State of matter 2

• Science
• Secondary Education

RECAP 1: What are the states or matter?

RECAP 2: How are the arrangement of particles for each matter?

Change of state

Materials changes state all the time around us

The state of substance depends on the environment that surrounds and affect it

how matter change it's state?

Name a few examples where changes of state of matter occur

Can you name a few process that cause change of state to happen

Melting and boiling point

Melting point is the temperature at which solid changes state to become liquid

Boiling point is temperature at which it changes state from liquid to gas

Melting point is the same as freezing point

Agree

Disagree

Can you see why?

Evaporation

Liquids can change to gases below their boiling point

During evaporation, liquid absorbs energy from the surrounding which cool down

Think about the feeling of alcohol on your skin

Do you feel cooler after you sweating during exercise?

Evaporation

Water evaporate becomes liquid causing high humidity in the air

Low humidity causes dry skin and breathing problems

Condensation

Water vapour condense to form liquid, usually in form of droplets

When is the last time you encounter the event of condensation?

Condensation may causes mould on clothes and rotting of wood

Sublimation

Substance sometimes skip a phase when change of phase happens

Example: gas to solid or solid to gas

Have you seem the process of sublimation?

What happen to the particles during change of state?

SIMULATION

https://phet.colorado.edu/sims/html/states-of-matter-basics/latest/states-of-matter-basics_en.html

Let's test your understanding!

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