Solids, liquids and gases Flashcards
1
Q
How can the different properties of solids, liquids and gases be explained?
A
They can be explained using the particle theory
2
Q
What does the particle theory state?
A
- All matter is made up of tiny particles.
- The particles are moving all the time.
- There are forces of attraction holding the particles together.
- The particles vary in strength according to the different states of matter. [solids>liquids>gases]
3
Q
What is the volume of an object?
A
It is the amount of space the object takes up
4
Q
How can the volume be measured?
A
cubic centimeters (cm³)
5
Q
What are the properties of solids?
A
- Solids are made up of particles that are close together(held by strong forces of attraction)
- Solids do not flow
- The shape of solids does not change easily
- The particles can not move over each other but they vibrate in a fixed position.
6
Q
What are the properties liquids?
A
- Liquids can not be compressed easily
- Liquids are made up of particles that are barely to each other (held by strong forces of attraction)
- Liquids have a fixed volume BUT there shape can change to fit the container they are put in.
- The particles in a liquid move past each other
7
Q
What are the properties of Gases?
A
- Gases can be compressed easily into a smaller volume.
- The particles are far away from each other.
- The shape and the volume of gases can change as they flow easily and spread out.
- The forces of attraction between the particles are weak, so the particles in gases move freely
8
Q
What is density?
A
It is the mass of a certain volume of material
9
Q
How is Density measured?
A
- kilograms per cubic meter (kg/m³)
- grams per cubic centimeter (g/cm³)
10
Q
How can the density of gases be changed?
A
By squashing them
11
Q
What happens when we compress a gas?
A
The density will increase, the volume will decrease and the mass stays the same
