1-Do You Know-1
What Would a 100-Pound Person Weigh on Mars?
Mars gravity is 38% less of that of the Earth at sea level, so a man
weighing 100 pounds on Earth will weigh only 38 pounds on Mars.
How Long is a Martian Year and a Martian Day?
Of course one year, only if you are from Mars; but if you are on Earth, that
year may be about twice as long as of the Earth - 687 days. its day is only
1/2 hour longer than the Earth day - 24 hours 37 minutes, compared to 23
hours and 56 minutes on Earth. (Because a day on any planet in our solar
system is measured by how long it takes to spin on its axis, making the
Sun rising in the morning.
Has the Moon Always Been so Close?
It used to be much closer - a billion years ago. Then it took only 20 days
to go round the Earth making a month. At that time the day on Earth was
only 18 hours long. The Moon is still moving away - 1.6" (4 cms) a year;
while meanwhile the Earth's rotation is slowing down lengthening our days.
In the distant future our day will be 960 hours long.
What is Earth's Diameter?
7,926 miles (12,756 Kms).
What is the Earth's Surface Area?
196,950,711 square Miles (510,100,000 square Kms).
How Far is the Center of the Earth From Its Surface?
3,963 miles (6,378 Kms). Much of Earth is fluid. Its most solid part is
only 41 miles - thinner than the skin of an apple relatively speaking.
How Hot is the Earth's Inner Part?
The temperature of the Earth increases
about 36 degrees Fahrenheit (20 degree Celsius) for every Kilometer (0.62 mile)
you go down. Near the center it should be 7,000 degrees Fahrenheit (3,870 degree
When Earth is Mostly Liquid, Do Things Inside Earth Flow?
Sure. Only in 1999 the researchers found that the Earth's core moves in
swirling pockets like tornados and hurricanes over the surface.
Does All of the Earth Spin at the Same Rate?
No. Its innermost part which is a mass of iron and is about of Moon size,
spins faster than its outer portion of the iron core which is mostly liquid.
A study of 1996 showed that over the previous century, the extra speed caused
the inner core to gain a quarter-turn on the planet as a whole. So the inner
core made a complete revolution with respect to rest of Earth in 400 years.
How Much Oxygen in Earth's Environment?
Most part, 80% of the air on Earth is Nitrogen, most of the rest (less
that 20%) is Oxygen along with tiny bits of other stuff thrown in.
How Much Earth's Area is Desert?
About one third.
How Much Water of the Earth is in Oceans?
Where is the Most Fresh Water Supply on the Earth?
In Antarctia and Greenland - 70% - remaining is in atmosphere, lakes,
rivers, streams or groundwater etc which is merely 1% of the Earth's
total. Even among groundwater, rivers and lakes, the groundwater contains
about 30 times greater volume than all freshwater lakes; and more than
3,000 times more than all streams and rivers at any given time.
All continents' names start from A and
end in A - Africa, America, Asia, Australia, Arctic and Antarctica.
Which Are the Two Major Gold Producing Countries?
South Africa producing 5,300 metric tons per year, and United States 3,200
metric tons per year.
How Many Minerals Are Known in the World?
4,000, although only 200 are of major importance. Approximately 50-100
new minerals are added each year.
Which Are the the Softest and the Hardest Minerals
The softest mineral is the Talcum (which is used to make talcum powder);
and the hardest mineral is the Diamond.
Is Ice a Mineral?
Yes, and it is described as such in Dana's System of Mineralogy.
How Much Would Sea Level Rise If The Whole Antarctica Ice Sheet Melted?
Can You Guess? Antarctica Ice Sheet holds nearly 90% of the world's ice
and 70% of freshwater. If the entire ice melted, it would rise the sea
level by 220 feet (almost 10-story building high. Scientists say that by
2100 the sea would rise above 3 feet.
What Volcano Killed the Most People?
The Tambora Volacno eruption in Indonesia in 1815 - 90,000 people. Though
most people died because of starvation, contamination of water and disease.
Of the United States of America
The Highest Fall in the USA
Yosemite Falls in California - 2,425 feet (739 Meters).
The Deepest Canyon in the United States?
The Snake River dug "Hell's Canyon" along the Oregon-Idaho
border - it is more than 8,000 feet (2.4 Kms) deep. In contrast the
Grand Canyon is less than 6,000 feet - a bit more than a mile, deep.
What North America Plant Can Live for Thousands of Years?
The creosote bush, which grows in the Mojave, Sonoran, and Chihuahuan
deserts, has been shown by radiocarbon dating to have lived since the
birth of Christ. Some of these plants can live for 10,000 years.
The Value of the Metal in US Coins
The value of the metal in US coins is 1.7 cents for a current penny
(about 2.3 cents for a pre-1986 penny) and about 7.5 cents for a nickel.
(as of April 24, 2008)
Blacks in US
First Black President of
the USA - Barack Obama elected in 2008-2012
First Black Governor of Virginia - Lawrence Douglas Wilder (1990-1994)
First Holiday for a Black - Martin Luther King, Jr holiday - started in
1986 - on the third Monday of January