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Chemistry test 1

Chapter 1 and 2 chemistry test

Chemistry The composition of matter and the changes matter undergoes.
Matter Anything that takes up space and has mass.
Volume The space and object occupies.
Qualitative Observation made without measuring.
Quantitative Observation made with measuring.
Law Explains what happens.
Theory Explains why things happen, well tested, but may change with new technology or future experiments.
Property Used to describe matter; how it appears, behaves, changes or reacts.
States of matter Gas, liquid,and solid.
Volatile A substance that easily changes from a liquid to a gas at room temperature; gasoline.
Density The amount of matter contained in a given volume.
Physical changes include Hardness, color, conductivity, melting point, and boiling point, magnetic, state, density.
Examples of physical changes are these Boil, freeze, melt, condense, break, cut, and crush.
Chemical change A change in the identity of a substance. The change of one or more substances into new substances.
Chemical properties Burn, rot, rust, decompose, explode, corrode.
A chemical reaction has happened if you see A gas,a precipitate,color change, a temperature, or a change in the surface of the substance.
Reactant The substance present at the start.
Product The substance produced.
Substance Pure matter that contains the same composition and properties.
Mixture A substance consisting of two or more substances mixed together without any chemical bonding between them.
Heterogeneous Composed of unrelated or differing parts or elements.
Homogeneous Composed of parts or elements that are all of the same kind.
Solute Substance that is dissolved.
Solvent The substance that does the dissolving.
Alloy A solid solution of different metal substances.
Element A pure substance that cannot be broken down into simpler substances; one type of atom.
Compound Pure substance made up of two or more elements together in fixed proportions.
Law of conservation of mass In a chemical reaction, matter is neither created nor destroyed.
Exothermic Reaction in which energy is given off (fire; tear down).
Endothermic Reaction in which energy is absorbed (photosynthesis).
Atom The smallest quantity of an element that can take part in chemical reaction, individual particles.
Molecule Two or more atoms bonded together.
Compound One type of molecule with two or more different atoms.
Solid Matter with a definite shape and volume.
Created by: sheeba1cindy



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