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B7: Practical Skills
7.1 Practical Activity Skills
7.1.1 Planning Experiments
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Cards (36)
A good hypothesis should be specific,
testable
, and measurable.
True
Controlling control variables ensures the
validity
of the experiment.
A null hypothesis predicts that there is no
relationship
between variables.
True
Match the variable type with its definition:
Independent Variable ↔️ Manipulated by the researcher
Dependent Variable ↔️ Measured as a result of the independent variable
Control Variable ↔️ Kept constant to isolate the independent variable
The independent variable is manipulated or changed by the
researcher
What are some common tools used for quantitative data collection?
Rulers, stopwatches, scales
Match the characteristic of a research question with its example:
Specific ↔️ How does fertilizer X affect sunflower plants?
Measurable ↔️ Does light influence plant height?
Testable ↔️ Will light intensity affect plant growth?
The null hypothesis proposes that there is no relationship between
variables
.
True
What is the primary goal of designing an experimental procedure?
Maintain experiment's validity
What is the purpose of control variables in an experiment?
Isolate independent variable
What are the three types of variables identified in experimental design?
Independent, dependent, control
Quantitative data involves numerical measurements that can be statistically
analyzed
Controlling control variables ensures that the results can be attributed to the
independent
variable alone.
The research question provides a clear focus for the experiment and ensures the data collected is
meaningful
What is an example of a directional hypothesis for the research question "Does the amount of light affect plant growth?"
Increasing light increases height
What are the characteristics of a good research question?
Specific, measurable, testable
The independent variable is the variable that is manipulated or changed by the
researcher
.
Match the type of data with its definition:
Quantitative data ↔️ Numerical measurements
Qualitative data ↔️ Observations and descriptions
A good research question is specific,
measurable
, and testable.
True
There are two main types of hypotheses: directional and
null
What is the first step in designing an experimental procedure?
Identify independent variable
The
dependent variable
is the variable that is measured or observed in an experiment.
True
When designing an experiment, safety and ethical considerations are crucial to mitigate potential
risks
What are the two main types of data collected in experiments?
Quantitative and qualitative
Why is it important to develop controls in an experimental procedure?
Ensure experiment's validity
Match the hypothesis type with its description:
Directional Hypothesis ↔️ Predicts the specific direction of the relationship
Null Hypothesis ↔️ Predicts no relationship between variables
What are the three main types of experimental variables?
Independent, dependent, control
Control variables are kept constant to isolate the effect of the
independent variable
.
True
Quantitative data can be analyzed
statistically
What is a hypothesis in experimental design?
A testable statement
Steps in designing an experimental procedure:
1️⃣ Identify independent variable
2️⃣ Determine dependent variable
3️⃣ List control variables
4️⃣ Choose data collection methods
5️⃣ Decide sample size and trials
The independent variable is the variable that the researcher
manipulates
Steps in designing an experimental procedure
1️⃣ Identify Independent Variable
2️⃣ Determine Dependent Variable
3️⃣ List Control Variables
4️⃣ Choose Data Collection Methods
5️⃣ Decide Sample Size and Trials
6️⃣ Consider Safety and Ethics
Match the variable type with its definition:
Independent Variable ↔️ Manipulated by the researcher
Dependent Variable ↔️ Measured or observed
Control Variables ↔️ Kept constant to isolate IV
Control variables must be kept consistent to ensure the
validity
of the experiment.
True
What safety measures should be considered when handling plant waste in an experiment?
Proper disposal in compost bin
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