PS: Unit 1 Study Material

What is the result you get from an experiment called?

• Independent variable

• Dependent variable

• Constant variable

• Control variable

Write a hypothesis for the following scenario AND label the independent variable and the dependent variable: You want to know if different sized objects fall at different rates.

• Hypothesis: Larger objects fall faster. Independent variable: Size of objects. Dependent variable: Rate of fall.

• Hypothesis: All objects fall at the same rate. Independent variable: Rate of fall. Dependent variable: Size of objects.

• Hypothesis: Smaller objects fall faster. Independent variable: Rate of fall. Dependent variable: Size of objects.

• Hypothesis: Objects fall at different rates based on color. Independent variable: Color of objects. Dependent variable: Rate of fall.

What is quantitative data? Give an example.

• Data that can be measured and expressed numerically, like height or weight.

• Data that describes qualities or characteristics, like color or texture.

• Data that is always subjective and cannot be measured.

• Data that is only used in scientific experiments.

What is qualitative data? Give an example.

• Data that can be measured and expressed numerically, like height or weight.

• Data that describes qualities or characteristics, like color or texture.

• Data that is always objective and can be measured.

• Data that is only used in mathematical calculations.

How do you find the range of a data set?

• Subtract the smallest value from the largest value.

• Add all the values together.

• Divide the sum of all values by the number of values.

• Multiply the smallest value by the largest value.

What does the average (mean) of a data set tell you?

• The most frequently occurring value in the data set.

• The middle value when the data set is ordered.

• The sum of all values divided by the number of values.

• The difference between the largest and smallest values.

What type of graph would best show changes over time?

• Pie graph

• Line graph

• Bar graph

• Scatter plot

What is the difference between precision and accuracy?

• Precision refers to how close measurements are to each other, while accuracy refers to how close measurements are to the true value.

• Precision refers to how close measurements are to the true value, while accuracy refers to how close measurements are to each other.

• Precision and accuracy are the same.

• Precision is only important in scientific experiments.

Which measuring tool is more precise?

• a beaker

• a graduated cylinder

• a flask

• a ruler

How many significant figures are in the number 987.65?

• 3

• 4

• 5

• 6