Characteristics of Life
Variables
Graphing
Lab Measurements
Lab Report Writing
100
What is Biology the Study of?
Life
100
What is a hypothesis, and the format including variable placement?
Hypothesis is a testable prediction based on observations (more than a guess) that often describes a cause and effect relationship between variables.
If (IV), then (DV).
100
What are the two axes on a graph? Name the axes and what direction they go.
X axes is horizontal
Y axes is vertical
100
Graduated Cylinder
100
What is the first portion of a lab report?
Introduction/Purpose
200
What is a stimulus?
Signal to which an organism responds
200
What is the independent variable?
What the experimenter will deliberately change or manipulate in the investigation (MIX)
200
What variable is graphed on the x-axis?
independent variable
(MIX- manipulated, independent, x-axis)
200
An Erlenmeyer Flask Measures What?
Volume
200
What is the difference between an observation and an inference?
Observation is a description of something you can see, smell, hear, touch, taste, not an opinion
Inference is a guess about an object based on your observations.
300
What is evolution?
Changes that occur over time throughout generations to organisms
300
What is the dependent variable?
What changes in response to the independent variable (DRY)
300
What variable is graphed on the y-axis?
Dependent variable
(DRY- dependent, response variable, y-axis)
300
A Beaker measures what?
volume
300
What is a Qualitative Observation?
Observation that describes qualities, words
Green liquid, large hole, sour taste, sweet smell
400
What is homeostasis?
The ability to maintain a stable environment
400
What is a constant?
Aspects of an experiment that are held constant/consistent
400
What section of your lab report should your graph be in?
Results Section
400
What piece of glassware is not used for making measurements?
Test Tube (remember you had to guess how much water based off of what was left in the beaker)
400
What is a Quantitative Observation?
Observation that uses numbers to measure something.
4 feet long, 6 legs, 7.2 grams, 100mL
500
What are the 8 characteristics of life?
Living Things....
1. Respond to their environment
2. Grow and Develop
3. Reproduce
4. Evolve
5. Maintain a stable internal environment
6. Obtain and use material and energy
7. Made of a cell or cells
8. Based on a universal Genetic code
500
What is a control group?
group used for comparison with your experimental group, it is the normal group
500
What are the 4 requirements for a graph to be complete?
1. Title
2. Axes have an appropriate scale
3. Axes are labeled (with units)
4. Graph itself (bar or line)
500
What would give the most precise measurement? A beaker, flask, test tube or graduated cylinder
graduated cylinder
500
What is the difference between precision and accuracy?
Precision is how close your measurements are to each other (think consistent or specific)
Accuracy is how close your measurement is to the correct/accepted value (think correct)