Unit A Flashcards
Controlled experiment
manipulated variables is intentionally changed to determine its effect on responding variable
Example: 5 plants all have identical pots, seeds, all placed in a sunny window, equally watered, only have different types of soil and they are all being measured
Variables
measure and/or control in investigation
Example: Temperature, type of plant
Dependent variables
responding variable, depending on other variables
Example: possible colour changes
Independent variables
only one is changed in experiment
Example: food samples
Controlled variables
in a controlled experiment variable is constant ex. bean plant (chose that plant)
Negative control
no respond expected for the results
Example: Plant that grows in the dark, poorly
Positive control
a respond is expected for the results
Example: Plant in the sun
Hypothesis
predicted answer to your testable question with a theoretical explanation for your prediction
Example: If the patient takes all the prescription medication given by the doctor than the virus will be treated
Correlational studies
determine whether one variable is affecting another without purposely changing or controlling any of the variables. Variables change naturally
Example: height + weight (heavier people tend to be taller)
Controlled experiment
example of scientific inquiry which a manipulated variable is intentionally changed to determine its effect on responding variable. All other variables are controlled, and they are performed when the purpose isn to create, test or use a scientific concept
Example: You take five identical pots, bean seeds, same pot placement in a sunny window, water them equally but each with different types of soil, and they are being measured on the time it takes for seeds to sprout in each pot
Observational studies
study a natural phenomenon with the intention of gaining scientifically significant info to answer a question. Involving a subject or phenomenon in an unobtrusive or unstructured manner, no specific hypothesis.
Example: A study took random sample of adults and asked them about their bedtime habits. The data showed that people who drank a cup of tea before bedtime were more likely to go to sleep earlier than those who didn’t drink tea
Components of a light microscope
Ocular Lens Revolving Nosepiece Objective Lens Arm Diaphragm Coarse Adjustment Knob Condenser Lens Fine Adjustment Knob
Ocular Lens
LOCATION: top of microscope
FUNCTION: magnifying Len with a power usually of 10x
Revolving Nosepiece
LOCATION: Above the stage, connected to the ocular Len
FUNCTION: holds/turns objectives into viewing position
Objective Lens
LOCATION: Above stage
FUNCTION: contains lens with different power ex. 4x, 10x, 40x, or low, medium, and high power
