BIO: experimental design

5%

Greatest amount of error?

Scientific method

A series of steps followed to solve problems including collecting data, formulating a hypothesis, testing the hypothesis, and stating conclusions.

Steps of the scientific method

1. Make an observation and pose a question

2. form a hypothesis

3. make a prediction

4. design an experiment

5. analyze data/ draw a conclusion

Null hypothesis

0

No

Can u use proven in the hypothesis?

reject/support

What are some good words to use in a hypothesis

hypothesis

a proposed explanation for an observation of the natural world functions

IF Then Statement

If the IV is changed. then the DV will change however this way bc

Prediction

a statement that forecasts what would happen if the hypothesis were true; recorded for each hypothesis

Experiment

used to test hypothesis by gathering data

control group

the normal group/not affected (standard for comparison)

Experimental group

same as the control but one factor is changed

controlled experiments

Control group and experimental group

Variable

A factor that can change in an experiment

Independent variable

manipulated affects the DV; added to the experimental group to compare to the control group (CHANGED)

Independent variables

ex: levels of water and milk

dependent variable

responding variable; measured/counted

quantitative data

numerical data (using instruments)

qualitative data

data gathered through senses

inferences

A conclusion reached on the basis of evidence and reasoning (facts0

bias

making a judgement based on prior knowledge

scientific theory

a well-tested concept that explains a wide range of observations acquired thoruhg the scientific method and is repeatedly tested/confirmed; pref using a written, pre defined, protocol of obvs and experiments