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