PSH Pre-Test

What is the primary function of a graduated cylinder in a lab? Mark only one oval.

• Measuring mass

• Measuring volume

• Heating substances

• Mixing chemicals

Which of the following is NOT a proper lab safety practice? Mark only one oval.

• Wearing goggles when handling chemicals

• Tying back long hair when near flames

• Eating food while working in the lab

• Cleaning spills immediately

What is the first step of the scientific method? Mark only one oval.

• Analyze data

• Form a hypothesis

• Make an observation

• Perform an experiment

Convert 2500 milliliters to liters. Mark only one oval.

• 0.25 L

• 2.5 L

• 25 L

• 250 L

The graph below shows temperature over time. What is the dependent variable?

• Time

• Temperature

• Units of measurement

• The x-axis

What is the result of (6.02x10^3)+(3.98x10^3)?

• 10 x 10^3

• 1.0x10^4

• 1.001x10^4

• 1.0x10^3

How many significant figures are in the number 0.003050? Mark only one oval.

• 3

• 4

• 5

• 6

Which of the following is an example of dimensional analysis? Mark only one oval.

• Converting meters to centimeters

• Comparing mass and volume

• Drawing a scientific graph

• Identifying subatomic particles

Which piece of lab equipment is best suited for measuring the mass of a marble? Mark only one oval.

• Triple beam balance

• Graduated cylinder

• Erlenmeyer flask

• Bunsen burner

In scientific graphing, the independent variable is plotted on which axis? Mark only one oval.

• X-axis

• Y-axis

• Z-axis

• It depends on the graph.