Chapter 15 Vocab Cards
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chemical change
A change of one substance to another. Pg. 462
chemical property
A characteristic of a substance that indicates whether it can undergo a certain chemical change. Pg. 461
colloid
A type of mixture with particles that are larger than those in solutions but not heavy enough to settle out. Pg. 454
compound
A substance in which the atoms of two or more elements are combined in a fixed proportion. Pg. 452
distillation
The process for separating substances in a mixture by evaporating a liquid and recondensing its vapor. Pg. 461
heterogeneous mixture
A mixture in which different materials can be distinguished easily. Pg. 453
homogeneous mixture
Contains two or more gaseous, liquid, or solid substances blended evenly throughout. Pg. 454
law of conservation of mass
The mass of all substances that are present before a chemical change equals the mass of all the substances that remain after the change. Pg. 465
physical property
Any characteristic of a material that you can observe without changing the identity of the substances that make up the material. Pg. 458
solution
A homogeneous mixture of particles so small that they cannot be seen with a microscope and will never settle to the bottom of their container. Pg. 454
substance
A type of matter with a fixed composition. Pg. 450
suspension
A heterogeneous mixture containing a liquid in which visible particles settle. Pg. 456
Tyndall effect
The scattering of light by colloidal particles. Pg. 455
element
If all the atoms in a substance have the same identity, that substance is a(n) … Pg. 450
physical change
A change in size, shape, or state of matter. Pg. 460