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# Tools/ Ex. Design

### Stack #135320

Hypothesis An if/then statement that provides an educated guess
Variable Things or factors that can be assigned or have different values in an experiment
Independent Variable (IV) A variable purposely changed by the experimenter; also known as the manipulated variable
Dependent Variable (DV) The factor or variable that may change as a result of changes purposely made in the independent variable; also know as the responding variable
Control The part of an experiment that serves as a standard of comparison
Experimental Design A graphic illustration of an experiment
Repeated Trials the number of times you repeat the experiment (the actual number of times may vary due to the complexity of the research project. Use from 3
Qualitative Data Data that are readily observable by the five senses such as shape, size or gender
Inference a possible conclusion based on observation
Quantitative Data Data gathered using one’s five senses without using a standard scale (ex. Blue color) Data gathered from amounts or measurements (ex. 25 milliliters, 10 grams)
Triple beam balance Used to measure mass; used a base unit of grams (g)
Meniscus The lowest point of a curve of a liquid in a graduated cylinder; usually read from the lowest point of the curve
Test tube Used to hold, store or heat small amount of substances
Beaker Used to hold or heat large amount of substances; not useful for precise measuring
Tongs Used to handle glassware
Thermometer Used to measure temperature; the Celsius scale (°C) is used in science
Metric ruler or meter stick Used to measure length or distance; uses a base unit of meter (m)
Metric system A system of measurement used by the scientific community
Mass The amount of stuff or matter in an object
Matter Something that has mass and takes up space (volume)
Volume The amount of space and object takes up
Energy The ability to do work or cause change
Graph A pictorial display of data
Bar graph A graph used to represent a set of data that does not show continuous change
Line graph A graph used to show continuous change
Interval The equal sizes values represented by equal spaces on an axis
Created by: mrsmoberg

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