How can we help?

You can also find more resources in our Help Center.

33 terms

Science Midterm Vocab

STUDY
PLAY
chemistry
the study of the composition, structure, properties, and reactions of matter
physics
the study of matter and energy and the interactions between the two through forces and motion
geology
the study of the origin, history, and structure of the earth
astronomy
the study of the universe beyond earth, including the sun, moon, planets, and stars
biology
the study of the origin of living things
scientific method
an organized plan for gathering, organizing, and communicating information
observation
information that you obtain through your senses
hypothesis
a proposed answer to a question
manipulated variable
a variable that causes a change in another
responding variable
a variable that changes in response to the manipulated variable
controlled experiment
an experiment in which one variable, the manipulated variable, is deliberately changed at a time
scientific law
a statement that summarizes a pattern found in nature
model
representation of an object or event
volume
the amount of space taken up by an object
mass
the quantity of matter in an object or sample
length
the straight-line distance between two points
precision
a gauge of how exact a measurement is
significant figures
all the digits that are known in a measurement plus the last digit that is estimated
accuracy
the closeness of a measurement to the actual value of what is being measured
thermometer
an instrument that measures temperature or how hot an object is
slope
the ratio of a vertical change to the corresponding horizontal change
direct porportion
is a relationship in which the ratio of two variables is constant
inverse porportion
the product of two variables is constant
element
a substance that cannot be broken down into simpler substances
atom
the smallest particle of an element
compound
a substance that is made from two or more simpler substances and can be broken down into simpler substances
heterogeneous mixture
the parts of the mixture are noticeably different from one another
homogeneous mixture
the substances are so evenly distributed that is difficult to distinguish one substance in the mixture from another
solution
when substances dissolve and form a homogeneous mixture
suspension
a heterogeneous mixture that seperates into layers over time
colloid
contains some particles that are intermediate in size between the small particles in a solution and the larger particles in a suspension
distillation
a process that seperates substances in a solution based on their boiling points
precipitate
any solid that forms and seperates from a liquid mixture