Everything
Two or more substances mixed together but not chemically bonded
What are molecules
A pure substance that cannot be broken down into a simpler substance and contains only one type of atom
What is an element?
A homogeneous mixture made by dissolving one substance in another
What is a solution
The state of matter in which a substance has a definite volume
A reversible physical change that occurs when a substance changes from one state of matter to another
What is a phase change?
Matter that can not be separated into any other substance and always has exactly the same composition is classified as
a pure substance
Salty water is considered a ______.
What is a mixture?
The substance in a solution in which the solute dissolves is called
What is solvent
The ability of a substance to allow heat to flow through it is called
What is conductivity
A change from a solid directly to a gas
What is sublimation
99% of all matter in the universe is in the ________ state.
What is plasma?
Sugar is made of three elements joined in a fixed proportion. Sugar is an example of a _________.
What is a compound?
When parts of a mixture are noticeably different from one another the mixture is classified as
What is heterogenous?
What is the formula for density?
What is Density = mass/volume
What are the three ways you can identify a chemical change?
A change in color, production of gas and formation of a solid.
Anything that has mass and takes up space
What is Matter
The smallest chemical unit of an element
What is an atom
When a mixture appears to contain only one type of substance because the substances are so evenly distributed that it is hard to distinguish one substance from another it is called... Example Sweet Tea
What is homogeneous
The state of matter in which a substance has a definite shape and a definite volume
What is a solid?
Are the following physical properties or chemical properties:
Flammability and Reactivity
What are chemical properties?
The state of matter with no definite shape or definite volume
What is a gas?
A pure substance that contains two or more elements chemically joined in a fixed proportion
What is a compound
The substance that dissolves in a mixture is called...
What is a solute?
The natural movement within gases and liquids that spreads out particles from an area of higher concentration to an area of lower concentration
What is diffusion?
Name three physical properties
What are malleability, hardness, viscosity, melting and boiling points, density, conductivity, and appearance and odor?