see all the three states of matter the kettle itself made from metal glass and plastic is solid object inside we have liquid water and when that water boils you will also see the water vapor that comes off which is an example of gas in this video we're going to look at more detail as to how the particles are arranged in solids liquids and gases here is the particle diagram for solid liquid and gas for example the solid could represent the particles arranged in block of ice the liquid would represent the particles arranged in water and the gas would represent the particles arranged in water vapor depending on the temperature substance might either be solid liquid or gas at one particular time in solids the particles are in fixed positions in regular arrangement in their fixed positions the particles vibrate and there are strong forces between the particles solids have definite shape in liquids the particles are close together but can move over each other they have an irregular arrangement the past calls move randomly and there are weak forces between the particles liquids have no definite shape they take the shape of whatever container they are in in gases the particles are far apart the particles move randomly and there are very weak forces between the particles gases like liquids have no definite shape and they take the shape of whatever container they are in here's quick demo to show what mean when say that solids have definite shape but liquids and gases do not solids have definite shake if put the solids into the container they will stay the same shape as before they will not take the shape of the container if now pour the liquid into the container like gases liquids have no definite shape so instead the liquid will fill the container and it will take the shape of the container itself by increasing or decreasing the temperature of substance you can change its state of matter for example you could change from solid to liquid by melting you could change from liquid to gas by boiling if you cooled down substance you could go from gas to liquid by condensing or you could go from liquid to solid by freezing and final change of state that you can do is to go straight from solid to gas and we call this sublimation we're going to look at changing state in the next video hi guys if you enjoyed that last video then please click on the screen to subscribe you can also find all my videos in one place at GCSE revision monkey comm if your teacher check out the key state 3 package at Science surgery comm it contains all of the revision monkey videos as well as loads more Key Stage 3 resources