Basics of Chemistry

Question 1

What is Chemistry?

Answer 1

Chemistry is the branch of Science that studies matter, what it is, and how it changes.

Question 2

How do organic compounds differ from inorganic compounds?

Answer 2

Organic compounds contain carbon and hydrogen bonds. Most inorganic compounds do not contain carbon.

Question 3

Five basic areas of chemistry

Answer 3

Organic Chemistry
Inorganic Chemistry
Biochemistry
Physical Chemistry
Nuclear Chemistry

Question 4

Organic Chemistry

Answer 4

The study of carbon-containing compounds

Question 5

Inorganic Chemistry

Answer 5

study of everything except carbon-based compounds

Question 6

Biochemistry

Answer 6

chemistry of living things

Question 7

Physical Chemistry

Answer 7

study of chemical systems in terms of the principles of physics that are used to measure physical properties of substances.

Question 8

Nuclear Chemistry

Answer 8

study of radioactivity and the decay of atoms

Question 9

What are the two methods for investigation science?

Answer 9

Pure Science (through knowledge and facts)
Applied science ( using knowledge in a practical way)

Question 10

Name the basic steps of scientific inquiry

Answer 10

Ask a question
Background Research
Make a hypothesis
Test the hypothesis
Analyze results
Draw a conclusion
Share results
If the hypothesis is proven false, another step is to create a new hypothesis.

Question 11

What are models and why are they used in science?

Answer 11

Models are representations of the experiment or object that allows the scientist to easily observe and gather data

Question 12

Scientific theory

Answer 12

A theory is a scientists explanation of the facts, either measured or observed.

Question 13

Scientific Law

Answer 13

A law is a rule based on observation of a process in nature that behaves the same way, every single time

Question 14

Matter

Answer 14

anything that occupies space and has mass

Question 15

Scientific Inquiry

Answer 15

Process of using evidence from observation and experiments to create an explanation

Question 16

Scientific Method

Answer 16

a step-by-step method to answer a question and systematic way to check their work and the work of others.

Question 17

Pure Science

Answer 17

The search of knowledge or facts. It uses theories and predictions to understand nature.
ex: Geology

Question 18

Applied science

Answer 18

Using knowledge in a practical way.
Related to engineering and technology
ex: developing a rocket

Question 19

Types of Models

Answer 19

Physical Model
Computer Model
Mathematical Model

Question 20

Physical model

Answer 20

something that can be built
ex: molecule made out of marshmallows, gumdrops, and sticks

Question 21

Computer Model

Answer 21

A three-dimensional simulation of a moving object or a chemical reaction

Question 22

Mathematical Model

Answer 22

Calculations involving a particular mathematical equation
ex an equation of a line

Question 23

Theory

Answer 23

a proposed explanation that is based on an examination of facts

Describes WHY something happens

Question 24

Facts

Answer 24

can be observed and measured

Question 25

Law of Conservation of Mass

Answer 25

During a chemical reaction matter is neither created nor destroyed, just rearranged.

Question 26

Law

Answer 26

A rule based on observation of a process in nature that behaves the same way, each and every time Describes WHAT happened

Question 27

Lab Report Parts

Answer 27

Title Introduction/Purpose Hypothesis-Prediction Materials and Equipment Procedure Data/Results Conclusion/Evaluation

Question 28

Title

Answer 28

Tells the reader about the experiment or investigation

Question 29

Introduction/Purpose

Answer 29

Brief description of the question that is being asked or why the investigation is being done

Question 30

Hypothesis-Prediction

Answer 30

State specifically what you think will happen in the investigation and why

Question 31

Scientific Experiment Steps

Answer 31

observe Construct (hypothesis) Plan Predict Conduct Record Repeat

Question 32

Procedure

Answer 32

A step-by-step list of how to carry out the experiment

Question 33

Control

Answer 33

A trail during which all of the variables are unchanged. Used as the standard comparison of an experiment

Question 34

Constants

Answer 34

All of the variables in an experiment that remain the same

Question 35

Independent variable

Answer 35

the variable that is changed in an experiment

Question 36

Dependent variable

Answer 36

the variable that is influenced by the independent variable, the results of the experiment

Question 37

Variable

Answer 37

a factor that can alter the experiments results

Question 38

Accurate

Answer 38

How close the measured value is to a standard or known value

Question 39

Precise

Answer 39

How close two or more measure values are to one another

Question 40

What are the two ways that data can be measured?

Answer 40

Either quantitative or qualitative

Question 41

What graphs can be used to present data?

Answer 41

Line Bar Circle

Question 42

What is the difference between being accurate and being precise?

Answer 42

Accuracy is determined using the closeness of the value measured to the standard or known value. Precision is determined through the closeness of tow or more measured vales to each other.

Question 43

Why is it important to correctly analyze the date from an experiment?

Answer 43

So that it can the results can be compared to multiple experiments if needed

Question 44

You have collected date that shows a large changes during a period of time. What type of graph would you use for this?

Answer 44

A bar graph

Question 45

When would you use a line graph?

Answer 45

If the data shows small changes over time