LAB 3 - Scientific Investigation I Flashcards
What are the first 5 steps of the scientific method?
- Make an observation
- Ask a question
- Hypothesis
- Design Experiment (procedure)
- Prediction
What are the 2 qualities of a hypothesis?
- testable
- falsifiable
(cannot be proven)
What are 3 characteristics of variables?
- clearly defined
- measurable
- controllable
What is a dependent variable?
-what is being measured in the experiment in response to the exp. conditions
What is the independent variable?
- experimental conditions
- “treatments”
What are controlled variables?
-independent variables that are being kept constant during the experiment
What are the 3 characteristics of a good experimental procedure?
- level of treatment
- replication
- control treatment
What is the point of control variables?
show whether the predicted effect is really due to the independent variable
What is the format of a prediction?
If ______ is true, then _____ will happen because ______
In the experiment ______ was tested as a possible pest control
different concentrations of sunflower oil
What was the organism used in the lab (written about for lab reports)
Bean Beetle
Callosobruchus maculatas
How can you tell the difference between a male and female Callosobruchus maculatus?
Males: round, lighter brown
Females: longer/oval, dark brown/black
We also tested the effect of ______ on ______ and ______ population growth
- effect of Hydra
- Daphnia and Simocephalus
What where in the 4 quadrants of the bean beetles experiment?
A. 10 regular beans
B. 10 beans covered in 5ml sunflower oil
C. nothing
D. 10 beans covered in 10ml sunflower oil
What was the algal culture used?
green alga Scenedesmus
