Biology as a Science/Tools of a Biologist

Question 1

Why do we need the scientific method

Answer 1

It is a standard for scientific practices so we can be assured that everyone put in as much work as whats needed

Question 2

Steps of the Scientific Method

Answer 2

1. define the problem
2. make a hypothesis
3. test your hypothesis
4. collect data
5. analyze data and make a conclusion
6. publish your experiment

Question 3

Control Group

Answer 3

A standard set of data to compare your experiment to (ex. watering plants with water when experimenting with different liquids)

Question 4

Positive Control Group

Answer 4

Something you know will already work better than standard

Question 5

Experimental Group

Answer 5

The thing you are experimenting on

Question 6

Negative Control

Answer 6

Something you know will work because it was always done that way but it doesn’t work as best as it could work

Question 7

Variable

Answer 7

The thing that changes throughout the experiment

Question 8

Independent Variable

Answer 8

The number varies but you control it

Question 9

Dependant Variable

Answer 9

The number changes but nature controls it (your data)

Question 10

Null Hypothesis

Answer 10

When no difference exists in the experimental group and the control group

Question 11

Theory

Answer 11

An explanation for many different observations and explains may hypothesises but is not always true

Question 12

Law

Answer 12

Something that it always true and has been seen over and over and over (law of gravity)

Question 13

Meter to Micron/Micrometer

Answer 13

X 1,000,000

Question 14

Meter to Millimeter

Answer 14

X 1,000

Question 15

Meter to Centimeter

Answer 15

X 100

Question 16

Kilometer to Meter

Answer 16

X 1,000

Question 17

Antony Van Leeuwenhoek

Answer 17

“Invented” but really just improved single lense microscope

Question 18

Hans and Zaccharias Janssen

Answer 18

They were the ones who REALLY invented the single lense microscope, not Leeuwenhoek

Question 19

Robert Hooke

Answer 19

Invented the compound microscope

Question 20

How to Find the Magnification of Your Microscope

Answer 20

Multiply the objective and the eyepiece magnification

Question 21

Vital Stains

Answer 21

Do not harm live creatures, just stain them

Question 22

Lethal Stains

Answer 22

Kills the specimin

Question 23

Dissecting Scope/Zoom Scope

Answer 23

Allows you to view larger objects in 3D

Question 24

Phase-Contrast Microscope

Answer 24

You don’t need a stain

Question 25

Scanning Electron Microscope

Answer 25

100,000X magnification and is not for large objects because it blasts electron at the object

Question 26

Transmission Electron Microscope

Answer 26

2D image at 250,000X, cannot view living things, blasts electrons at objects

Question 27

Centrifuge

Answer 27

Spins so fast that mixtures are separated based on density

Question 28

Chromatography

Answer 28

It separates the components of the thing tested based on solubility (ex. black markers)

Question 29

Spectrophotometry

Answer 29

Using light absorbance to determines subjects concentration

Question 30

Electrophoresis

Answer 30

Separates mixtures based apon size and charge in a gel-like substance