Accuracy_Qualitative_Dependent Quiz

Four students measured the mass of a sample of zinc sulfate several times and found it to be 4.81 g, 4.82 g, 4.79 g and 4.80 g.The actual mass of zinc sulfate was 4.81 g.The student’s measurements were _____________.

• inaccurate and imprecise

• inaccurate and precise

• accurate and imprecise

• accurate and precise

Which of the following is a qualitative observation?

I. Water is colorless

II. A test tube is made of pyrex

III. The density of water is 1.0 g/mL

• I only

• II only

• I and II only

• I, II and III

Which of the following is a qualitative observation about a piece of metal?

• It has a volume of 4.3 ml

• It has a mass of 2.2 g

• It has a density of 0.51 g/ml

• It is silvery in color

.....................refers to how close a measured value is to an accepted value.

• Precision

• Accuracy

• Imprecision

• Inaccuracy

In an experiment is the one that the experimenter plans to change is called..........

• Dependent variable

• Independent variable

• Controlled variable

• Equal variable

A student thinks that if plants are exposed to different colors of light then they will grow better.

The independent variable in the above statement is......

• Plant growth

• Colors of light

• Soil type

• Plant type

A technician experimentally determined the mass of a beaker to be 120.5 g. The actual mass of the beaker is 117.9 g. The error is ______ g.

• - 2.6

• 2.6

• - 2.3

• 2.3

The accepted value of a length measurement is 200 cm, and the experimental value is 198 cm. The percentage error of this measurement is ________.

• 2 %

• 1 %

• -1 %

• -2%

The graph shown a .....................slope.

• negative

• positive

• neutral

• inverse

The dependent variable of the graph is represented by the....

• y-axis (A)

• x-axis (B)

• axes labelled A and B

• None of the axes