Quiz Review for Scientific Method and

Experimental Design

Mrs. Ball7th grade

GATE science

Scientific Method Definitions

• Scientific Method - A series of steps that a scientist follows to solve a problem or answer a question

• Hypothesis – an educated guess that must be testable

• Experiment – process of testing the hypothesis

• Analysis – collected data and results organized into tables or graphs

• Conclusion – where the hypothesis is stated as “right” or “wrong” and a summary of the results

• Data – information collected from the experiment

• Observations – any information collected with the senses (sight, sound, touch, smell)

Metric Measurementsvalue metric unit tool/instrument

mass gram triple beam balance

length meter ruler or a meter stick

volume of a regular object

meter ruler or a meter stick

(L x W x H)volume of an

irregular objectliter graduated cylinder

(amt of H2O w/ object) – (amt of H2O w/o object) = volume of irregular object

Lab Safety

You must be able to list 2 safety statements. Here are a few examples:• All chemicals in the lab, including food stuff and

store bought chemicals should be treated as if they could be hazardous.

• Lab work should NOT be started until the teacher is present in the room and instructions are given.

• Always wear all safety equipment provided to you.

Steps of the Scientific MethodRemember – Queens Hate Eggs And Cheese

1.Question2.Hypothesis3.Experiment4.Analysis5.Conclusion

Experimental Design• independent variable (IV) - “What is being changed?” - “What is different between the groups?”• dependent variable (DV) - “What is being measured or observed?”• controlled variables (CV) - “What has not been changed?” - “What has stayed the same?”

Students put 1 teaspoon of vinegar in several graduated cylinders. They added red food coloring

to each. Then they added different amounts of baking soda to each graduated cylinder and

observed the amount of foam formed.

IV – amount of baking soda

DV – amount of foam formed

CV – 1 teaspoon of vinegar, red food coloring