Experiments
Experiment which shows solids do not take the shape of the container
Put a solid inside a container and see.
SIMPLE
Mention any 2 properties of Solids
Fixed Volume, Fixed Shape, Force of attraction is strong, diffusion rate is slow
What is a fluid?
A substance which is able to flow easily.
Experiment to represent liquids have fixed volume
Put some water in a bowl, measure its volume and then shift it to another bowl. You can see that volume doesn't change.
(For Ex. if it was 30ml in Bowl1 it will be 30ml in Bowl2 as well)
Among solids and liquids, force of attraction is stronger in ________________
Solids
What is force of attraction?
Attraction between molecules in any state of matter.
Experiment where solids diffuse into gases.
Incense stick or Naphthalene Balls
Kinetic energy is slower in solids. Why?
Because force of attraction between molecules of solids are stronger and they can move easily.
What is Kinetic Energy?
Amount of speed at which molecules travels.
Experiment where Gases diffuse into liquids
Carbon di oxide into our blood/cool drinks
Which state of matter has highest rate of diffusion and Why?
Gases because the force of attraction is low and hence particles have higher kinetic energy. Hence they can diffuse easily.
What is diffusion?
Movement of particles/molecules from one region to an other region. (From higher concentration region to lower concentration region)
An experiment/situation from daily life which shows gases can be compressed.
Pressing a piston/CNG(Compressed natural gas)/Oxygen Cylinders
Mention any 2 factors on which rate of diffusion depends on?
Temperature, Solubility, Mass of Molecules, Concentration of Molecules
We can't rejoin a broken chalk easily. Give reason
Because the force of attraction between molecules is broken. When we break a chalk it is a chemical change and it can't be taken back to the same form.