Intro To Chemistry

Question 1

Earth’s ___________ is made up of many layers.

Answer 1

ATMOSPHERE

Question 2

What is the lowest level in the atmosphere called ?

Answer 2

Troposphere

Question 3

What is the level next to the lowest in the atmosphere called ?

Answer 3

Stratosphere

Question 4

Stratosphere level contains what type of protective layer ?

Answer 4

Ozone layer.

Question 5

How does ozone form ?

Answer 5

Ozone forms when oxygen gas is struck by ultraviolet radiation in the upper part of the stratosphere

Question 6

What does an ozone layer absorb ?

Answer 6

Ultraviolet radiation

Question 7

What is the thinning of the ozone layer called ?

Answer 7

Ozone hole

Question 8

True or false?

CFC is another name for a chlorofluorocarbon

Answer 8

True

Question 9

True or false ?

CFCs are made up of carbon, fluorine, and cesium

Answer 9

False

Question 10

True or false ?

All CFCs are synthetic chemicals

Answer 10

True

Question 11

True or false ?

CFCs usually react readily with other chemicals

Answer 11

False

Question 12

True or false ?

CFCs were developed as replacements for toxic refrigerants

Answer 12

True

Question 13

Chemistry

Answer 13

Is the study of matter and the changes it under goes

Question 14

Matter

Answer 14

Is anything that has mass and takes up space

Question 15

Mass

Answer 15

Is a measurement that reflects the amount of matter

Question 16

Things made of matter are :

Answer 16

1. Car
2. Human body
3. Radio
4. Textbook

Question 17

Things not made of matter :

Answer 17

1. Magnetic field
2. Feeling
3. Heat
4. light

Question 18

True or false ?

The mass of an object can vary with the objects location

Answer 18

True

Question 19

True or false ?

The mass measurement includes the effect of earths gravitational pull on the objects being measured

Answer 19

False

Question 20

True or false ?

Scientist measure the amount of matter in terms of mass

Answer 20

True

Question 21

True or false ?

Subtle differences in weight exist at different locations on earth

Answer 21

False

Question 22

True or false ?

Your mass on the moon would be smaller that your mass on earth

Answer 22

True

Question 23

Biochemistry

Answer 23

The study of the matter and process of living things

Question 24

Organic chemistry

Answer 24

The study of carbon containing chemicals

Question 25

Analytical chemistry

Answer 25

The study of the components and compositions of substances

Question 26

Inorganic chemistry

Answer 26

The study of matter that does not captain organic chemicals

Question 27

Physical chemistry

Answer 27

The study of the behavior and changes of matter and the related energy changes

Question 28

Organic chemistry relates to :

Answer 28

Plastics

Question 29

Physical chemistry relates to :

Answer 29

Reaction mechanisms

Question 30

Biochemistry related to :

Answer 30

Metabolism

Question 31

Analytical chemistry relates to :

Answer 31

Quality control

Question 32

Inorganic chemistry relates to :

Answer 32

Minerals

Question 33

Macroscopic

Answer 33

Is visible to the naked eye

Question 34

Submicroscopic

Answer 34

Is too small to be seen by the naked eye

Question 35

Scientific method consist of :

Answer 35

``` Observations Hypothesis Experiments Conclusion Theory Scientific law ```

Question 36

Observation

Answer 36

The act of gathering information

Question 37

Qualitative data

Answer 37

Refers to physical characteristics such as color, odor or shape

Question 38

Quantitive data

Answer 38

Refers to mass, volume , and temperature measurements

Question 39

Independent variable

Answer 39

A variable controlled by the experimenter

Question 40

Dependent variable

Answer 40

Changes in value based on the value of the controlled variable

Question 41

A Constant

Answer 41

Is a factor that is not allowed to change during and experiment

Question 42

A control

Answer 42

Is a tentative explanation of observations

Question 43

A theory

Answer 43

Is an explanation supported by many experiments

Question 44

A model

Answer 44

Is a visual, verbal, and or mathematical explanation of how things occur

Question 45

Scientific method refers to

Answer 45

Molina and Rowland used a model to learn about CFCs in the atmosphere

Question 46

Ultraviolet light refers to

Answer 46

The hypothesis made that CFCs breakdown in the stratosphere due to interactions with so

Question 47

Molina and Rowland thought that these interactions produces a chemical that could break down

Answer 47

Ozone

Question 48

To test their ________ Molina and Rowland examined interactions that occur in the stratosphere

Answer 48

Hypothesis

Question 49

Based on their data, Molina and Rowland developed a _____ that explained how CFCs destroy ozone

Answer 49

Model

Question 50

Molina and Rowland concluded that __________ formed by the breakdown of CFCs in the stratosphere reacts with ozone and destroys it

Answer 50

Chlorine

Question 51

Applied research

Answer 51

Is undertaken to solve a specific problem Is used to find CFC replacements

Question 52

Pure research

Answer 52

Seeks to gain knowledge for sale of knowledge itself Was conducted by Molina and Rowland

Question 53

When should you read the label on a chemical container

Answer 53

Before removing content

Question 54

Technology

Answer 54

Is the practical use of scientific information