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# SCI-7 U1

### All Words

TermDefinition
observation An act of noting and recording an event, behavior, or fact with an instrument or with the 5 senses.
inference A logical conclusion drawn from the available evidence and prior knowledge.
bias Basing conclusions on opinion rather than information.
science The general method we use to discover answers to questions about the universe by carefully thinking about the question, guessing the answer, and testing our guess.
hypothesis A tentative explanation for an observation or scientific problem that can be tested by a scientific experiment.
scientific experiment An organized procedure used to study something under controlled conditions.
independent variable The one factor that you are testing in your experiment and the only factor which causes change.
dependent variable The measure of the response or change that has occurred due to a change in the independent variable.
standardized variables All the factors which must be kept the same in order to know that observed changes are due to a change in the independent variable only.
control group Another group in an experiment that is the same in every way except it does not have the independent variable applied to it and is used for comparison.
mean The average of a set of numbers. Calculated by adding up all of the numbers and then dividing by the number of numbers in the set.
median The middle number of a set of numbers that has been placed in order.
mode The number in a set of data that occurs most often.
range The least value and the greatest value in a set of data.
Metric System The system of measurement used by all scientists.
length The straight line distance between two points.
meter The Metric base unit of measure for length.
mass The amount of matter in an object.
gram The Metric base unit of measure for mass.
balance The tool used for measuring the mass of an object.
weight A measure of the force of gravity pulling on an object.
Newton The Metric unit of measure for weight.
volume The amount of space and object takes up or how much liquid a containeer can hold.
liter The Metric base unit of liquid volume.
graduated cylinder A lab tool used for measuring volume.
water displacement A method used to find the volume of an irregularly shaped object.
precision The consistency of measurment and how well you can do the same thing over and over.
accuracy The difference between a measurement and the actual value.
conclusion A paragraph summarizing the purpose and results of an investigation, whether your hypothesis is accepted or rejected, a question for further research, something you learned, and advice you have for other scientists conducting the same investigation.
temperature The measure of the average kinetic energy of the molecules in a substance and is the numerical measure of how hot or cold something is.
degrees Celsius The metric unit of measure for temperature.
thermometer The tool used to find the temperature of something.
cubic centimeter The unit of measure for measuring solid volume.
faulty reasoning Occurs when the conclusion is not supported by the data.
scale The laboratory instrument used to measure weight.
Created by: susanmason