# science measurement & experiments

## 36 terms

### Accuracy

Compares a measurement to the real or accepted value

### Bias

Something that can affect how the results of an experiment are viewed

### Constant

Variable that doesn't change in an experiment

### Control

Standard for comparison that is used in an experiment

### Density

Mass per unit volume of a material

### Dependent Variable

What the independent variable in an experiment might change

### Independent Variable

Factor in an experiment that is changed by the experimenter

### Experiment

Test of a hypothesis

### Graph

Visual display of information or data

### Hypothesis

Testable prediction

### Mass

Measurement of the quantity of matter

### Model

Representation of an idea, event, or object

### Precision

How closely measurements are to each other

### Scientific Law

Rule of nature that tells you what will happen under certain conditions

### Scientific Method

Organized set of investigation procedures

### International System of Units

A complete metric system of units of measurement for scientists

### Technology

Another term for applied science

### Theory

Explanation based on many observations supported by experimental results

### Variable

Factor that can change the results in an experiment

### Volume

Amount of space occupied by an object

### Meter

The basic unit of length adopted under the SI

### Gram

A metric unit of weight equal to one thousandth of a kilogram

### Kelvin

SI unit of temperature; indicates number of units above absolute zero. To go from Celsius to Kelvin add 273. To go from Kelvin to Celsius subtract 273.

### Second

Unit for measuring time

1,000

100

10

1/10 or .1

1/100 or .01

1/1000 or .001

### Prefix

added in front of the word

### Liter

SI unit for volume

### Data

A collection of facts from which conclusions may be drawn

### Circle Graph

A graph that shows parts of a whole as percentages

### Bar Graph

A graph that uses horizontal or vertical bars to display data

### Line Graph

this graph displays data using points connected by line segments