Bio Lab Quiz 1
5 Types of Graphs
Bar Graph Line Graph Pie Chart Pictograph Table
Control
Baseline of your experiment
Dependent Variable
The variable that is observed or measured in the experiment.
Castes of termites and their traits
*1) Reproductive* Have wings and eyes *2) Soldiers* Have specialized head and jaw structures for defense *3) Workers* Sterile and blind. They forage and build mounds
*Observation*: The main purpose of washing hands with soap is to cleanse the hands of pathogens (bacteria). *Hypothesis*: If I wash my hands with a certain amount of soap, then there will be less bacteria on my hands. *Design an experiment based on this hypothesis:* 1. What is the independent variable? 2. What is the dependent variable? 3. How would you operationally define the variables? 4. What would be a positive control? 5. What would be a negative control?
*What is the independent variable?* ▹Soap *What is the dependent variable?* ▹Bacteria. *How would you operationally define the variables?* ▹Soap - pumps, mL, drops, etc. ▹Bacteria- colonies or concentration *What would be a positive control?* ▹Washing your hands with Ethanol (bacterial will die for sure). *What would be a negative control?* ▹Washing your hands only with water (bacteria will still on your hands)
5 factors that could affect seed germination
-Light -Temperature -Water availability -Nutrients/Soil content/Acidity/fertilizer -Seed coat
Embryo
A It is the baby plant
Pheremone
A chemical released by one animal that affects the behavior of another animal of the same species.
Positive Control
A control group that is not exposed to the experimental treatment but is known to produce the results
Variable
Any factor, trait or condition that can exist in different amounts or types
Endosperm
B Surrounds embryo and provides nourishment particularly starches.
Seed Coat
C the hard outer layer of seed and protects the seed
Operational Definition
Describes exactly what the variables are and how exactly the variables are measured in the experiment. ex- human intelligence may be operationally defined as what an intelligence test measures
Negative Control
Negative control is a part of well defined scientific experiment. A negative control group is a group in which no response is expected.
Steps of the Scientific Method
Question Hypothesize Experiment Record Analyze Share (Quality Humans Expect Really Awesome Soup)
Independent Variable
The variable that is manipulated or changed by the scientist.
Why is data analysis important (2)
To filter meaningful data from very large data sets Remove bias
When to use pie chart
To show data as percentage of the whole
When to use bar graph
When the Independent Variable is qualitative Used for comparisons between groups and categories of data
When to use Line graph
When the Independent and dependent Variable is quantitative Shows how data changes over time
What goes on the X and Y axis of line graphs
X axis- Independent Y axis- dependent
What goes on the X and Y axis of bar graphs
X axis- independent Y axis- dependent
Seed
an embryonic plant enclosed in a protective outer covering.
Where are pheremones released on termites
under the bellies
