A strong source of light and radio signals that is thought to be an exploding galaxy at the edge of the universe
Quasar
Loss spacecraft due to failure to convert english measurement to metric system
Mars Climate Orbiter by Lockheed Martin Corp.
Layer of clay formed during the Cretaceous period showed high content of what element which caused the disappearance of dinosaurs
Iridium
The center of the Earth is a solid core consists of mostly what?
Iron
Surrounding the core is a layer called the __.
Mantle
Trace elements in the human body.
Iron, copper, zinc, iodine, and cobalt.
Most abundant element in the human body
Oxygen - 65%
6 elements that plants need in addition to water and CO2
N, P, K ,Ca, S and Mg
Phosphate fertilizers are derived from phosphate rock called __?
Fluoroapatite
Hard water contains what ions?
Ca2+ and Mg 2+
In a breathanalyzer, driver's breath is treated with an acidic sol'n of?
Potassium dichromate, 2K2Cr2O7 (Orange Yellow) to Green
A white, tasteless compound of arsenic that dissolves in water which is commonly used in poisons.
Arsenic (III) Oxide, As2O3
Devised a procedure for detecting Arsenic. in which its test bears his name.
James Marsh.
If As2O3 is present it reacts with Hydrogen to form a toxic gas called ARSINE (AsH3)
As air expands in the lungs, it is forced into tiny blood vessels called capillaries. This phenomena is called?
Air embolism
BEC was created by cooling a sample of gaseous ____ atoms using a technique called laser cooling.
Rubidium
A process in which a laser light is directed at a beam of atoms, hitting them head on and dramatically slowing them down.
Laser cooling
The food we eat is broken down, or metabolized, in stages by group of complex biological molecules called what?
Enzymes
The energy content in food is usually measured in what?
Calories
Chemical spray used by Bombardier beetles.
Aqueous solution of hydroquinone, C6H4(OH)2, and hydrogen peroxide
The first known laser
Ruby laser
Spectrum of visible light
400 nm
X Ray spectrum range
0.01 nm to 10nm
Type of electron microscope which makes use of a quantum mechanical property of an electron to produce an image of the atom on the surface of the sample.
Scanning Tunneling Microscope (STM)
German physicist who studied the emission spectrum of the sun and noticed certain dark lines at specific wavelengths
Josef Fraunhofer
The pearly white crown of light visible around the sun during a total eclipse
Corona
French physicist who observed a bright yellow line in the emission spectrum of the sun's corona during the totality of the eclipse.
Pierre Janssen
British Chemist who discovered Helium in a mineral of Uranium
William Ramsay
The only 3 liquid elements at 25 deg. C
Mercury, Bromine and Francium
Element which means "the lazy one" in Greek
Argon
Noble gas which discovered by Frederick Dorn
Radon
Professor of physics who accurately determined the atomic masses of elements
John William Strutt
NaCl also occurs in nature as the mineral called
Halite
A small molecule that serves to facilitate cell to cell communications
Neurotransmitter
The inventor of dynamite who had heart trouble and refused to ingest a small amount of nitroglycerin to ease the pain
Alfred Nobel
A mixture of nitroglycerin and clay that stabilizes the explosive before use.
Dynamite
The most symmetrical molecule known
Buckyball
or "Buckminsterfullerene"
Metals or alloys that when cooled to very low temp, lose their resistance totally.
Superconductors
Two allotropic forms of tin.
Alpha (gray tin) and Beta (white tin)
Boiling point of water decreases with decreasing pressure. True or False
True
Melting point decreases with increasing pressure
True
Class of substances tends so greatly toward an ordered arrangement that melting crystal first forms a milky liquid
Paracrystalliine State
At high temp, Milky fluid changes sharply into a clear liquid that behaves like an ordinary liquid.
Liquid crystal
Killer lake which contains CO2 at a dangerously high level.
Lake Nyos in Cameroon, Africa
Traditional method of measuring a knife for autopsy was to pour _____ solution into the wound and X ray it.
Barium sulfate (BaSO4)
An allow of bismuth, lead, tin and cadmium that has a melting point of 71 deg C.
Wood's metal
A deficienct in the amount of oxygen reaching body tissues
Hypoxia
A thin, acidic difestive fluid secreted by glands in the mucus membrane that lines the stomach
Gastric juice
An organic polymer that imparts rigidity to paper but oxidizes easily causing the paper to discolor.
Lignin
Sizing of paper to prevent ink creep which results in a smooth surface is done using a coat of what compound?
Aluminum sulfate (Al2(SO4)3)
Red blood cells, a component of blood, are also called _?
Erythrocytes
Crystalline form of calcium carbonate which comprises an eggshell
Calcite
The inorganic, insoluble compound of calcium in the bone
Calcium phosphate, Ca3(PO4)2
An egg white is also known as
Albumen
A machine that converts thermal energy to work
Heat engine
A bacteria species that generates electricity
Geobacter
The material most commonly used to fill decaying teeth
Dental amalgam
Substance made by combining mercury with another metal or metals.
Amalgam
Mining in an open pit after removal of the overlaying earth and rock
Strip mining
Coal in gaseous form is called
Syngas
The explosive fertilizer
Ammonium nitrate
A green pigment usually used in wallpaper when Napoleon lived
Copper Arsenate , CuHAsO4
An american chemist received a Nobel prize for his work on radiocarbon dating
Willard F. Libby
Aluminum ore is called
Cryolite
Process to extract aluminum from its ore
Hall process
Carries oxygen in the blood to the lungs and tissues
Hemoglobin
Imparts a bluish tinge to venous blood
Deoxyhemoglobin
The anticancer drug with a side effect of kidney damage
Cisplatin
Cisdiamminedichloroplatinum,
Pt(NH3)2Cl2
When all the fuel in a star is consumed, its core collapses and its.outer layer explodes in a?
Supernova
Nature's own "fission reactor" is found in?
Oklo mine, Gabon Republic
U235 is more abundant than U238. True or False
False
U235 - 0.7202 %
U238 - 99.2798 %
U235 has a lower half life than U238. True or false?
True
U235 - 700 million
U238 - 4.51 billion
Radiation sources for most food preservation
Cobalt 60 & Cesium 137.
Gamma emitters
An approach to treat brain tumor which uses a boron isotope 10B
Boron neutron capture therapy
Ore where lead can be extracted
Galena
Ice that burns
Methane hydrate
Unrefined petroleum, a viscous, dark brown liquid
Crude oil
Gasolines are usually rated according to their __, a meaure of their tendency to cause knocking.
Octane number
Polymer used to make bullet proof windows
Lexan
A hereditary disease in which abnormally shaped red blood cells restrict the flow of blood to vital organs
Sickle cell anemia
The human genetic makeup
Genome
Each gene has a sequence of bases, repeated several times, that has no known function. These sequences are called