chemistry I

Science that studies the composition, structure, properties and changes of matter. chemistry. physics. biology.

Is anything that has mass and occupies space. weight. mass. element.

Have a fixed or definite composition. pure substance. mixture.

is composed of one type of atom, cannot be separated into simpler substances by physical or chemical means. compound. mixture. element.

is composed of two or more elements and always combined in the same proportion. Can be broken down into simpler substances by chemical means. compound. element. mixture.

• Contain two or more different substances that are physically mixed but not chemically combined. • Proportions may change • Can be separated using physical methods. compound. element. mixtures.

the composition is uniform throughout; the different parts of the mixture are not visible. homogeneous. heterogeneous.

the composition varies from one part of the mixture to another, the different parts of the mixture are visible. homogeneous. heterogeneous.

physical processes that are based on differences in the physical properties of the substances. separation methods. physical property.

match. separation methods for heterogeneous mixtures. separation methods for homogeneous mixtures.

choose the correct definition for decantation. Is used when a solid is insoluble in a liquid or when two liquids are non-soluble. Uses a porous barrier to separate a solid from a liquid. The liquid passes through, leaving the solids trapped in the filter paper. A system where suspended solids take time in settle down, it is used to accelerate sedimentation.

choose the correct definition for filtration. It is used when a solid is insoluble in a liquid or when two liquids are non-soluble. Uses a porous barrier to separate a solid from a liquid. The liquid passes through, leaving the solids trapped in the filter paper. A system where suspended solids take time in settle down, it is used to accelerate sedimentation.

choose the correct definition for centrifugation. Is used when a solid is insoluble in a liquid or when two liquids are non-soluble. Uses a porous barrier to separate a solid from a liquid. The liquid passes through, leaving the solids trapped in the filter paper. A system where suspended solids take time in settle down, it is used to accelerate sedimentation.

The mixture is heated until the boiling point. The liquid part evaporates and the solid part remains as a residue at the bottom of the container. evaporation. distilation. chromatography.

It is based on differences in the boiling points of the substances involved. A mixture is heated until the substance with the lowest boiling point boils to a vapor that can then be condensed into a liquid and collected. evaporation. distilation. chromatography.

Separates the components of a mixture based on the ability of each component to travel or be drawn across the surface of another material. evaporation. distilation. chromatography.

match. solid. liquid. gas.

when a substance is cooled to temperatures very close to absolute zero. At this extremely low temperature, molecular motion comes very close to stopping altogether. The Bose-Einstein condensate (BEC). plasma.

Consists of highly charged particles with extremely high kinetic energy. The Bose-Einstein condensate (BEC). plasma.

can be observed or measured without affecting the identity of a substance. physical property. chemical property.

describe the ability of a substance to combine with or change into one or more other substances. physical property. chemical property.

choose physical properties. Hardness. hydrolysis. melting point. oxidation. reduction. viscosity.

choose chemical properties. Hardness. hydrolysis. viscosity. oxidation. reduction. melting point.

from solid to liquid. melting. freezing. evaporation.

from liquid to solid. melting. freezing. evaporation.

from liquid to gas. melting. freezing. evaporation.

from gas to liquid. condensation. sublimation. deposition.

from solid to gas without passing through liquid. sublimation. deposition. condensation.

from gas to solid directly. condensation. sublimation. deposition.

temperature at which a solid becomes a liquid. melting point. freezing point. boiling point.

temperature at which a liquid changes to solid. melting point. freezing point. boiling point.

temperature at which a liquid changes to gas. melting point. freezing point. boiling point.

Is any manifestation of the transformation of matter that can be perceived by our senses. chemical phenomena. physical phenomena.

any phenomena that occurs by nature. antropogenic. natural.

any pgenomena that happens with the help of humans. antropogenic. natural.