# Worksheet: Health and Safety in Experiments

In this worksheet, we will practice using the terms risk, hazard, and severity to describe the dangers involved in conducting scientific experiments.

Q1:

Which of the following statements best corresponds to the meaning of “hazard” as used in the design of scientific experiments?

• AA hazard is an activity where a harmful event may occur.
• BA hazard is the estimated probability of an event that would cause harm to occur.
• CA hazard is the possibility of an event that would cause harm to occur.
• DA hazard is the harm that results from a harmful event.

Q2:

Which of the points on the graph of risk and hazard severity best corresponds to the activity of measuring the gas pressure required to rupture a thick steel container?

• APoint D
• BPoint C
• CPoint B
• DPoint A
• EPoint E

Q3:

Which of the following statements best corresponds to the meaning of “risk” as used in the design of scientific experiments?

• ARisk is the harm that results from a harmful event.
• BRisk is the possibility of an event that would cause harm to occur.
• CRisk is the estimated probability of an event that would cause harm to occur.
• DRisk is a potentially harmful event.

Q4:

Which of the points on the graph of risk and hazard severity best corresponds to the activity of measuring the weight of a cup of water that is filled to the brim by a high-speed flow of water?

• APoint E
• BPoint B
• CPoint A
• DPoint C
• EPoint D

Q5:

Which of the points on the graph of risk and hazard severity best corresponds to the activity of using a knife to cut a vegetable into slices to prepare them for immersion into room temperature water?

• APoint A
• BPoint E
• CPoint C
• DPoint D
• EPoint B

Q6:

Which of the following statements best corresponds to the meaning of “severity” as used in the design of scientific experiments?

• ASeverity is an activity where a harmful event may occur.
• BSeverity is the seriousness of the harm that results from a harmful event.
• CSeverity is the estimated probability of an event that would cause harm to occur.
• DSeverity is a potentially harmful event.

Q7:

Which of the points on the graph of risk and hazard severity best corresponds to the activity of measuring the temperature of water being boiled in a beaker that is heated over a Bunsen burner?

• APoint A
• BPoint B
• CPoint C
• DPoint E
• EPoint D

Q8:

Which of the following factors tends to unrealistically reduce people’s estimation of a hazard’s risk level?

• ABeing given accurate information about the risk level of the hazard
• BAccumulated experience of exposure to the hazard
• CBeing given information that overestimates the severity of the hazard
• DNot having a choice about whether to accept the risk

Q9:

A scientist works in a nuclear power station where the level of ionizing radiation is approximately 2 percent higher than the natural background level. The scientist never works closely with any highly radioactive materials. The scientist continues to work at the power station for several years.

An engineer works in a hydroelectric power station that contains large turbines that produce continual high sound levels at frequencies that cannot be effectively blocked by ear protectors. The engineer continues to work at the power station for several years and spends a significant amount of time in proximity to the turbines.

Who is more at risk due to their work, the scientist or the engineer?

• AThe engineer is at more risk than the scientist.
• BThe scientist is at more risk than the engineer.
• CThey are both at equal risk.

Who faces higher hazard severity due to their work, the scientist or the engineer?

• AThe engineer faces higher hazard severity than the scientist.
• BThey both face equal hazard severity.
• CThe scientist faces higher hazard severity than the engineer.

Q10:

Which of the points on the graph of risk and hazard severity best corresponds to the activity of measuring the length of an unstretched piece of string?

• APoint
• BPoint
• CPoint
• DPoint
• EPoint