Studied by 0 people
quantitative observation
A(n) ________ is also known as measurement involves a number and a unit.
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.
possible explanation
A hypothesis is a(n) ________ for an observation.
mixture
When a(n) ________ is separated, the absolute purity of the separated components is an ideal.
electric current passes
When a(n) ________ through, water is decomposed to hydrogen and oxygen, which makes them be two- atom molecules.
STM
The ________ uses an electron current from a tiny needle to probe the surface of a substance.
Solid
________ is rigid and has a fixed volume.
gasoline
Wood, ________, wine, soil, and air are the mixtures.
hydrogen
Water is composed of two types of atoms: ________ and oxygen.
qualitative
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 ________.
motives
Science is affected by profit ________, budgets, fads, wars, and religious belief.
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.
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.
Physical change
________**: It is used to separate a used mixture into pure compounds and change in the form of a substance.
pure substances
Mixtures can be separated into ________ by physical methods.
