Particle Arrangement in Phases of Matter
What do you already know about the different phases of matter?
Lesson duration is: 40 minItems in this lesson
What do you already know about the different phases of matter?
Particle Movement in Liquids
Particles in liquids can move and slide past one another due to their close but non-fixed arrangement.
Particle Arrangement in Solids
Particles are tightly packed in a fixed arrangement and can only vibrate.
Learning Objectives
At the end of the lesson, you will be able to describe the particle arrangement in solids, liquids, and gases. At the end of the lesson, you will understand the differences in particle movement among the three phases of matter.
Particle Arrangement in Liquids
Particles in liquids are close together without a fixed arrangement, allowing them to move and slide past one another.
Particle Movement in Solids
Particles in solids can only vibrate due to their tightly packed arrangement.
Particle Arrangement in Gases
Particles in gases are free-floating, moving and colliding freely without any distinct arrangement.
Particle Movement in Gases
Particles in gases are free-floating and move and collide with each other without any distinct arrangement.
Summary
Understanding the different particle arrangements and movements in solids, liquids, and gases is essential for comprehending the behavior of each phase of matter.
In which state of matter do the particles have the most freedom of movement?
Solid
Gas
Liquid
Plasma
What is the arrangement of particles in a solid?
Closely packed in a regular structure
Loosely spaced
Randomly scattered
Moving freely
How do particles move in a liquid?
They vibrate in fixed positions
They can move past each other
They have no movement
They are tightly packed
What happens to the arrangement of particles in a gas?
They form a regular structure
They become tightly packed
They are far apart and randomly arranged
They lose their kinetic energy
Definition List
Solids: A phase of matter where particles are tightly packed in a fixed arrangement and can only vibrate.
Liquids: A phase of matter where particles are close together without a fixed arrangement, allowing them to move and slide past one another.
Gases: A phase of matter where particles are free-floating and move and collide with each other without any distinct arrangement.
Energy and matter
When you add or remove energy to a substance, element, object, it can change the properties of that substance/element/object
When you freeze something, you are loosing energy, the particles slow down and they eventually form into a solid (not all substances do this), for example water when frozen becomes ice
When you are adding energy to something you are causing the particles to move faster causing them to move quickly and therefore changing their state, for example, boiling water causes the water molecules to turn into a gas
Heating and cooling
When we are adding energy to something, usually we are using thermal energy
This thermal energy is what causes the bonds between the particles to break and therefore causes them to vibrate more quickly and moving faster around the room
This is what happens when we are melting or boiling something
This is called a change of state - solid, turning to liquid, liquid to gas
All substances have a specific temperature at which they change state
What causes a substance to change from a solid to a liquid?
Addition of air
Increase in pressure
Decrease in temperature
Increase in temperature
What causes a substance to change from a liquid to a gas?
Increase in pressure
Increase in temperature
Subtraction of light
Decrease in temperature
What causes a substance to change from a gas to a liquid?
Increase in temperature
Decrease in pressure
Addition of electricity
Decrease in temperature
What causes a substance to change from a liquid to a solid?
Subtraction of heat
Decrease in temperature
Increase in temperature
Increase in pressure
What causes a substance to change from a solid to a gas?
Addition of water
Increase in temperature and pressure
Increase in pressure
Decrease in temperature
True or False: Solids melt when heated.
False
True
What is the boiling point of water in Celsius?
50 degrees
200 degrees
100 degrees
150 degrees
Do liquids freeze at a specific temperature?
No
Yes
True or False: Gases condense when heated.
True
False
What happens to a gas when it is cooled down?
It condenses
It boils
It freezes
It evaporates
In which phase of matter are particles tightly packed in a fixed arrangement?
Gas
Liquid
Plasma
Solid
Which phase of matter allows particles to move and slide past one another?
Liquid
Gas
Plasma
Solid
In which phase of matter do particles move and collide without any distinct arrangement?
Liquid
Gas
Plasma
Solid
Which phase of matter has free-floating particles?
Liquid
Solid
Plasma
Gas
In which phase of matter are particles close together without a fixed arrangement?
Plasma
Solid
Liquid
Gas
Definition List
Solids: A phase of matter where particles are tightly packed in a fixed arrangement and can only vibrate.
Liquids: A phase of matter where particles are close together without a fixed arrangement, allowing them to move and slide past one another.
Gases: A phase of matter where particles are free-floating and move and collide with each other without any distinct arrangement.
What new information about changes of state do you know?
Have your answers changed since the start of the lesson?
Write down 3 things you learned in this lesson.
Write down 2 things you want to know more about.
Ask 1 question about something you haven't quite understood yet.
