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Chapter 3 matter. 3.1 : What is Matter? 3.2 : The States of Matter 3.3 : The Concept of Density 3.4 : The Properties of Matter & Their Application in Everyday Life. 3.1 – What is matter?.
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Chapter 3 matter 3.1 : What is Matter?3.2 : The States of Matter3.3 : The Concept of Density3.4 : The Properties of Matter & Their Application in Everyday Life
3.1 – What is matter? Matter is anything that has mass and occupies space.Thus, it includes(i) all LIVING THINGS(ii) all NON LIVING THINGS
3.1 – What is matter? It is said that HEAT and SOUND are examples of non-matter. Why? Since matter has mass, it will experience the pull of gravity.So, does matter has weight?
3.2 – states of matter Matter exists in three states :-(a) Solid(b) Liquid(c) Gaswhich can be changed from one another by heating or cooling
3.2 – states of matter According to kinetic theory of matter :-(a) matter consists of tiny and discrete particles,(b) the particles of matter are always in constant motion
Structure of matter Matter consists of tiny, discrete particles.That’s why the smell of the curry from the kitchen spreads throughout the air in the house.
arrangement of particles in matter Different states of matter have different arrangements of particles.
Empty space of particles in matter The empty spaces between the particles of matter influences the compactness of matter.(a) Gas can easily be compressed(b) Liquid is difficult to compress(c) Solid cannot be compressed
Movements of particles in matter • Slide over one another- Collide with • one another • Move freely • and randomly • Collide with • one another • frequently • Move freely • and randomly • at high speeds - Only vibrate and spin in their fixed position- Do not move freely
Movements of particles in matter Liquids and gases are therefore called fluid. Random movement is movement that does not follow any particular direction.These movements are known as the Brownian Motion
Movements of particles in matter Brownian motion can be observed in :-(a) a smoke cell under a microscope(b) movements of pollens floating on water – the pollens are moving randomly due to collisions with the water particles