Studied by 9 people
quantitative observation
A(n) ________ is also known as measurement involves a number and a unit.
Filtration
________: A mixture poured onto a mesh, which passes the liquid and leaves the solid behind.
Observation
________: something that is witnessed and can be recorded.
pure substance
When a mixture contains several volatile components, the one- step distillation does not give a(n) ________ in the receiving flasks, and more elaborate methods are required.
STM
The ________ uses an electron current from a tiny needle to probe the surface of a substance.
hypothesis
A ________ is a possible explanation for an observation.
mixture
When a(n) ________ is separated, the absolute purity of the separated components is an ideal.
Natural law
________: observed behavior into a statement.
Water
________ is composed of two types of atoms: hydrogen and oxygen.
gasoline
Wood, ________, wine, soil, and air are the mixtures.
Solid
________ is rigid and has a fixed volume.
qualitative observation
A(n) ________ does not involve a number.
liquid
A(n) ________ has a definite volume but no specific shape.
bridges
The atoms are connected to one another by ________.
Chromatology
________: The general name applied to a series of methods that use a system with two phases of matter (mobile phase and stationary phase)
Celsius
Both the ________ and Kelvin scale are used in physical sciences.
Density measurement
________ is also used to determine the amount of antifreeze and the level of protection against freezing.
chemical balance
Weighing something on a(n) ________ involves comparing the mass of that object to a standard mass.
Distillation
________ is one of the most important methods for separating the components of a mixture.
Theories
________ are human inventions that represent attempts to explain observed natural behavior.
measurement
A(n) ________ always consists of two parts: a number and a scale.
Physical change
________: It is used to separate a used mixture into pure compounds and change in the form of a substance.
Science
________ is affected by profit motives, budgets, fads, wars, and religious belief.
Certain digits
________: Results that show the first three numbers that remain the same regardless of who makes the measurements.
Body mass
________ is the same on the earth and the moon.
Mixtures
________ can be separated into pure substances by physical methods.
Pure substances
________ are either compounds or free elements.
