20 Questions
What is the definition of Independent Variable (IV)?
The variable manipulated by the researcher to observe its effect on the dependent variable.
What does Dependent Variable (DV) refer to?
The variable observed and measured in response to changes in the independent variable.
What is the purpose of a Controlled Variable (CV) or Constant in an experiment?
Factors kept constant to ensure observed changes are due to the independent variable.
Define Scientific Method.
A systematic, logical approach used by scientists to investigate natural phenomena.
What is a hypothesis?
A testable and falsifiable statement that predicts the outcome of an experiment.
What do qualitative observations involve?
Non-numerical descriptions of qualities, characteristics, or attributes.
How do quantitative observations differ from qualitative observations?
Quantitative observations involve measurements and numerical data, providing objective and precise information.
What does WHMIS stand for?
Workplace Hazardous Materials Information System.
Explain the difference between short-term and long-term effects of chemical exposure.
Short-term effects are immediate and temporary, while long-term effects are delayed and chronic.
What are the ways chemicals can enter the body?
Inhalation, ingestion, absorption through the skin (dermal exposure), and injection.
In a plant growth experiment, what is considered the dependent variable?
Height of the plants
Which type of variable is intentionally kept constant in an experiment to isolate the effect of the independent variable?
Controlled Variable
What is a scientific question defined as?
A specific, clear, and testable inquiry
Which type of variable is used to measure, test, or observe the effects of different conditions in experiments?
Scientific Variable
What is the purpose of a controlled variable in an experiment?
To ensure observed changes are due to the independent variable
What is the main purpose of a hypothesis in an experiment?
To offer a testable explanation for an observed phenomenon
How do qualitative observations differ from quantitative observations?
Qualitative observations are non-numerical, while quantitative observations involve measurements and numerical data
What is the main purpose of WHMIS labels in workplaces?
To provide basic hazard information for internal use
Which method of chemical entry into the body involves needles?
Injection
What do hazard symbols on WHMIS labels indicate?
Pictograms for types of hazards associated with the product
Study Notes
- Types of variables in scientific research: Independent Variable (IV), Dependent Variable (DV), Controlled Variable (CV), Scientific Variable
- Independent Variable: manipulated by researchers to observe effects, example: amount of sunlight in plant growth experiment
- Dependent Variable: observed and measured in response to IV changes, example: height of plants in plant growth experiment
- Controlled Variable: kept constant in experiment to ensure observations are due to IV, examples: soil type, pot size, watering frequency
- Scientific Variable: any factor used to measure, test, or observe effects of different conditions
- Scientific Method: systematic approach to investigate natural phenomena, involves making observations, forming hypothesis, conducting experiments, collecting data, drawing conclusions
- Scientific Question: specific, clear, testable inquiry that guides investigation, arises from observations or curiosity
- Hypothesis: testable and falsifiable statement predicting experiment outcome, tentative explanation for observed phenomenon
- Qualitative Observations: non-numerical descriptions of qualities, provide detailed subjective understanding
- Quantitative Observations: involve measurements and numerical data, provide objective and precise information
- Workplace Hazardous Materials Information System (WHMIS): system providing information on safe use of hazardous materials, includes labeling, MSDS, worker education
- Long-Term and Short-Term Effects of Chemical Exposure: Short-Term: immediate, temporary health impacts; Long-Term: delayed, chronic health impacts
- Ways Chemicals Enter the Body: inhalation, ingestion, dermal exposure, injection
- WHMIS Labels: Supplier Label: includes product identifier, hazard symbols, precautionary measures; Workplace Label: includes product identifier, basic hazard information
- Structure of WHMIS Labels: Product Identifier: name or code allowing product identification; Hazard Symbols: pictograms indicating types of hazards; Precautionary Measures: information on safe handling, storage, disposal.
Learn about the definitions of independent, dependent, and controlled variables in research studies, along with examples. Understand the roles these variables play in experiments.
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