Particle Behavior
State Changes
Heat Energy
Real-Life Examples
Vocabulary
100

What happens to particles in solids?

They vibrate in fixed positions.

100

What is melting?

The process where a solid turns into a liquid.

100

What happens when heat is added to ice?
 

It melts into water.

100

How does heat affect ice cubes in the sun?


They melt into water.

100

Define 'vibration' in relation to solids.

It is the rapid back-and-forth motion of particles in a solid.

200

How do particles behave in liquids?

They can slide past each other but are still close together.

200

What is freezing?
Answer: The process where a liquid turns into a solid.

The process where a liquid turns into a solid

200

How does cooling affect water?
 

It can freeze into ice.

200

Describe condensation in UAE.

Water droplets form on cold surfaces due to humid air cooling down.

200

What does 'expansion' mean?

The increase in volume of a substance due to heat.

300

Describe particle movement in gases.

They move freely and are far apart.

300

What is evaporation?

 

The process where a liquid turns into a gas.

300

What is heat loss?

The process where an object loses thermal energy

300

How does evaporation help in cooling?

It removes heat when water changes from liquid to gas, like sweating.

300

What does 'compression' refer to?

The reduction in volume of a substance when pressure is applied.

400

What is the effect of heat on solid particles?

They vibrate faster as they gain heat.

400

What is condensation?
 

The process where a gas turns into a liquid.

400

Explain heat gain.
 

The process where an object absorbs thermal energy.

400

Why do puddles dry up quickly in UAE?
 

High temperatures cause rapid evaporation.

400

Define 'particle spacing.'

The distance between particles in a substance.

500

Give a real-life example of particle behavior in a gas.

Air in a balloon expands when heated.

500

Compare melting and evaporation.
 

Both involve heat gain, but melting is solid to liquid, while evaporation is liquid to gas.

500

How do heat changes affect particle spacing?

Heat gain causes particles to move apart, while heat loss brings them closer together.

500

 Explain condensation in terms of everyday life.
 

It occurs when water vapor in the air cools and forms droplets, like on a cold drink.

500

What is 'thermal energy'?

The energy that comes from heat, related to the motion of particles.

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