H Bio Quiz 1

biology

biology

the study of life

characteristics of living beings

-Made of one or more cells

-Can grow/develop

-Requires an energy source

-Gas exchange occurs

-Has the potential to reproduce

-Contains genetic information

-Reacts to stimuli

-The species can adapt/evolve over time

ocular lens

microscope eyepiece

coarse focus

adjusts the location of the stage

fine focus

refines the view through the lens

nosepiece

the piece to move to switch objective lenses

objective lenses

the three lenses with various magnifications on a microscope

natural magnification of the microscope

10x, so when you use an objective lens it takes the magnification of the objective lens and makes it x10

magnification of red objective lens

4x

magnification of yellow objective lens

10x

magnification of blue objective lens

40x

specimen stage

the area where the specimen sits

stage controls

two knobs that allow you to adjust the positioning of the stage (forward, backward, right, left)

stage clips

clip the specimen into place

control group

cultivated under normal conditions; sees if the experiment is functioning properly

experimental group

cultivated under the same conditions as the control group while changing one variable

independent variable

the variable that is changed in the experimental group

dependent variable

the variable affected (and measured) in the experiment

controlled variable

a variable that does not change from the control to the experimental groups

correlation

a relationship between two variables that may change together over time BUT won’t be connected by cause and effect

causation

the change in one variable will cause the value of another variable to

change (cause and effect)

quantitative data

involves numbers (more likely to be objective truths, as long as the

tools are being used correctly)

qualitative data

involves descriptions/adjectives (more likely to be subjective…could involve bias) - it’s not this data isn’t needed or valued, it’s just not typically the main dependent variable being measured

graphing experiment results

x-axis = dependent variable; y-axis = independent variable

theory

a coherent group of propositions formulated to explain a group of facts or phenomena in the natural world and repeatedly confirmed through experimentation and/or observation

law

statement, based on repeated experiments or observations, that accurately describes or predicts a range of natural phenomena

hypothesis

a supposition or proposed explanation made on the basis of limited evidence as a starting point for further investigation