10 most difficult Earth riddlesEarth quiz
Which river flows through Zhytomyr?
Zhytomyr is a city in the north of the western half of Ukraine.The Teteriv river generally forms the southern boundary of Zhytomyr, though there are also some small areas of Zhytomyr city territory below the southern bank of the river. Its northern part is contaminated by the Chernobyl power plant.
How much does planet Earth weigh?
about 6 billion trillion tons
about 6 million trillion tons
about 60 thousand trillion tons
nobody has calculated it exactly yet
Henry Cavendish, british physicist (1731-1810) was the first scientist to calculate mass of the Earth. Greater accuracy has not been achieved for nearly 100 years. He only made a mistake about 1% compared to today's calculations. Cavendish estimated the mass of the Earth to be 6 billion trillion tons. Modern calculations say about 5.9725 billion trillion tons. (5,97219×10^24 kg)
Who first proposed the need to use summer time?
The idea of daylight saving was first conceived by Benjamin Franklin during his sojourn as an American delegate in Paris in 1784. Sometimes, the creator of this solution is George Vernon Hudson, who wanted to "make better use of the long days of summer. The pioneers in the introduction of summer time were Germans during the First World War.
Who is a LUCA?
a theoretical extraterrestrial being
a the common ancestor of all current life on Earth
a hypothetical organism prehuman
a missing link in Darvin's theory of evolution
The last universal common ancestor (LUCA) is the most recent population of organisms from which all organisms now living on Earth have a common descent. LUCA is not thought to be the first living organism on Earth, but only one of many early organisms, whereas the others became extinct. In 2016 study identified a set of 355 genes inferred to have been present in LUCA. LUCA is estimated to have lived some 3.5 to 3.8 billion years ago in the Paleoarchean era.
If Earth's radius was larger by 1 meter, how much longer would its equator be?
by approx 6 meters
by approx 6 kilometers
by approx 60 kilometers
by approx 6000 kilometers
For each circle, the length of the circumference is c=2πr. Hence, if a radius grows by 1 meter, the circumference grows by 2 π meters - no matter what the initial value of radius was.
Where is the saltiest lake in the world?
With a salinity level of over 40%, Don Juan Pond is the saltiest of the Antarctic lakes. This salinity allows the pond to remain liquid even at temperatures as low as −50 °C (−58 °F) due to the interference of salts with the bonding of water molecules. Don Juan Pond was discovered in 1961 by George H. Meyer.
What is the only country to be in all 4 hemispheres?
Fed. States of Micronesia
Kiribati, is an island republic in the Central Pacific. It comprises 33 coral atolls and isles stretching along the equator. It is the only country in all four hemispheres. The country's capital is South Tarawa. It is pronounced "Kiri-bahs"
Which of our solar system neighbors would fit into Russia?
Pluto, our tiny intrasolar neighbor, has a surface area of only a scant 6.45 million square miles. That might seem like quite a few square miles to sling around, but by comparison, that’s only one-third of one percent of the Earth’s total surface and small enough to fit entirely within the borders of Russia (6.6 million square miles). Pluto is a dwarf planet in the Kuiper belt, a ring of bodies beyond Neptune. It was the first Kuiper belt object to be discovered and is the largest known plutoid (or ice dwarf).
What is the tallest mountain in the world, when measured from its base?
Mauna Kea is a dormant volcano on the island of Hawaii. Standing 4,207 m above sea level, its peak is the highest point in the state of Hawaii. Most of the mountain is underwater; when measured from its oceanic base, Mauna Kea is over 10,000 m tall and is the tallest mountain on Earth.