Measurement, Precision, and Accuracy

Question 1

Qualitative 2 things

Answer 1

• Involves 5 senses
• Written as adj. (hot, light, fuzzy)

Question 2

Quantitative 2 things

Answer 2

• Involves measurement or numbers
• counting

Question 3

What does quantitative data often include?

Answer 3

statistics
numerical data
scientific experiments
surveys
organized observations

Question 4

Qualitative data often includes these 3 things

Answer 4

• open-ended interviews
• case studies
• lose observations

Question 5

Compare and contrast qualitative and quantitative data.

Answer 5

Quantative

-objective
-concrete
- measured

Qualitative

• Subjective
• Interpretive
• Descriptive

Question 6

What does the accuracy of your data depend on?

Answer 6

the reliability of the tool you are using and the tool reading that tool.

Question 7

The area is measured in

Answer 7

M^2

CM^2

km^2

Question 8

Formula for Area

Answer 8

Length x Width

Question 9

Volume is measured in

Answer 9

Liquids- Liters or Milliliters (mL)

Solids- M^3 CM^3

Question 10

Formula for volume

Answer 10

V= Length x Width x Height

Question 11

The formula for density is

Answer 11

Density= Mass/Volume

Question 12

1 cm^3=

Answer 12

1 mL

Question 13

def of Accuracy

Answer 13

How close measurement is to true value

Question 14

def. of Precision

Answer 14

how close measurements are to each other

Question 15

def. of Significant Figures

Answer 15

These are all the digits known to us from our measuring tools plus one additional estimated digit

Question 16

What is the def. of a scientific model

Answer 16

A representation of a system of ideas, events, or processes

Question 17

what are the 3 types of scientific models

Answer 17

• Conceptual
• Mathematical
  -Physical

Question 18

Physical scientific model def.

Answer 18

smaller and larger of the things being studied

Question 19

Mathematical scientific model def.

Answer 19

sets of data that consider many factors to represent a phenomenon usually done on a computer

Question 20

Conceptual scientific model def.

Answer 20

tie together ideas to explain a phenomenon or event

Question 21

Benefits of scientific models

Answer 21

• Better understanding of things we cannot normally see (too big like a solar system or too small like a cell)
• give us an understanding of phenomena
• helps us to notice patterns

Question 22

Limitations of scientific models

Answer 22

-things that make the model not completely accurate

• No model can possibly explain every detail of scientific phenomena
  (sometimes oversimplified like photosynthesis)

Question 23

What are the 3 types of investigations

Answer 23

Descriptive (identifying)

Comparative (compare and contrast)

Experimental (scientific method)

Question 24

Independent variable def.

Answer 24

What you change in an experiment

Question 25

Dependent variable def.

Answer 25

Response to what you are changing

Question 26

Control Group def.

Answer 26

The group in a lab for comparison

Question 27

Why is a control group important

Answer 27

to see if IV is truly having an impact

Question 28

Difference between laws and theories + example

Answer 28

theory- explnations and observations built on knowledge from experiments. Based on time/they can also change over time (Big Bang)

law - a rule that is known in science and describes a pattern in nature. / not why something happen just what happens (law of conservation of energy)

Question 29

How do you find an independent and dependent variable in a hypothesis?

Answer 29

If IV, then DV

Question 30

What makes a hypothesis valid

Answer 30

It must be testable and include IV then DV format

Question 31

what are constants

Answer 31

things that are the same in an experiment

Question 32

Which of the three types of investigations must have a hypothesis, an independent variable, and a dependent variable?

Answer 32

Experimental

Question 33

What are the 3 different types of models + example

Answer 33

Mathematical- chart or weather map

Physical-cell model or globe

Conceptual- Water cycle

Question 34

2 limitations of models

Answer 34

1. Can’t act or behave like the real thing
2. sometimes oversimplified

Question 35

3 benefits of models

Answer 35

• Better understanding of things we cannot normally see

-helps us to notice patterns

-gives us an understanding of phenomena

Question 36

In science, we use line graphs quite often. In a line graph, we do not connect the dots. Instead, we use
____________

Answer 36

Line of best fit

Question 37

Practice finding variables from experiments

Answer 37

yesyeysyeysyesyeysyse

Question 38

know how to make a graph ( look in notes)

Answer 38

ok