Chemistry capter 1

Chemistry

The study of the properties of matter and how matter changes

Ozone

a substabce in the atmosphere made up of oxygen 03

How is ozone formed?

oxygen gas (O2) joins with free oxygen (O) in the upper atmosphere to produce O3 (ozone)

chlorofluorocarbons

group of chemical compounds used in refrigerators, air conditioners, foam packaging, and aerosol sprays that may enter the atmosphere and destroy ozone

T or F CFC are nontoxic and stable

T

substance

matter that has a definite and uniform composition

Matter

Anything that has mass and takes up space

Mass

the amount of matter in an object

Weight

A measure of the force of gravity on an object

T or F mass changes and weight stays the same

F weight can change while mass cannot

Can you determine the speed and time of an electron

No because atoms never stop moving

the lowest level of the atmosphere

Troposphere containing airplains and the air we breath

Stratosphere

The second-lowest layer of Earth's atmosphere. containing ozone

Mesosphere

3rd layer of the atmosphere

what does the ozone layer absorb

UV

thining of the ozone layer

Ozone whole

What is CFC made out of

chlorine, carbon, and flourine

T or F all CFC are sythic chemical

True

t/f cfc usually react redily with other chemicals

false

What is normal amout of ozone units that is supposed to be in the ozone layer

300 dobson units

organic chemistry

most carbon-containing chemicals

inorganic chemistry

in general, matter that does not contain carbon

physical chemistry

the study of the properties and changes of matter and their relation to energy

analytical chemistry

components and composition of substances

biochemistry

matter and processes of living organisms

enviormental chemistry

matter and the enviorment

Industrial Chemistry

chemical processes in industry

polymer chemistry

polymers and plastics

theoretical chemistry

chemical interactions

Thermochemistry

heat involved un chemical processes

scientific method

A series of steps followed to solve problems including collecting data, formulating a hypothesis, testing the hypothesis, and stating conclusions.

qualitative data

descriptive data

Quantative data

numerical data

Hypothesis

a tentative, testable statement or prediction about what has been observed

experiment

a set of controlled observations that test the hypothesis

independant variable

the thing that will be changed in each experiment

dependent variable

The outcome factor; the variable that may change in response to manipulations of the independent variable.

control group

the group that does not receive the experimental treatment.

constant group

the part that doesn't change during the experiment

Theory

explanation of a natural phenomenon based on many observations and investigations over time

scientific law

a relationship in nature that is supported by many experiments

pure research

to gain knowledge for the sake of knowledge itself

applied research

scientific study that aims to solve practical problems

NOAA

National Oceanic and Atmospheric Administration

Montreal Protocol

phase out of ozone depleting substances.

nylon

Less expensive than silk for making hosiery