SNC1DChemistry: Atoms Elements and Compounds 2
Scientific Models
•The Particle Theory of Matter is an example of a scientific model.
•Models help scientists to picture processes in nature that cannot be seen simply or directly.
• A model is anything that allows us to better understand a concept. It may be something to look at or touch, but it doesn’t have to be.
•A model helps us understand how something works. Models may or may not be like the real thing such as a globe or a city map.
The Particle Theory of Matter
•All matter is made up of
•Each pure substance has its own kind of particle - different from particles of other pure substances.
• each other.
•Particles are .
•Particles at high temperature
Solids
•The particles in a solid . They are
•The particles are to each other.
•A solid .
•An example is an ice cube in a glass.
Liquids
•The particles in a liquid . The particles can slide past each other because they are less attracted to each other.
•Some particles flow more easily than others. The resistance to flow is called .
•Honey and molasses have high viscosity, whereas water has a low viscosity.
•A liquid .
•An example is pop in a can or juice in a glass.
Gases
•The particles in a gas are resulting in a lot of movement. They are not strongly attracted to each other and are very fast-moving.
•Due to the amount of space between particles,
Plasmas
•The fourth state of matter is plasma. , but is one of the most common states in the universe.
•Plasma has and cannot be contained by any object on our earth composed of ordinary matter.