Term
| T/F: The transformation of a liquid to a solid requires the addition of heat energy |
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Definition
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Term
| T/F: Density is defined as the volume per unit mass |
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Definition
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Term
| T/F: When water freezes for a given mass or weight it occupies more volume |
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Definition
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Term
| T/F: Covalent chemical bonds between atoms involve sharing a pair of electrons in their valence shell |
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Definition
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Term
| T/F: A nucleus in an atom is a small, dense region in the center of an atom which is composed of electrons and protons |
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Definition
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Term
| T/F: Valence electrons in elements in a chemical family or group can be identified by their A number in the periodic chart |
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Definition
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Term
| T/F: Infared (IR) energy is absorbed by molecules by changing their modes of vibration |
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Definition
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Term
| T/F: The ozone layer is made up of oxygen, nitrogen and carbon dioxide and is located in the lower portion of the Stratosphere |
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Definition
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Term
| T/F: Ultraviolet (UV) and visible light energy come from valence electron transitions within atoms and molecules |
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Definition
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Term
| T/F: An element is identified by the number of protons in its nucleus |
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Definition
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Term
| T/F: A hypothesis is a comprehensive idea that has been extensively tested |
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Definition
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Term
| T/F: Liquid water has its greatest density at 4 degrees centigrade |
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Definition
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Term
| T/F: Ice does not float in room temperature water |
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Definition
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Term
| T/F: The first step in treating sewage is to introduce aerobic bacteria |
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Definition
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Term
| T/F: Microwave radiation is more energetic than visible light radiation |
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Definition
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Term
| T/F: The Troposphere contains ozone which filters out 95% of the UV radiation |
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Definition
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Term
| T/F: Chlorine atoms are the component of CFC that ultimately damages ozone |
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Definition
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Term
| T/F: The specific heat of a material is a measurement of its heat energy storage capacity |
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Definition
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Term
| T/F: Hydrogen bonds are partial electrostatic forces that bond water in the liquid and solid phases |
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Definition
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Term
| T/F: Acid rain can come from sulfur dioxide and nitrogen dioxide reacting with water in the atmosphere |
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Definition
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Term
| T/F: Visible light can be converted to IR or heat radiation when absorbed by soil |
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Definition
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Term
| T/F: IN the Stratosphere chlorine atoms can react with ozone to produce chlorine monoxide and oxygen |
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Definition
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Term
| T/F: Normal rainwater is acidic due to its reaction with carbon dioxide in the air |
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Definition
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Term
| T/F: Ozone is produced in the Troposphere by the reaction of nitrogen dioxide, VOC (volatile organic compounds; e.g. gasoline vapors), oxygen and sunlight |
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Definition
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Term
| T/F: Sulfur dioxide can be removed from smoke stack emissions by introducing calcium carbonate to produce solid calcium salts and then buried under ground |
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Definition
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Term
| T/F: Aluminum ions produced from acid rain can prove harmful to fish and plant life |
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Definition
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Term
| T/F: Bottled water is regulated by EPA which insures the highest purity |
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Definition
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Term
| T/F: So called greenhouse gasses, like CO2 and CH4 trap IR radiation in the Troposphere which can result in an imbalance in light energy entering and leaving the earth's atmosphere |
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Definition
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Term
| T/F: Ozone in the Stratosphere absorbs UV light to produce oxygen molecules and oxygen atoms |
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Definition
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Term
| T/F: UV-C radiation has less energy than UV-A and therefore will not burn skin tissue |
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Definition
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Term
| In treating raw sewage what is the first step? |
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Definition
| Filtration of large solids |
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Term
| Carbon dioxide, methane, and water in the atmosphere are referred to as greenhouse gasses. what form of energy do they absorb? |
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Definition
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Term
| Aerobic bacteria require which one of the following to multiple? |
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Definition
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Term
| the earth's atmosphere consists of three layers, starting with the closest to the ground arrange them in order: 1. stratosphere 2. mesosphere 3. troposphere |
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Definition
| troposphere, stratosphere, mesosphere |
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Term
| In the secondary step of sewage water treatment what source is used to remove dissolved organic matter? |
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Definition
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Term
| what type of light energy produces chlorine atoms from chlorinated fluorocarbons? |
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Definition
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Term
| in the cyclic destruction and production of ozone in the upper atmosphere what form of light energy is involved in the first step of the process of breaking oxygen molecules into oxygen atoms? |
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Definition
