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30 Cards in this Set
- Front
- Back
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Metric System
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a system of measurements in which all units are based on multiples of 10
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Milli-
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1/1000th
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centi-
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1/100th
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kilo-
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1000
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Mass
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the measure of the amount of matter in an object; base unit is gram
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Types of Balances
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Triple-beam balance, pan balance, electronic balance
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Volume
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the amount of space that matter occupies; measured in liters or milliliters
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Density
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the measure of how much mass is contained in a given volume
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Formula for Density
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d=m/v
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Temperature
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the measure of average kinetic energy of the particles of a sample of matter
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Purpose of the Scientific Method
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an orderly method of gaining, organizing, and applying new knowledge based on rational thinking and experimentation
****prevents BIAS - assures that research is conducted in a safe and accurate manner |
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Steps of the Scientific Method
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1) Question
2) Research 3) Hypothesis 4) Experiment 5) Results 6) Conclusion 7) Publish |
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Question
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make an observation or ask question
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Research
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gather information about the topic
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Hypothesis
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a possible explanation, prediction, or answer to a scientific question based on your observations, research, and/or prior knowledge
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Experiment
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design and run an experiment to test the/your hypothesis
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Results
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gather, organize, and interpret the data from the experiment
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Conclusions
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make conclusions based on the hypothesis and results
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Publish
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communicate results with the scientific community
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Controlled Experiment
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ALL conditions must be kept the same except the one variable that is being tested
-helps the scientist eliminate bias and be objective |
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Variables
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Independent, and Dependent
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Dependent
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the variable that changes in response to the independent variable (the effect)
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Independent
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the variable that is purposely being changed by the experimenter (the cause)
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Control Group
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experiment run where independent variable is under normal conditions
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Experimental group
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test group that in which the independent variable is changed
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Sample Size
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the number of repeated measurements made or the number of individuals studied that make up the data
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Quantitative
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numbers, measurements, or amounts
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Qualitative
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descriptions, characteristics
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How do you find the volume of an irregular object?
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You find the volume of an irregular shaped object by reading the amount of water in the graduated cylinder BEFORE you put the object into the water. Then you gently slide the object into the cylinder and record. You will subtract the recorded amount without the object from the amount with the object. This difference is how much volume the irregular shaped object has.
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What are three ways to make an experiment reproducible?
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Three ways to make an experiment reproducible are to make sure observations are accurate, detailed, and complete.
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