Environmental Science Facts

• An atmospheric gas with a GWP20 of 10 indicates that 1 tonne of the gas has a global warming potential 10 times greater than 1 tonne of CO2 over 20 years.
• A polymer is a high molecular weight chain made of small molecules.
• Methane, a biogas fuel, is produced through anaerobic digestion of biomass.
• Coal is not considered a renewable source.
• Increasing temperature increases the plasticity of thermoplastics.
• Wind turbines release the least amount of carbon dioxide when producing electricity.
• In a battery, chemical energy converts to electrical energy through reduction-oxidation reactions between electrodes and an electrolyte.
• Limestone is not a copper containing material.
• Sight is best to gather data (e.g., qualitative observation) from a chemical system
• Asbestos was banned due to carcinogenic asbestos particles and fibers.
• The false statement about rubber is that it is not possible to make synthetic rubber.
• Sea water is a major natural source of magnesium.
• Benzene is a Category 1A carcinogenic chemical.
• Phenol is another chemical formula

Atmospheric Temperature

• Average temperature of atmosphere is determined by sunlight absorbed by gases, reflected by clouds, and absorbed by Earth's surface.
• Approximately 20% of sunlight is absorbed by gases in atmosphere.
• Nylon is the best known polyamide.
• The atomic packing factor of a material with a body centered cubic structure is 0.68.
• The general formula for carbohydrates is (CH2O)n.
• Potassium would not be found in the anode mud of an electrolytic cell to refine copper.
• Photovoltaic cells produce energy by utilizing the sun's energy to create a flow of electrons in a material like silicon.
• A green pipeline carries water.
• Watt is not a unit of energy.
• Reduction is necessary in metallurgy because most metals exist naturally as cations in the oxidized state.
• Handling wastewater for BOD tests is critical, start testing ASAP, if not keep samples below 4C, without freezing, for no more than 48 hours
• Per reports, average global temperature increased 1.1K since pre-industrial levels.
• Based on ASME and ANSI standards, black on yellow is used to identify pipelines carrying flammable fluids.
• Aluminum is the most commercially important nonferrous metal.
• Lead is not present in substantial quantities in a healthy human body.
• Sodium cyanide is an important reagent in the metallurgy of gold.
• Cu occurs as native ore to an extent in only a few locations on Earth's surface, but is obtained commercially from low-grade ores.
• Iron obtained from the blast furnace contains carbon and is called Pig Iron
• The two approved methods for determining the initial and final dissolved oxygen concentrations in a wastewater sample in the five-day BOD test is the fluorescence method, and the diaphragm electrode method.
• In a nuclear power plant energy is produced by the nuclear fission of uranium or plutonium to release heat that generates steam and drives the turbine to produce electricity
• H2 is a chemical formula
• Ceramics are refractory materials.
• The sample mass range for micro analyses is 1-10 mg.
• Kw for water increases as the temperature increases.
• Precipitation is the gravimetric method of determining the amount of calcium in water.
• As the pH of a solution rises, [H3O+] falls; [OH-] rises.
• Beer's Law describes the absorption of radiant energy with respect to concentration.
• Boil acid solution before completing titration in the standardization of an acid solution with primary standard sodium carbonate to eliminate the reaction product CO2 and H2CO3
• All of these must be considered during buffer actions
• Except pleasant almond odors, all the following describe amines: low molecular weight amines are water soluble, primary amines can hydrogen bond and amines are basic organic compounds
• The false statement about carboxylic acid is that most are strong acids.
• Seven isomers correspond to the formula C4H10O.
• Natural condensation polymers are examples of proteins.
• Nylon is the best known polyamide.
• The monod equation for microbial kinetics suggest that, at a high concentration of the limiting substrate (S), the specific growth rate is zero order in S.
• In the homologous series of alkanes, each member differs from the next member by a CH2 group.
• Carboxyl is the most polar functional group.
• Glass is considered amorphous solid.
• two atoms are contained in a body centered cubic lattice.
• Silicon (Si) is a semiconductor.
• Sodium Hydroxide is considered a hazardous material.
• the standard oxidation or incubation test period for BOD is 5 days at 20 C
• Agent Orange contains a water contaminant that causes methemoglobinemia or the blue baby syndrome