Ch 9 what is matter made of... by Mrs O' Hehir https://padlet.com/vohehir/lit45i5u4tjb Resources for Ch 9 what is matter made of... en-us 2017-12-06 17:33:21 UTC 2023-01-22 10:22:53 UTC hello@padlet.com https://padlet-assets.s3.amazonaws.com/icons/Planets.png A Closer Look: Chemical Vs. Physical Change vohehir https://padlet.com/vohehir/lit45i5u4tjb/wish/213819585 2017-12-06 17:34:52 UTC https://padlet.com/vohehir/lit45i5u4tjb/wish/213819585 vohehir https://padlet.com/vohehir/lit45i5u4tjb/wish/213822717 2017-12-06 17:40:09 UTC https://padlet.com/vohehir/lit45i5u4tjb/wish/213822717 Particle Theory of Matter The particle theory of matter states that all matter is made up of tiny particles, specifically atoms and molecules, and that these particles have inherent characteristics. A major part of the theory is the belief that all particles in a single pure substance are the same and are different from particles of other substances. vohehir https://padlet.com/vohehir/lit45i5u4tjb/wish/213826150 2017-12-06 17:46:32 UTC https://padlet.com/vohehir/lit45i5u4tjb/wish/213826150 vohehir https://padlet.com/vohehir/lit45i5u4tjb/wish/213827984 2017-12-06 17:50:18 UTC https://padlet.com/vohehir/lit45i5u4tjb/wish/213827984 Diffusion vohehir https://padlet.com/vohehir/lit45i5u4tjb/wish/213828998 Diffusion is the movement of particles from a high concentration to a low concentration.]]> 2017-12-06 17:52:32 UTC https://padlet.com/vohehir/lit45i5u4tjb/wish/213828998 Diagram - Lennard vohehir https://padlet.com/vohehir/lit45i5u4tjb/wish/213829140 This diagram shows a practical that could be used to explain diffusion]]> 2017-12-06 17:52:48 UTC https://padlet.com/vohehir/lit45i5u4tjb/wish/213829140 Diffusion and Temperature (experiment) vohehir https://padlet.com/vohehir/lit45i5u4tjb/wish/213829356 This experiment shows how time taken for food colouring to diffuse in cold vs. hot water differs!
The outcome is clear:  The diffusion of the ink in hot water takes a lot less time! 
This is because the particles of the hot water  have more energy than the ones of the cold water. Molecules move faster when they are heated. The rate of diffusion will increase with the temperature going up.]]> 2017-12-06 17:53:14 UTC https://padlet.com/vohehir/lit45i5u4tjb/wish/213829356 What may affect the rate of diffusion vohehir https://padlet.com/vohehir/lit45i5u4tjb/wish/213829401 There are three main factors to be considered:
1.)  Size of molecules: larger molecules diffuse slower than bigger ones (also it takes more energy/ heat to move bigger molecules)
2.) Temperature: see linked experiment in my other post
3.) The distance between the molecules: it takes longer for a particle to diffuse if it is further away from the point of diffusion than it does for one that is close.]]> 2017-12-06 17:53:21 UTC https://padlet.com/vohehir/lit45i5u4tjb/wish/213829401 vohehir https://padlet.com/vohehir/lit45i5u4tjb/wish/213829861 Solids have a definite shape, volume and cannot be compressed and the molecules are tightly packed.
Liquids have no definite shape, but has a definite volume and cannot be compressed. The molecules in liquids are less packed than that in a solid. Gases have no definite shape or volume, and can be compressed. The molecules are not packed and are randomly arranged.]]> 2017-12-06 17:54:17 UTC https://padlet.com/vohehir/lit45i5u4tjb/wish/213829861 An example of a chemical change rusting iron, combustion burning of wood, souring milk and metabolism of food.  vohehir https://padlet.com/vohehir/lit45i5u4tjb/wish/213830845 2017-12-06 17:56:21 UTC https://padlet.com/vohehir/lit45i5u4tjb/wish/213830845 Condensation Point vohehir https://padlet.com/vohehir/lit45i5u4tjb/wish/213831139 The temperature at which a material changes from a gas to a liquid; the same as the boiling point]]> 2017-12-06 17:56:55 UTC https://padlet.com/vohehir/lit45i5u4tjb/wish/213831139 vohehir https://padlet.com/vohehir/lit45i5u4tjb/wish/214244923 2017-12-07 17:53:10 UTC https://padlet.com/vohehir/lit45i5u4tjb/wish/214244923