Science quiz

Precipitate

Solid that forms and settles out of a liquid mixture.

Product

Substance produced in a chemical reaction.

Reactant

Substance present at the start of a reaction.

Compound

Substance that contains two or more elements chemically combined in a fixed proportion.

Chemical reaction

Change in which one or more reactions change into products, involving the breaking of bonds in reactants and the formation of bonds in products.

Chemical property

Ability of a substance to undergo a specific chemical change.

Group

Vertical column of elements in the periodic table.

Period

Horizontal row of elements in the periodic table.

Law of conservation of mass

Any chemical or physical process, energy is neither created nor destroyed.

Periodic table

Arrangement of elements in which the elements are separated into groups based on a set of repeating properties.

Chemical symbol

One or two letter representation of an element.

Chemical change

Change that produces matter with a different composition than the original matter.

Element

Simplest form of matter that has a unique set of properties and cannot be broken down into simpler substances by chemical means.

Distillation

Process used to separate components of a mixture, using differences in boiling points.

Filtration

Process that separates a solid from the liquid in a heterogeneous mixture.

Phase

Any part of a sample with uniform composition and properties.

Solution

Homogeneous mixture consisting of solute dissolved in a solvent.

Heterogeneous mixture

Mixture that is not uniform in composition; components are not evenly distributed throughout the mixture.

Mixture

Physical blend of two or more substances that are not chemically combined.

Physical change

Change during which some properties of a material change, but the composition of the material doesn’t.

Vapor

Describes the gaseous state of a substance that is generally a liquid or solid at room temperature.

Gas

Form of matter that takes the shape and volume of its container; has no definite shape or volume.

Liquid

Form of matter that flows; has a fixed volume and an indefinite shape.

Solid

Form of matter that has a definite shape and volume.

Physical property

Quality or condition of a substance that can be observed or measured without changing the substance's composition.

Substance

Matter that has a uniform and definite composition.

Intensive property

Property that depends on the type of matter in a sample.

Extensive property

Property that depends on the amount of matter in a sample.

Volume

Measure of space occupied by a sample of matter.

Homogeneous mixture

A mixture that is uniform in composition; components are evenly distributed.

Mass

Measure of the amount of matter that an object contains.