Scientific Method

Question 0

Chromatography

Answer 0

A test to separate pigments (pigment)

Put pigment above water line

Question 1

Alex Smith

Answer 1

Period 4

Question 2

Gel electrophoresis

Answer 2

A test to compare DNA or proteins
DNA is cut with enzymes then placed in wells
Small fragments fall to bottom of plate
Compare banding patterns to read

Question 3

Indicator

Answer 3

A chemical that changes color with another chemical
Example: iodine = Amber
Iodine + starch = blue/black

Question 4

Control group

Answer 4

“Normal” with medicine studies = placebo

Used for comparison

Question 5

Dependent Variable

Answer 5

What to measure to answer the research question
Put on y axis

“Amount of”
“Rate of”

Question 6

Hypothesis

Answer 6

Educated prediction

IF (we do this), then (this will happen)

Question 7

Independent Variable

Answer 7

One per experiment
One factor that you change

Category
“Type of”

Question 8

Placebo

Answer 8

Used for the control group in medicine studies

-Saline shot or sugar pill

Question 9

Sample size

Answer 9

• Large group of test subjects
• Must have a large sample size to have accurate and reliable data
  - Reduces affect of individual differences

Question 10

Theory

Answer 10

• A hypothesis that has supported many many many times

- Similar to a law but more complex understanding

Question 11

Compound Light Microscope

Answer 11

Magnifies translucent objects

Ex.) Skin cell

Question 12

Dichotomous Key

Answer 12

A chart that has 2 options to compare your subjects with.

Question 13

Dissection

Answer 13

When you cut open a subject to examine the inside

Question 14

Graduated Cylinder

Answer 14

A tube that You put your liquids in to measure mL

Question 15

Magnification

Answer 15

Enlarge the view of your specimen in a microscope

Question 16

Mass

Answer 16

The quantity of matter

Ex.) Grams

Question 17

Model

Answer 17

A representation of a concept that is difficult or impossible to view
Ex.) DNA Model

Question 18

Stain

Answer 18

Chemical used to enhance microscopic view of biological samples
Ex.) staining a skin cell so you can see it better

Question 19

Triple Beam Balance

Answer 19

Instrument used to find mass in grams

Ex.) finding the mass of a rock and moving the weights until the lines meet

Question 20

Volume

Answer 20

The space an object takes up

Ex.) mL of water is 23.5 mL

Question 21

Conclusion

Answer 21

Decision about the results

Ex.) 1 tsp of hatch fast makes the egg hatch the fastest

Question 22

Controlled experiment

Answer 22

Experiment where the only variation between 2 groups is deliberate
Ex.) one group takes the real medicine and the control group takes the placebo

Question 23

Data

Answer 23

Information gathered from experiment

Ex.) 10 books used 2 trees

Question 24

Observation

Answer 24

Data that is collected by the senses

Ex.) seeing if too much hatch fast makes the eggs crumble

Question 25

Bias

Answer 25

Belief that is influenced by assumptions

Ex.) hypothesis

Question 26

Inference

Answer 26

Conclusions based on observations

Ex.) to much hatch fast makes the eggs crumble

Question 27

Peer review

Answer 27

Several scientists Examine the details of an experiment.

Ex.) taking your experiment to a showroom so other scientist can examine what your work was

Question 28

Sample size

Answer 28

Number of subjects in an experiment

Ex.) going to the mall and asking 200 teens what their favorite store was.