Quantitative vs. Qualitative, Accuracy vs. Precision

Scientific Method, Quantitative vs. Qualitative, Accuracy vs. Precision

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Multiple Choice

What is the first step of the scientific method?

• Conclusion

• Record and analyze data

• Observation

• Research

Multiple Choice

What is the second step of the scientific method?

• Observations

• Analyze data

• Research

• Experiment

Open Ended

Define hypothesis

Multiple Choice

How many variables should be changed in a controlled experiment?

• 1

• 2

• 10

• As many as you want

Open Ended

What is the difference between a dependent variable and an independent variable?

Multiple Choice

What is the name of the last part of the scientific method?

• Research

• Conclusions

• Observations

• Collect data

Qualitative vs. Quantitative Observations

• Qualitative observations use your senses to observe the results. (Sight, smell, touch, taste and hear.)

  
  

• Quantitative observations are made with instruments such as rulers, balances, graduated cylinders, beakers, and thermometers. These results are measurable.

Open Ended

Define Quantitative observation:

Open Ended

Define Qualitative Observation:

Multiple Choice

Which of the following is a quantitative observation?

• The salt is white

• The salt has a mass of 5g.

• The salt forms ionic bonds.

• The salt forms a crystalline solid

Multiple Choice

Which of the following is a qualitative observation?

• The water has a volume of 10 mL.

• The water has a mass of 10 g.

• The water has a density of 1g/mL.

• The water is a liquid

Open Ended

Define accuracy.

Open Ended

Define precision

Multiple Choice

Which of the following choices best defines accuracy?

• A measure of how much a set of measurements vary from each other and the accepted value.

• A measure of how close a series of measurements are to one another.

• A measure of how close a measurement is to the correct or accepted value for the quantity being measured.

Multiple Choice

Which of the following best describes precision?

• A measure of how much a series of measurements deviates from the accepted value.

• A measure of how close a series of measurements are to one another.

• A measure of how close a set of measurements are to the accepted value.