Module 1

Question 1

Matter

Answer 1

Anything that has mass and takes up space.

Question 2

Accuracy

Answer 2

An indication of how close a measurement is to the true value.

Question 3

Precision

Answer 3

An indication of the scale on the measuring device that was used.

Question 4

Sig Fig rules

Answer 4

All nonzero digits are significant.

All zeros in front of the first 1-9 digit are not significant.

All zeros between 2 significant figures are significant.

-All zeros at the end of a number and to the right of the decimal point are significant.

Question 5

Scientific notation

Answer 5

1. Place only 1 digit (not a 0) in front of the decimal point.
2. Only significant figures go in front of the multiplication sign.

Question 6

+ - x / sig figs

Answer 6

1. Adding and Subtracting with Significant Figures: When adding and subtracting measurements, round your answer so that it has the same precision as the least precise measurement in the calculation.
2. Multiplying and Dividing with Significant Figures: When multiplying and dividing measurements, round the answer so that it has the same number of significant figures as the measurement with the fewest significant figures.

Unit converters are not considered when counting sig figs.

Question 7

Scientific Method

Answer 7

1. Purpose: What is your goal? What do you want to answer? Example: I would like to know what phase water is at when it is at room temperature.
2. Hypothesis/Prediction: What do you think will happen in this experiment?

Example: I believe that water is liquid at room temperature.

3. Experiment: Test the hypothesis with systematic observations, measurements, and laboratory techniques.
4. Analysis: Determine what the results of the experiment show and decide on the next actions to take.
5. Conclusion: Describe what the results of the experiment show and the next actions to take.