4.2
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Evidence generated through experimentation
empirical evidence
The conditions in an experiment that may be changed or manipulated
variables
A substance with no medicinal effect that can be used as a control in an experiment
Placebo
The condition that is manipulated or changed in an experiment
independent variable
The condition that is kept the same in an experiment
controlled variable
Researchers conducted an experiment on the effects of a new anti-mold product. Which of the following is the dependent variable that should be measured to establish an effect in this experiment?
Amount of mold growth The amount of mold growth is the dependent variable. This variable should be measured to determine the effect of the new anti-mold product.
Write three to five sentences describing the possible sequence of events of how the human body responds to high temperatures.
When your body temperature increases above 37°C (98.6°F), nerve cells send a signal to the brain. The brain then sends a signal to your sweat glands and you begin sweating. The perspiration helps to cool the skin, resulting in lowered body temperatures.
An informed guess about a causal relationship that is generated by observation and initial data collection
hypothesis
A prediction of what will occur in an experiment based on previous research
scientific hypothesis