variables and safety Lesson 2

Dependent Variable

The variable being tested and measured in an experiment; it is expected to change in response to alterations in the independent variable.

Control Variables

Variables that are kept constant or unaltered throughout an experiment to ensure that the observed changes in the dependent variable are solely due to changes in the independent variable.

Experimental Design

The planning of an experiment to ensure it is scientifically sound and the results are as accurate as possible, including identification and management of variables.

Globally Harmonized System (GHS)

An international standard for the classification and labeling of chemicals that aims to ensure consistent information on chemical hazards and safety measures is available globally.

Chemical Risks

Potential dangers associated with the use or exposure to chemical substances, including health hazards like toxicity or physical hazards such as flammability.

Hazard Pictograms

Standardized symbols used on GHS labels to visually communicate specific information about the hazards of chemical products.

Signal Words

Words used on GHS labels, such as 'Danger' or 'Warning,' to indicate the relative level of severity of a hazard and alert the reader to a potential hazard.

Hazard Statements

Phrases used on GHS labels that describe the nature of the chemical hazards, including the degree of hazard.

Precautionary Statements

Phrases used on GHS labels that describe recommended measures to minimize or prevent adverse effects resulting from exposure to a hazardous chemical or improper storage or handling.

Personal Protective Equipment (PPE)

Items worn to minimize exposure to hazards that can cause serious workplace injuries and illnesses due to contact with various workplace hazards.

Chemical Handling

The process involving the use, storage, and disposal of chemicals which requires specific precautions due to the potentially hazardous nature of the chemicals.

Risk Assessment

The overall process of identifying hazards and risk factors that have the potential to cause harm, analyzing and evaluating the associated risks, and determining ways to eliminate or control the hazard.

Safety Protocols

Defined steps in a procedure aimed at ensuring safety and preventing accidents in the workplace or laboratory settings.