Worksheet

matter
states (of matter)
homogeneous mixture
heterogeneous mixture
solution
pure substance
physical change
distillation
filtration
chromatography
paper chromatography
compound
chemical change
element

Classification of Matter

Liquid, solid, liquid ,gas, volume, shape gas

1) Matter exists in three states:______, ________, and_______. A solid is rigid; it has a fixed_________ and_________. A _________has a definite volume but no specific shape; it assumes the shape of its container. A_________ has no fixed volume or shape; it takes on the shape and volume of its container

Mixtures, variable composition, homogeneous, heterogeneous Mixtures, pure substances

2) Throwing mixtures into the mix

___________are physical combinations of two or more ___________, the chemical properties of the starting substance do not change. that have no definite or constant composition; the composition of a mixture varies according to whoever prepares the mixture. Each component of the mixture retains its own set of physical and chemical characteristics.

Most of the matter around us consists of__________ of pure substances. Wood, gasoline, wine, soil, and air are all mixtures. The main characteristic of a mixture is that it has_______________. For example, wood is a mixture of many substances, the proportions of which vary depending on the type of wood and where it grows. Mixtures can be classified as______________ (having visibly indistinguishable parts) or_________________ (having visibly distinguishable parts).

Pure substance, element, compound

3) Pure substances

A, ______________like salt or sugar, has a definite and constant composition or makeup. A pure substance can be either an ___________or a, _______________but the composition of a pure substance doesn’t vary.

Element, atom , Protons

4) Elements

An ___________is composed of a single kind of atom. An___________ is the smallest particle of an element that still has all the properties of the element. The atoms in an element all have the same number of protons. _____________are subatomic particles — particles of an atom. The important thing to remember right now is that elements are the building blocks of matter.

more elements, two, physical, chemical

4) Compounds

A compound is composed of __________or_____________ in a specific ratio. For example, water (H2O) is a compound made up of two elements, hydrogen (H) and oxygen (O). These elements are combined in a very specific way — in a ratio of two hydrogen atoms to one oxygen atom (hence, H2O). A lot of compounds contain hydrogen and oxygen, but only one has that special 2-to-1 ratio called water. A compound has ____________and___________ properties different from the elements that make it up.

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Laboratory Safety Symbols

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