click below
click below
Normal Size Small Size show me how
Ch 2 Matter
Beaver Local 2
Question | Answer |
---|---|
Anything that has mass and takes up space | Matter |
Every sample of "this" is either an element, a compound, or a mixture | Matter |
A substance that CANNOT be broken down into simpler substances by chemical means, such as carbon, hydrogen, oxygen | Element |
The smallest unit of an element that keeps the element's chemical properties | Atom |
A smallest unit of a substance that behaves like the substance | Molecule |
A substance made up of atoms of different elements (2 or more elements that are chemically combined) | Compound |
Matter that has a fixed composition and definite properties | Pure Substance |
A combination of substances that are NOT chemically combined (can be physically separated) | Mixture |
The substances in this type of mixture are NOT evenly distributed | Heterogeneous Mixture |
The components in this type of mixture ARE evenly distributed | Homogeneous Mixture |
Mixtures that ARE able to be mixed | Miscible |
Mixtures that DO NOT mix well (oil and water) | Immiscible |
Characteristics that can be observed without changing the identity of the substance | Physical Properties |
The temperature at which a substance changes from a solid to a liquid | Melting Point |
The temperature at which a liquid changes to a gas | Boiling Point |
A measurement of how much matter is contained in a certain volume of substance; also a physical property | Density |
mass/volume | Formula for Density (D= m/v) |
The capability of a substance to combine chemically with another substance | Reactivity |
Description of how a substance changes into a new substance eith by combining with other elements or breaking apart into new substances | Chemical Properties |
The ability to burn (chemical property) | Flammability |
This change affects one or more physical properties of a substance without changing the identity of the substance | Physical Change |
A change that happens when one or more substances are changed into entirely new substances that have different properties | Chemical Change |
True or False: A mixture can be separated by physical changes | True |
True or False: A compound must be broken down by chemical changes | True |