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