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Chem I Unit

Chemistry I Unit Test

QuestionAnswer
Earth's (1)____ is made up of several layers. The air we breathe makes up the lowest level. This layer is called the (2)____. The next layer up is called the (3)____. This level contains a protective (4)____ layer. (1) Atmosphere (2) Troposphere (3) Stratosphere (4) Ozone
Ozone forms when (5)____ is struck by ultraviolet radiation in the upper part of the stratosphere. The ozone forms a layer around Earth, which absorbs (6)____. (5) Oxygen gas (6) Ultraviolet Radiation
The thinning of the ozone layer, called the (7)____, is worrisome because without ozone all organisms on Earth are subject to harm from too much radiation. (7) Ozone hole
(T/F) CFC is another name for a chlorofluorocarbon. True
(T/F) CFCs are made up of carbon, fluorine, and cesium. False (Chlorine, Fluorine, and Carbon)
All CFCs are synthetic chemicals. True
(T/F)CFCs usually react readily with other chemicals. False
(T/F)CFCs were developed as replacements for toxic refrigerants. True
Chemistry the study of matter and the changes that it undergoes.
Matter anything that has mass and takes up space.
Mass is a measurement that reflects the amount of matter.
Radio, Car, Flash Light, Textbook, Human Body, Air Made of Matter
Feeling, Light, Magnetic Field, Radio Wave, Thought, Heat Not made of Matter
The mass of an object can very with the object's location. False
A mass measurement includes the effect of Earth's gravitational pull on the object being measured. False
Scientists measure the amount of matter in terms of mass. True
Subtle differences in weight exist at different locations on Earth. True
Your mass on the Moon would be smaller than your mass on Earth. False
The study of the matter and processes of living things. Biochemistry
The study of carbon-containing chemicals. Organinic Chemistry
The study of the components and composition of substances. Analytical Chemistry
The study of matter that does not contain organic chemicals. Inorganic Chemistry
The study of the behavior and changes of matter and the related energy changes. Physical Chemistry
Reaction rates; Behavior and changes of matter. Physical Chemistry
Minerals, metals, semiconductors, NO carbon. Inorganic Chemistry
PHarmaceuticals; carbon containing chemicals. Organic Chemistry
Metabolism; processes of living organisms. Biochemistry
Food nutrients; composition of substances. Analytical Chemistry
*Testable statement or prediction. (chart) Hypothesis (chart)
____, _____, Revised Hypothesis. (chart) (1)Experiments, (2)Conclusions (chart)
*Hypothesis supported by many experiments. (chart) Theory (chart)
*facts of nature accepted as truth. (chart) Scientific Law (chart)
Refers to physical characteristics such as color, odor, or shape. Qualitative Data
Refers to mass, volume, and temperature measurements. Quantitative Data
A variable controlled by the experimenter. Independent Variable
The act of gathering information. Observation
Changes in value based on the value of the controlled variable. Dependent Variable
A constant is a factor that- is not allowed to change during an experiment.
A control is a- standard for comparison.
A hypothesis is a(n)- tentative explanation of observations.
A theory is a(n)- explanation supported by many experiments.
A model is a(n)- visual, verbal, and/or mathematical explanation of how things occur.
Molina and Rowland used a (model, scientific method) to learn about CFCs in the atmosphere. Scientific Method
Their hypothesis was that CFCs break down in the stratosphere due to interactions with (ultraviolet light, oxygen). Ultraviolet Light
Molina and Rowland thought that these interactions produced a chemical that could break down (chlorine, ozone). Ozone
To test their (data, hypothesis), Molina Rowland examined interactions that occur in the stratosphere. Hypothesis
Based on their data, Molina and Rowland developed a (hypothesis, model) that explained how CFCs destroy ozone. Model
Molina and Rowland concluded that (chlorine, radiation) formed by the breakdown of CFCs in the stratosphere reacts with ozone and destroys it. Chorine
(A/P) Is undertaken to solve a specific problem. Applied Research
(A/P) Seeks to gain knowledge for the sake of knowledge itself. Pure Research
(A/P) Is used to find CFC replacement. Applied Research
(A/P) Was conducted by Molina and Rowland. Pure Research
When should you read the label on a chemical container? When picked up, in hand, and put down.
What do scientists usually do when a scientific problem first arises? They research to see what research has been done already on that problem.
What kinds of clothing should not be worn in the lab? loose, draping clothing; dangling jewelry; open-toe shoes.
What is technology? practical use of scientific information.
Which type of research would you be more interested in working in-pure research or applied research? Why? Applied research; to find a solution for people in need, like finding a cure for diabetes.
Macroscopic vs Submicroscopic (in your own words) The macroscopic world can be seen with the naked eye. Submicroscopic makes up the microscopic. Chemists want to understand the submicroscopic, so they can understand the microscopic.
Relationship between CFCs and the DEPLETION of OZONE. (in your own words) Ultraviolet radiation breaks down CFCs. The CFCs chlorine causes ozone depletion.
Effects of ozone hole on humans and other organisms. Cataracts and skin cancer in humans. Lower crop yields in agriculture. Disrupted food chains in nature.
Safety precautions before entering the LAB. Study lab assignments. avoid loose clothing and dangling jewelry. long hair tied back. No open-toe shoes.
Created by: jepva
 

 



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