Material world Flashcards
(23 cards)
Particle theory
- all substances are made up of very small particles
- all substances consist of particles that can be similar or different
- there is space between the particles
- particles are constantly moving; speed depends on the temp. Of a substance
- particles either attract or repel. Strength of attraction or repulsion depends on the types of particles
Why does the air pressure in a tire increase when the tire becomes war?
The particles in matter are in constant motion. As the temp rises the particles move more rapidly
Solids
Particles held together by very strong bonds.
Particles can’t move around freely
Solids have a specific shape
Liquids
Bonds are weaker than those of a solid
Can move around slowly
Take the shape of its container
Gases
Bonds are weaker than those of a liquid
Move around much more freely
Large empty spaces between them
Law of conservation of mass
Mass of the reactants must equal the mass of the products
Sublimation
Solid to gas
Deposition
Gas to solid
Evaporation
Liquid to gas
Condensation
Gas to liquid
Malting
Solid to liquid
Freezing
Liquid to soli d
Density
Comparison between an objects mass and it’s volume
How do u find density?
Mass divide by volume
How do you find mass?
Density times volume
How do you find volume?
Mass divided by density
How do you find the volume of a liquid?
1- fill gc with the liquid
2- record amount
How do you find the volume of a regular solid?
Length x width x height
How do you find the volume of an irregular solid?
1- fill gc with water
2- drop object
3- Calculate difference
How do you find the mass of liquid?
1- put empty gc on scale
2- press zero
3- fill gc
4- record mass
Characteristic properties
Unique, more precise Ex: - boiling point - freezing point - melting point -conductivity - ph -density
Non characteristic properties
- Color
- mass
- volume
- temperature
- smell
Why is density a characteristic property?
It can be used to indentures a substance and it does not change.
