Intro To Chemistry Flashcards
Earth’s ___________ is made up of many layers.
ATMOSPHERE
What is the lowest level in the atmosphere called ?
Troposphere
What is the level next to the lowest in the atmosphere called ?
Stratosphere
Stratosphere level contains what type of protective layer ?
Ozone layer.
How does ozone form ?
Ozone forms when oxygen gas is struck by ultraviolet radiation in the upper part of the stratosphere
What does an ozone layer absorb ?
Ultraviolet radiation
What is the thinning of the ozone layer called ?
Ozone hole
True or false?
CFC is another name for a chlorofluorocarbon
True
True or false ?
CFCs are made up of carbon, fluorine, and cesium
False
True or false ?
All CFCs are synthetic chemicals
True
True or false ?
CFCs usually react readily with other chemicals
False
True or false ?
CFCs were developed as replacements for toxic refrigerants
True
Chemistry
Is the study of matter and the changes it under goes
Matter
Is anything that has mass and takes up space
Mass
Is a measurement that reflects the amount of matter
Things made of matter are :
- Car
- Human body
- Radio
- Textbook
Things not made of matter :
- Magnetic field
- Feeling
- Heat
- light
True or false ?
The mass of an object can vary with the objects location
True
True or false ?
The mass measurement includes the effect of earths gravitational pull on the objects being measured
False
True or false ?
Scientist measure the amount of matter in terms of mass
True
True or false ?
Subtle differences in weight exist at different locations on earth
False
True or false ?
Your mass on the moon would be smaller that your mass on earth
True
Biochemistry
The study of the matter and process of living things
Organic chemistry
The study of carbon containing chemicals
Analytical chemistry
The study of the components and compositions of substances
Inorganic chemistry
The study of matter that does not captain organic chemicals
Physical chemistry
The study of the behavior and changes of matter and the related energy changes
Organic chemistry relates to :
Plastics
Physical chemistry relates to :
Reaction mechanisms
Biochemistry related to :
Metabolism
Analytical chemistry relates to :
Quality control
Inorganic chemistry relates to :
Minerals
Macroscopic
Is visible to the naked eye
Submicroscopic
Is too small to be seen by the naked eye
Scientific method consist of :
Observations Hypothesis Experiments Conclusion Theory Scientific law
Observation
The act of gathering information
Qualitative data
Refers to physical characteristics such as color, odor or shape
Quantitive data
Refers to mass, volume , and temperature measurements
Independent variable
A variable controlled by the experimenter
Dependent variable
Changes in value based on the value of the controlled variable
A Constant
Is a factor that is not allowed to change during and experiment
A control
Is a tentative explanation of observations
A theory
Is an explanation supported by many experiments
A model
Is a visual, verbal, and or mathematical explanation of how things occur
Scientific method refers to
Molina and Rowland used a model to learn about CFCs in the atmosphere
Ultraviolet light refers to
The hypothesis made that CFCs breakdown in the stratosphere due to interactions with so
Molina and Rowland thought that these interactions produces a chemical that could break down
Ozone
To test their ________ Molina and Rowland examined interactions that occur in the stratosphere
Hypothesis
Based on their data, Molina and Rowland developed a _____ that explained how CFCs destroy ozone
Model
Molina and Rowland concluded that __________ formed by the breakdown of CFCs in the stratosphere reacts with ozone and destroys it
Chlorine
Applied research
Is undertaken to solve a specific problem
Is used to find CFC replacements
Pure research
Seeks to gain knowledge for sale of knowledge itself
Was conducted by Molina and Rowland
When should you read the label on a chemical container
Before removing content
Technology
Is the practical use of scientific information
