science

system of knowledge and methods you use to find that knowledge

technology

use of knowledge yo solve practical problems

chemistry

study of the composition, structure, properties, and reactions of matter

physics

study of matter and energy and the interactions between the two through forces and motion

geology

study of the origin, history, and structure of earth

astronomy

study of the universe beyond earth, including the sun, moon, planet, and stars

biology

study of living things

scientific method

organized plan for gathering, organizing, and communicating information

observation

information that you obtain through your senses

hypothesis

proposed answer to a question

manipulated variable

variable that causes change in another

responding variable

variable that changes in response to the manipulated variable

controlled experiment

experiment in which only one variable, the manipulated variable, is deliberately changed at a time

scientific theory

well tested explanation for a set of observations or experimental results

scientific law

statement that summarizes a pattern found in nature

model

representation of an object or event

scientific notation

expressing a value as the product of a number between 1 and 10 and a power of 10

length

straight line distance between two points

mass

quantity of matter in an object or sample

volume

amount of space taken up by an object

density

ratio of an object's mass to its volume

density

mass divided by volume

conversion factor

ratio of equivalent measurements that is used to convert a quantity expressed in one unit to another unit

precision

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

closeness of a measurement to the actual value of what is being measured

thermometer

instrument that measures temperature or how hot an object is

slope

steepness of a line

slope

rise over run

direct proportion

relationship in which the ratio of two variables is constant

inverse proportion

relationship in which the product of two variables is a constant