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Scientific Methods

Qualitative Observation Observations that describe using words
Quantitative Observation Observations that are described with numbers; measured or counted
Inference An explanation of an observation based on background knowledge; an assumption
Scientific method The process scientists use to solve problems
State the Problem A question or statement that explains the purpose of the scientific investigation
Hypothesis A scientific prediction about the outcome of an investigation
Experiment A controlled test of a hypothesis set up by the scientist
Independent variable The variable the scientist changes on purpose; what is being tested
Dependent variable The variable that responds to the change made by the scientist; what is measured or affected
Constants Variables that are kept the same throughout the experiment so they don't affect the outcome
Control The experimental set-up that is used for comparison; a set-up that does not get tested
Data The facts, measurements, and observations collected during an experiment
Conclusion The summary of the results, or the outcome of an experiment
Theory A logical explanation of a natural occurrence
Law A theory that becomes accepted as true
Repeated trials Doing the experiment several times to ensure accuracy of the data
I.V. = sugar D.V. = amount of carbon dioxide Identify the Independent & Dependent Variables - What is the effect of sugar on the amount of carbon dioxide produced by yeast?
I.V. = air temperature, D.V. = number of cricket chirps Identify the Independent & Dependent Variables - If the air temperature is increased then the number of cricket chirps will decrease.
Problem Statement Which part is it? Which type of birdseed will attract the greatest number of birds?
Hypothesis Which part is it? If water is added to the beans then they will increase in size.
Conclusion Which part is it? The data shows the nickel held more water drops than the dime or the quarter. My hypothesis was not supported by the data.
The control is the tank with no fish in it. Identify the control in this experiment - David set up 4 containers with different numbers of fish. 1 = 2 fish, 2 = 4 fish, 3= 6 fish, 5 = 0 fish.
The experiment What part is it? Set up four aquariums with the same water and light. In tank 1 put 2 fish, tank 2 with 4 fish, tank 3 fish gets 6 fish and tank 4 gets no fish.
The side that only received water What's the control? Homer thinks coconut juice will clean the green slime in his shower. He sprays half of his shower with coconut juice and the other half with water.
I.V. = different flower colors D.V. = bee response Identify the Independent & Dependent variables - How do bees respond to different colors of flowers?
Created by: nbiegel