Ch 2 Section 1 Flashcards Preview

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Flashcards in Ch 2 Section 1 Deck (33):
1

The scientific method is a

Logical approach to solving problems by observing and collecting data, formulating hypotheses, testing hypotheses, and formulating theories that are supported by data

2

Observing is the use of the

Senses to obtain information

3

Observation often involves

Making measurements and collecting data

4

Data may be

Qualitative or quantitative in nature

5

Qualitative

Descriptive

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Quantitative

Numeric

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Experimenting involves carrying out a

Procedure under controlled conditions to make observations and collect data

8

To learn more about matter chemists study

Systems

9

A system is a

Specific portion of matter in a given region of space that had been selected for study during an experiment or observation

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When you observe a region in a test tube the

Test tube and its contents form a system

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When analyzing data scientists attempt to find

Relationships and patterns

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Generalizations are

Statements that apply to a range of information

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To make generalizations

Data are organized in tables and analyzed using statistics/ mathematical techniques, often with the aid of graphs and a computer

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Generalizations are used to

Develop hypotheses

15

A hypothesis is a

Testable statement that serves as a basis for making predictions and carrying out further experiments

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"Then" part of hypothesis =

Prediction that is basis for testing

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experimental conditions that remain constant are

Controls

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Any condition that changes is a

Variable

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Any change observed is typically because of the

Effects of the variable

20

If testing reveals that predictions are wrong

Hypothesis must be discarded or modified

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Scientific method is not a

Single fixed process

22

Observing involves

Collecting data
Measuring
Experimenting
Communicating

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Formulating hypotheses

Organizing and analyzing data
Classifying
Inferring
Predicting
Communicating

24

Testing

Predicting
Experimentation
Communicating
Collecting data
Measuring

25

Theorizing

Constructing models
Predicting
Communicating

26

Publish results

Communicating

27

When data supports hypothesis

Scientists try to explain the phenomena by constructing a model

28

Model

More than physical object
Explanation of how phenomena occur and how data or events are related

29

Models may be

Visual
Verbal
Mathematical

30

If a model successfully explains many phenomena it may

Become part of a theory

31

A theory is a

Broad generalization that explains a body of facts or phenomena

32

Theories are successful if they can

Predict the results of many new experiments

33

The process researchers use to carry out their investigations is called the

Scientific method