Sci Trivia

7/30/2019 Sci Trivia

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Pistol Starthe pistol star is the most luminous star known-10 million times the power of the sun and as big as the size

of earth's entire orbit around the sun.

Guest Norriedel Francisco

Do you know what a BEC is?

BEC (Bose-Einstein Condensate) is a supercooled substance that contain no individual atom.The first

BEC was created at the university of Colorado in 1995 by cooling a sample of Rubidium gas atoms to

about 0.00000017K through laser cooling and further cooled in "optical molasses"Guest rosalie

Blue whale

Didi you know that the tongue of a whale is bigger than a bus

Guest Ahmed

Coolest Temperature

The coolest temperature that record in Antarctica is -168.2 degrees Celsius..

Guest steve

~ SEDIMENTS ~

Sediment is a naturally occurring material that is broken down by processes of weathering and erosion,

and is subsequently transported by the action of wind, water, or ice, and/or by the force of gravity

acting on the particle itself.

Stacey_023

Blinking

Humans at least blink within 5 seconds. As because the eyelids protects the eye from dust.

Guest Mica

5 phases of matter ....

There are 5 phases of matter now. The first three are the solid, liquid, gas and the other are plasma and

Bose Einstein condensate.

Guest samantha

The deepest lake

lake baikal- is the deepest lake in the world as ever.............Guest jinky canitan

Hotter than the sun

a lightning strike is 50000 degrees celsius which is 3to 5 times hotter than the surface of the sun

Guest basharrat

Newts are also an amphibian

newts are member of salamander family.they are found in north america, europe and also in asia

Guest maki

Does 7-Up contain lithium?

The original formula for 7-Up contained lithium citrate, a chemical used today as a treament for bipolar

disorders. The ingredient was ultimately removed by 1950.

Guest Red Spot

Where does cashmere wool come from?

Cashmere comes from the wool of the Kashmir goat from the mountains around the Kashmir region of

India.Guest Cashmere Fan

How hot is a lightbulb's filament?

The tungsten filament inside an incandescent lightbulb reaches a temperature of 4,664 degrees

Fahrenheit when turned on.

Guest Dim Bulb

What makes turquoise blue?

Traces of copper give turquoise its distinctive blue color.

Guest Turquoise Lover

No Brains

Starfish (as with many radially symmetric animals) do not have brains.


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gemdragon

1. What percentage of the earth is covered by water? Answer: About 71 percent of the earth's surface is covered by water.

--Submitted by Robert Gagosian, Woods Hole Oceanographic Institute

2. What sorts of signals does the brain use to communicate sensations, thoughts and actions?Answer: The single cells in the brain communicate through electrical and chemical signals.

--Submitted by Torsten Weisel, Rockefeller Institute, New York

3. Did dinosaurs and humans ever exist at the same time? Answer: No. Dinosaurs went extinct at the end of the Cretaceous period, 65 million years ago.

Modern humans did not appear until around 200,000 years ago.

--Submitted by Andrew C. Revkin, New York Times Science Reporter

4. What is Darwin's theory of the origin of species?Answer: Darwin's theory of species origination says that natural selection chooses organisms that

possess variable and heritable traits and that are best suited for their environments.

--Submitted by Jonathan Weiner, 1995 Pulitzer Prize-Winning Author

5. Why does a year consist of 365 days and a day of 24 hours?Answer: A year, 365 days, is the time it takes for the Earth to travel around the Sun. A day, 24 hours,

is the time it takes for the Earth to spin around once on its axis.

--Submitted by Leslie Sage, Nature Magazine

6. Why is the sky blue?Answer: Solar radiation sunlight is scattered across the atmosphere by a process called diffused sky

radiation. The sky is blue because much more short-wave radiation--blue light--is scattered across the

sky than long-wave radiation--red light.

--Submitted by Roy Glauber, 2005 Nobel Prize Winner; Harvard University

7.What causes a rainbow?

Answer: Rainbows can be seen when there are water droplets in the air and the sun is shining.

Sunlight, which contains all colors, is refracted, or bent, off the droplets at different angles, splitting

into its different colors of red, orange, yellow, green, blue, indigo and violet.

--Submitted by Kim Kastens, Columbia University

8. What is it that makes diseases caused by viruses and bacteria hard to treat?Answer: Influenza viruses and others continually change over time, usually by mutation. This change

enables the virus to evade the immune system of its host so that people are susceptible to influenza

virus infection throughout their lives. Bacteria mutate in the same way and can also become resistant

if overtreated with antibiotics.

--Submitted by Helle Gawrylewski, Johnson & Johnson

9. How old are the oldest fossils on earth?Answer: About 3.8 billion years; they're bacteria-like organisms.

--Submitted by Paul Nurse, 2001 Nobel Prize Winner; Rockefeller Institute

10. Why do we put salt on sidewalks when it snows?Answer: Adding salt to snow or ice increases the number of molecules on the ground surface and

makes it harder for the water to freeze. Salt can lower freezing temperatures on sidewalks to 15

degrees from 32 degrees.

--Submitted by Arthur Knudsen, Bridgeton, N.J., Schools

Source: The Columbia News Service


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Californium

Astatine is the rarest element on Earth (approx 28g in the Earth's entire crust.)

Guest Bryan

Californium

The element Californium is often called the most expensive substance in the world (as

much as $68 million for one gram.)

Guest Bryan

Hydrofluoric acidDo you know that hydrofluoric acid is so corrosive that it will dissolve glass,although it is

corrosive,hydrofluoric acid is consided to be a weak acid

Praise505

Carbon

Car tires are black because they are about 30% carbon black , which is added to rubber to

strengthen it . The carbon black also helps it to prevent against U.V. damage

Guest sakshi duklan

Ionizationpotential

cesium has lowest ionization potential. because ionization potential decreases as the size

of the element increases .so cesium being smaller than francium having the lowest

ionization potential in the long form of periodic table,because francium is radio active .

Guest poojbaayaName three allotropes of Carbon

Question: Name three allotropes of Carbon: Answer: Diamond, Graphite, and Fullerene...

Guest Duck

Tungsten(W)

Tungsten has highest m.p(3300centigrate).so it is used as a filament in bulb.

Guest Raghvendra Pal

Mnemonic for organics

Most Electrons Prefer Bonding=MEPB= Methane Ethane Propane Butane

Guest Ed Schramko

Litmus

Rub the petals of a red chinaroseon a piece of white paper and let it dry for two minutesin air. Now just put a single drop of lemon sap on it, you will seea color change from blue

to red. Here you have made a litmus paper- a quick and simpleway to test the presence of

acid and base.

Guest krishnendu

Atmosphere

Oxygen is not the most abundant element in our atmosphere. The most abundant element

is Nitrogen, 78% while Oxygen is 21% and Argon is just short of 1%. Carbon Dioxide and

trace elements make up the rest.

Guest Matt

When the noble ones combine...

Xenon hexaflouroplatinate (XePtF6) is the first compound with a noble gas in it. It was

first producedby Neil Bartlett in 1962.

Guest Eyenine

Fastest Half-Life

Berrylium-8 has the shortest half-life, 70 x 10^-18 seconds, or 0.000000000000000070

seconds.

Guest Eyenine

Very Cold!

The lowest temperature reached inthe laboratory is 7nanokelvins, very near to absolute

zero. The temperature was reached when heliumwas cooled to become a superfluid -- a

fluid that could defy gravity.

Guest Eyenine


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