# Experimental Design, Metric Units, Conversion, and Measurments Vocabulary.

## 20 terms · Experimental Design, Metric Units, Conversion, and Measurments Vocabulary for Dr. Goodwin's Unit 1 Test.

### Independent (Manipulated) Variable

The variable that you are testing and purposely changing

### Dependent (Response) Variable

The factor that changes because of the manipulated variable

### Control Group

in an experiment, a group that serves as a standard of comparison with another group to which the control group is identical except for one factor

### Replicate (Sample Size)

The number of times you do the experiement per experimental group or how many times you test something per experiemental group.

### Controlled (Constant) Variables

the variables that are kept the same during an experiment

### Continuous Variable

A quantitative variable that can assume an uncountable number of values. Can assume any value along a line interval, including every possible value between any two values.

### Discrete (Categorical) Variable

Distinct groupings and no variation in between those groups. Appropriate to use a bar graph.

### Hypothesis

Specific declaritive statement; educated guess on what you believe the relationship between the control group and test group.

### Prediction

A statement made in advance that expresses the results that will be obtained from testing a hypothesis if the hypothesis is supported; the expected outcome if a hypothesis is accurate.

### Mass

The amount of matter in an object.

### Weight

The force that gravity exerts on an object's mass.

### Volume

The amount of space an object takes up.

### Density

the amount of mass in a given volume; mass divided by volume

### Accuracy

the quality of nearness to the truth or the true value

### Precision

the quality of being reproducible in amount or performance

### Graduated Cylinder

instrument used to measure volume of a liquid

### Meniscus

the curve at a liquid's surface by which you use the botom to measure the volume of the liquid

### Laboratory Balance

The tool used to find mass, what we used in the mass of air lab.

### Precision of an instrument

1 place past the marks. Even if the answer is a whole number use zeros to get the correct precision.

### Water Displacement

a method used to find the volume of an irregular solid