SCIENCE - STATES OF MATTER
SUBLIMATION
A change directly from the solid to the gaseous state without becoming liquid Example: Dry ice
MOLECULE
A group of atoms bonded together
DENSITY
A measure of how much mass is contained in a given volume. Generally, solids are more dense than liquids because their molecules are closer together.
MASS
A measure of the amount of matter in an object
ELEMENTS
A molecule composed of one kind of atom; cannot be broken into simpler units by chemical reactions.
GAS
A state of matter with no definite shape or volume
MATTER
Anything that has mass and takes up space. It is everything around you.
CHANGING STATE (PHASE TRANSITIONS)
By adding heat or taking it away, makes matter either a solid, liquid or gas. For example; water is a substance that can be found in three states.. Solid Ice, Liquid water, and water vapor.
SPEED OF DIFFUSION
Can be increased by increasing the difference in concentration (concentration gradient) , by increasing temperature (particles will move faster thus diffusing faster). and the diameter of the molecules (smaller molecules diffuse faster).
DEPOSITION
Change from a gas directly to a solid Example: Water vapor to ice (frost)
PHASE CHANGES
Changes that require energy includes melting, sublimation and vaporization; these changes that release energy include condensation, deposition and freezing.
PERIODIC TABLE
Chart used to organize all known elements
PRESSURE
Force per unit area on a surface
HYDROGEN
Is the lightest of all gases, occurring chiefly in combination with oxygen in water; exists also in acids, bases, alcohols, petroleum, and other hydrocarbons.
DIFFUSION
Movement of molecules from high to low concentration
OXYGEN
Oxygen is the eighth element of the periodic table. O2
WATER PARTICLES
Precipitation
ATOM
Smallest particle of an element
CONDENSATION
The change from a gas to a liquid
EVAPORATION
The change of a substance from a liquid to a gas
HYDROGEN
The first and simplest element on the periodic table. It is one of the most common elements in the galaxy.
BOILING
The temperature at which a liquid changes to a gas
MELTING POINT
The temperature at which a solid becomes a liquid
PARTICLES
Very small pieces of solid or liquid matter.
CARBON DIOXIDE
a heavy odorless colorless gas formed during respiration and by the decomposition of organic substances CO₂
PHASE
a stage in a series of changes
FREEZING
change from liquid to solid
STATES OF MATTER
solid, liquid, gas
SOLID, LIQUID, GAS
states of matter (common)
MELTING
the change in state from a solid to a liquid
SOLID
the state of matter with a definite volume and definite shape
LIQUID
the state of matter with a definite volume but no definite shape
