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?

Fill in the Blanks

Give an example of how scientists collect data.

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.