Solids, Liquids and Gases

Solids, Liquids and Gases

Why does water not freeze at the bottom of the lake?

Open Ended

Why does water not freeze at the bottom of the lake though the surface of the lake is frozen during cold winters?

Success Criteria

• Describe the arrangement and movement of particles in solid, liquid and gas

• Draw the arrangement of particles in solid, liquid and gas

• Explain the interconversion of states of matters in terms of kinetic particle theory and the energy changes involved

• Draw and interpret heating and cooling curve

How much do you know about water?

Part 1

Multiple Choice

What is the physical state of water at room temperature (25^oC)?

• solid

• liquid

• gas

Multiple Choice

What is the change in state when water boils?

• solid -> liquid

• liquid -> solid

• liquid -> gas

• gas -> liquid

Multiple Choice

The solid state of water is __________.

• ice

• steam

• water vapour

Multiple Choice

What is the effect of impurities on melting point of ice?

• no effect on melting point

• increase melting point of ice

• lower melting point of ice

Multiple Select

Which of the following are physical properties of steam?

• No fixed shape

• No fixed volume

• Cannot be compressed

• Cannot flow

• Low density

Physical properties of solids

> Fixed volume - cannot be compressed

> Fixed shape

> Cannot flow

> High density

Physical properties of liquids

> Fixed volume - cannot be compressed

> No fixed shape - takes the shape of the container it occupies

> Can flow

> High density

Physical properties of Gases

> No fixed volume - can be compressed

> No fixed shape - completely fill up and take the shape of their containers

> Can flow

> Low density

Open Ended

Solids have high densities and tend to sink when placed in water.

Ice is a solid but it floats when placed in water.

Suggest possible reasons to explain why ice floats on water.

Why does water not freeze at the bottom of the lake?

​https://phet.colorado.edu/en/simulations/states-of-matter

Let's pause, take a look at some simulations and complete your notes before the next segment of quiz.

What have you learnt about Kinetic Particle Theory?

Part 2

Multiple Select

Which of the following are physical properties of solids?

• Fixed volume

• Can be compressed

• Fixed shape

• Can flow

• High density

Multiple Choice

Which of the following explains why solids cannot flow?

• the particles cannot be compressed

• the particles are free to move randomly

• the particles can only vibrate about their fixed positions

Multiple Choice

Which state of matter does its particles have the most amount of energy?

• solid

• liquid

• gas

Multiple Choice

Which state of matter can be compressed and why?

• solid because the particles are very closely packed

• liquid because the particles are far apart

• gas because the particles are very far apart

Multiple Choice

Which diagram best represents the particles in a beaker of water?

Success Criteria

• Describe the arrangement and movement of particles in solid, liquid and gas

• Draw the arrangement of particles in solid, liquid and gas

• Explain the interconversion of states of matters in terms of kinetic particle theory and the energy changes involved

• Draw and interpret heating and cooling curve