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24 Cards in this Set

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  • Back
Matter is defined by its characteristics. It takes up space and its has mass.
Mass is a measure of the amount of matter in an object.
Weight is the measure of the earth's pull of gravity on an object.
Volume is the amount of cubic space that an object occupies.
Density is the mass of a substance contained per unit of volume. Density is stated in grams per cubic centimeter (g/cm3) where the gram is the standard unit of mass. To find an object's density, you must measure its mass and its volume. Then divide the mass by the volume (D = m/V).
Specific gravity?
Specific gravity is the ratio of the density of a substance to the density of water.
Physical change?
Physical change is a change that does not produce a new substance.
Chemical change?
Chemical change is any change of a substance into one or more other substances.
Substances can have two variables of conducttivity: conductor or insulator.
Conductor is a material through which electric charges can easily flow.
Insulator is a material through which electric charges do not move easily, if at all.
Solubility is defined as the amount of substance (referred to as solute) that will dissolve into another substance, called the solvent. The process is called solvation.
Melting point?
Melting point refers to the temperature at which a solid becomes a liquid.
Boiling point?
Boiling point refers to the temperature at which a liquid becomes a gas.
Hardness describes how difficult it is to scratch or indent a substance.
The phases of matter?
The phase of matter is defined by its shape and volume.
A solid has a definite shape and volume.
A liquid has a definite volume, but no shape.
A gas has no shape or volume because it will spread out to occupy the entire space of whater container it is in.
Energy is the ability to cause change in matter.
Evaporation is the change in phase from liquid to gas.
Condensation is the change phase from gas to liquid.
Metals are giant structures of atoms held together by metallic bonds. Metals tend to have high melting and boiling points because of the strength of the metallic bond.
A crystal is a regular, repeating arrangement of atoms, ions or molecules. There are two kinds of crystals: Solid and Liquid.
Solid Crystals?
Solid Crystals, positive ions attract negative ions to form a cube shaped arrangement like that of sodium chloride. The strong attractive forces between the oppositely charged ions held them together. This strong attractive force is called an ionic bond.
Liquid Crystals?
When a solid melts, it crystal lattice disintegrates and its particles lose their three dimensional pattern. However, when some materials called liquid crystals melt, they lose their rigid organizational in only one or two dimensions.
Characteristics of crystals?
1. Symmetry
2. Crystalline structures are universal
3. Crystallographic defects
4. Electrical properties
5. Crystal system