Chemistry Flashcards
(77 cards)
What is matter and what makes up matter?
Matter is a physical object/thing that takes up space. Matter is made out of molecules and atoms.
Evaporation
The process of turning liquid into a vapour or gas.
Vapour
A substance suspended in the air (normally liquid droplets in the air.)
Fumes
Gases or vapour with a strong smell or is dangerous to inhale.
Boiling
At or near boiling point
Condensation
Water collects on a cold surface when humid air comes in contact with it.
Melting
Make or become liquified by heating
Freezing
Below 0°c - when liquids turn to solids
Sublimation
When anything solid turns into a gas without belting first Eg. Snow turns into steam without melting first
Volatile
When substances easily evaporate in normal temperatures
Solidification
To make something solid
Deposition
Changing from a gas into a solid
Particle density: solid
Particles are closely packed together
Particle density: liquid
Looser density that tend to move freely but still kind of close together
Particle density: gases
Move completely randomly in the space
What did Archimedes find out?
The amount of water displaced is equal to the volume of the object
Melting and boiling point
The temperature at which the substance melts and boils.
Strength
- Tensile strength is the force needed to break a stretched piece of wire
- Compressional strength is the measure a substance can stand before it is crushed
Hardness
The ability for a substance to scratch another substance
- The harder the substance the greater the force holding the particles together.
- The harder the substance the higher the melting point
Viscosity
The thickness or “gooiness” of a liquid
Conductivity
How easily something can move through something
Electrical conductivity
How well electrical current flows through a substance
Thermal conductivity
How well heat flows through a substance
Refractive index
The measure of how light bends through a substance