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Term
| in order to maintain an average temperature on the earth's surface and avoid global warming or cooling what salient factor must happen? |
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Definition
| The entering energy from the sun must be EQUAL to the outgoing energy from the earth's surface |
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Term
| Water occupies a greater volume in its solid phase because: |
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Definition
| forms a hexagonal crystal structure |
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Term
| T/F: Methane can produce acid rain |
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Definition
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Term
| Liquid water has its greatest density at what temperature? a) 0 degress C b) 2 degress C c) 6 degrees C d) 10 degrees C e) none of the above |
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Definition
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Term
| The freezing point depression of a solution is: |
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Definition
| the result of adding a solute to a solvent |
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Term
| Ice crystals are held together by what type of bonding? |
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Definition
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Term
| the number of valence or outer shell electrons in an atom are identified in the periodic chart by: |
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Definition
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Term
| Responsible for regulating bottled drinking water? |
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Definition
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Term
| Anaerobic bacteria [does/does not require oxygen]? |
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Definition
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Term
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Definition
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Term
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Definition
| biochemical oxygen demand |
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Term
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Definition
| number of protons in the nucleus of an atom (element) |
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Term
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Definition
| an atom with a sarplus or deficiency of electrons; e.g. Na+, Cl |
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Term
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Definition
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Term
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Definition
| atoms held together by sharing a pair of electrons |
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Term
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Definition
| Biochemical Oxygen Demand |
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Term
| A carbon bond with a double bond to one oxygen atom, a single bond to another oxygen that is bonded to a carbon atom, and its fourth bond to another carbon atom |
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Definition
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Term
| a carbon atom with a double bond to an oxygen atom and single bonds to two other carbon atoms |
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Definition
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Term
| a carbon atom with a double bond to an oxygen atom, a single bond to a nitrogen atom, and a single bond to a carbon atom |
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Definition
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Term
| a double bond between two carbon atoms |
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Definition
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Term
| an oxygen atom with single bonds to two different carbon atoms |
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Definition
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Term
| T/F: Liquid water has its greatest density at 7 degrees C |
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Definition
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Term
| T/F: lice is more dense than liquid water |
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Definition
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Term
| T/F: hydrogen bonds hold liquid water together |
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Definition
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Term
| T/F: Anerobic bacteria require oxygen to survive |
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Definition
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Term
| T/F: Solubility of table salt, NaCl, requires the dipole properties of water |
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Definition
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Term
| T/F: Global warming has resulted in a 0.6 degrees C increase in temperature since 1960 |
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Definition
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Term
| T/F: Cl atoms from such man-made molecules as CF2Cl2 have resulted in the destruction of part of the ozone layer |
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Definition
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Term
| T/F: The presence of chlorine monoxide positively correlates with the reduction of O3- |
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Definition
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Term
| T/F: The portion of the atmosphere that we live in is called the stratosphere |
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Definition
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Term
| T/F: Infared radiation has a shorter wavelength than blue light |
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Definition
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Term
| What is the purpose of treating water with chlorine gas or ozone during water purification? |
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Definition
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Term
| The maximum allowable level of lead in drinking water is 15 ppb. This means that our of a sample containing 1 billion atoms, there can be no more than ____ atoms of lead |
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Definition
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Term
| Which of the following describes infared (IR) radiation? |
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Definition
| IR radiation has less energy than visible light |
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Term
| what component of our world acts like the windows of a car left out in the sun by allowing light into the system? |
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Definition
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Term
| why do the natural reactions involving ozone not lead to depletion of the ozone layer? |
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Definition
| c) ozone breaks into fragments that can reassemble into more ozone. d) UV radiation generates more ozone |
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Term
| hwat is the environmentally unfriendly component of chlorinated fluorcarbons that ultimately damages ozone? |
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Definition
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Term
| select all the characteristics that correctly describe a neuron |
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Definition
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Term
| select all the characteristics that correctly describe an electron |
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Definition
| 1) negatively charged ) moves outside the nucleus 3) affected by chemical reactions |
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