Chapter seven!

FIRST POST YAY!

GOOD MORNING CLASS.
TODAY MISS YAP IS GOING TO TEACH YOU ABOUT THERMAL PHYSICS
TURN TO TEXTBOOK PAGE 121!
YES! so let's begin with the properties!

Let me question you!
WHAT ARE THE PROPERTIES OF SOLIDS?!

*smart student raises hands and says*
WO ZHI DAO! Solid are hard and rigid, which requires a large force to change it's shape.
They are incompressible, has high density, has a fixed shape and volume. Cool huh!

BU CUO BU CUO! next question!
WHAT ARE THE PROPERTIES OF LIQUIDS?!

*nerdy kids raises hands and says*
errrr liquid are incompressible, has a fixed vloume and has high density. Unlike solids, it does not have a fixed shape.

Hmm, good! last question!
WHAT ARE THE PROPERTIES OF GASES?!

*bimbo students stands up and say*
Aiyoh, cher! This question so easy! Gas ah, are very different from liquid and solid. It is easily compressible, that has low density with no fixed shape or volume. They are compressible as we can't even touch, see or feel them. See i so smart!

HAHA wow, smart teacher produces smart students!
okay, i was talking to myself just now, how lame.
WELL WELL,These are the properties that we have learnt before.
Now, let me explain the above stuffs in detail!

solids :D

So why do solids have high densities? Well apparently, the particles of a solid is closely packed together in a regular pattern that occupies minimum space, resulting in high densities.

Solids have fixed volume and shapes. Have you ever wondered why? Actually, particles vibrate about in fixed positions only. It is held in position by very STRONG intermolecular bonds. This explains the reason why solids have fixed volume and shapes.

liquids :D

Liquids also have high densities. They are randomly arranged with the particles slightly further apart as compared to solids.

Liquids have fixed volumes, but they do not have fixed shape. Why is it so?
Well, liquids are free to move about but are confined within the vessel that contains it. It also have attractive forces between the particles. That explains the question :D

Gases :D

Gases has low densities. That is because they are very very far apart. Particles are randomly arranged and will occupy any available spaces

Gases are also easily compressible. They have no fixed volume and shape because the particles have very little attraction between them and it will move about randomly at very high speeds!

Brownian motion!
Yes yes, it is a motion of smoke particles.
At a higher temperature, smoke particles will be more vigorous, because air molecules are bombarding the smoke particles more frequently.
This means that air molecules have greater speeds at higher temperatures.
When temperature increases, thermal energy will be converted to kinetic energy, hence causing molecules to move faster!

To conclude the chapter,
I have found useful notes on this chapter!
if you want, you can try and do it yeah?

http://www.ailwyn.schoolzone.co.uk/science%20website%20internet/hwk7g.pdf

Have fun doing it!