Geylang Methodist School Secondary 1 G2/G3 Science Class Work 3 PDF

Geylang Methodist School (Secondary) Secondary 1 G2/G3 Science Founded in 1924 Ch7: Model of Matter – The Particulate Nature of Matter Class Work 3 (optional for G2)...

Geylang Methodist School (Secondary) Secondary 1 G2/G3 Science Founded in 1924 Ch7: Model of Matter – The Particulate Nature of Matter Class Work 3 (optional for G2) Name: ___________________ ( ) Date: ____________ Class: __________ Changes of States evapouration condesation temperature temperature decreases increases melting freezing 1  solid liquid gas melting boiling Particles in a solid On heating, the particles The solid has melted to On heating, the The liquid has boiled to very closely packed gain are …………………………... gain energy and vibrate become a liquid. particles ………… energy become a gas. orderly more in an ………………. more vigorously. When the Particles in a liquid and move …………… Particles in a gas vibrate arrangement and …………… particles gain enough are closely packed ………………………….. vigorously. When the apart are ………………………….. disorderly gain enough disorderly about their fixed positions. energy, they overcome the in a …………………. particles ………. in a ………………………… very strong forces of slide arrangement and …………… energy, arrangement and attraction between them. past one another. overcome they ……………………. apart move …………. strong quickly The particles move faster the …………………. forces and ……………. and further apart from one of attraction between them. another. faster The particles move …………. further apart and …………………………… from one another. 2  gas liquid solid condensation freezing Particles in a gas On cooling, the particles lose The gas has condensed to On cooling, the The liquid has frozen to lose Far apart are ………………………….. energy and move slower. become a liquid. particles …………… energy become a sold. disorderly slower in a ………………………… As the particles lose energy, Particles in a liquid and move ……………….. Particles in a solid closely packed lose very closely packed arrangement and the forces of attraction are ………………………….. As the particles …….…. are …………………………... randomly move …………. between them become disorderly in a …………………. energy, the forces of in an orderly ………………. quickly slide vibrate and …………… stronger. arrangement and …………… attraction between them arrangement and …………… The particles move slower past one another. stronger become …………………….. about their fixed positions. and closer to one another. slower The particles move …………. closer and …………………………… to one another. 3