Bio Lab 1
Indicate which of the following should be done to properly clean and store the microscope. Select all that apply.
- Light dimmer on lowest setting. - Stage lowered. - Lowest power objective in place. -Lenses cleaned with lens paper.
10x objective x 10x eye piece =
100x
Homework that was due on the day of an excused absence is then due within
24 hours of the missed lab
Hypothesis
A testable prediction, often implied by a theory; possible answer or solution to a question or problem
Which of the following would be considered a violation of the University's Academic Integrity Policy? (Check all that apply)
A. Using your roommate's completed Lab Manual from a previous semester to complete assignments. B. Giving your lab partner your manual to copy two answers C. Discussing your conclusions about an experiment based on your data with your classmates. D. Studying with a student who is an another instructor's class Answer: (A, B)
experimental group
In an experiment, the group that is exposed to the treatment, that is, to one version of the independent variable.
taxis
Movement toward or away from a stimulus.
Sowbug
Terrestrial crustaceans found in damp moist places; help turn rotting materials into soil and release nutrients; have an exoskeleton
scientific inquiry
The diverse ways in which scientists study the natural world and propose explanations based on evidence they gather.
True or False: All lab organisms should be treated as potentially dangerous
True
True or False: sowbug and pillbug are arthropods
Ture
Dropping a cover slip over a specimen at an angle instead of just placing it directly on top helps to prevent the inclusion of ______
bubbles
primary peer-reviewed sources
by scientists for consumption by scientists for the advancement of science
line graphs
depict trends in data at equal intervals
Accumulating ________ unexcused absences will result in a failing grade.
more than 2
Indicate which of the following supplies you will need for lab this semester. Select all that apply.
- Tape measure (at least 3 meters long) - Computer with a webcam for taking exams in lockdown browser with monitor - Calculator capable of addition, subtraction, multiplication, division, and square roots - One package of wooden colored toothpicks and 1 package of natural colored toothpicks that are the same size and shape OR small colored candies OR other objects
What is the advantage of using a wet mount?
- The motility of a specimen can be viewed under a microscope. -The specimen can be viewed as living cells.
Each of the following steps are necessary in preparing and observing a wet mount. Place the steps in the correct order.
1. Obtain a clean slide and cover slip. 2. Using a transfer pipette, obtain a drop of specimen and place onto the center of the slide. 3. Carefully place the cover slip over the drop of specimen. 4. Observe preparation under the 10X objective lens. 5.Observe preparation under the 40X objective lens.
40 x objective x 10x eyepiece
400x
4x objective x 10x eyepiece =
40x
Magnification
An increase in the apparent size of an object
bar graphs
Charts that represent information using a series of vertical or horizontal bars;
True or False: Paper towels are appropriate to clean all components of compound light microscopes.
False
True or False: If you know about an upcoming absence, then you must notify your instructor and make arrangements with them at least a week before you expect to miss class in order for your absence to be considered excused.
True
Law
a generalization that describes recurring facts or events in nature ex. gravity law
pie charts
a graph in which a circle is divided into sectors that each represent a portion of the whole.
Scatterplot
a graphed cluster of dots, each of which represents the values of two variables
dissecting microscope
allows examination of organisms or objects large enough to be visibly detected without magnification, but too small to see fine surface details or features; shines light onto an object, lesser magnification, views as a whole not sections
Theory
explains a law by providing an explanation for how or why that pattern occurs in nature
experimental variable (independent variable (xaxis) )
factor of the experiment being tested
alternative hypothesis
hypothesis supporting the other possible outcome for an experiment
null hypothesis
hypothesis that claims that the experimental variable had no effect
microscope
instrument to see objects that are too small to be seen by the naked eye
kinesis
is a random movement that is not oriented in a certain way w/ regard to stimulus
The hypothesis after the experiment could develop into either
law or theory
What should be used to clean the optical surfaces (lenses) of a microscope?
lens paper
compound light microscope
microscope that allows light to pass through a specimen and uses two lenses to form an image; greater magnification, higher resolution
Scientific Method
observation, question, hypothesis, prediction, experiment
total magnification
ocular lens x objective lens; power of the eyepiece (10x) multiplied by objective lenses determines total magnification
Slides should always be prepared _____.
on a paper towel that is on a flat surface; but not on your lab manual because then you can't read it.
Resolution
shortest distance between two points on a specimen that can still be distinguished by the observer or camera system as separate entities
predictive hypothesis
states that the expected outcome of the relationship between the variable
To be of value to science hypotheses must be ___
testable and falsifiable
control group
the group that does not receive the experimental treatment
dependent variable (y-axis)
the response of the experimental group is dependent of the effect of the experimental variable or treatment
theory cannot turn into law; law can turn into
theory