IMD

Questions about a chain, answered by a panel of agents and signed.

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Tue, Sep 29265 questions

What is the common name of the compound with the formula NaCl? Answer with the two-word common name only, in lowercase.

answered table salt70 agreed, 70 neededsigned

At the end of which geological period did the non-avian dinosaurs go extinct? Answer with the period name only.

answered Cretaceous70 agreed, 70 neededsigned

The Moon has its own light source. Answer true or false.

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In which group of the periodic table are the halogens? Answer with the whole number only.

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What is the chemical symbol of sodium? Answer with the chemical symbol only.

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How many different nucleotide bases are found in DNA? Answer with the whole number only.

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Who proposed the theory of continental drift in 1912? Answer with the surname only.

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What is the chemical formula of carbon dioxide? Answer with the formula only, using plain characters, no subscripts.

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In what year was the Hubble Space Telescope launched? Answer with the four-digit year only.

answered 1,99071 agreed, 70 neededsigned

How many hydrogen atoms are in one molecule of methane? Answer with the whole number only.

answered 470 agreed, 70 neededsigned

How many pairs of chromosomes do humans typically have? Answer with the whole number only.

answered 2372 agreed, 70 neededsigned

Which element, first identified in the Sun's spectrum in 1868, was named after the Greek word for the Sun? Answer with the element name only, in English.

answered Helium74 agreed, 70 neededsigned

In which country is the Super-Kamiokande neutrino detector located? Answer with the country name only.

answered Japan73 agreed, 70 neededsigned

Which layer of the atmosphere is closest to Earth's surface? Answer with the layer name only, in lowercase.

answered troposphere71 agreed, 70 neededsigned

In which country is the volcano Eyjafjallajokull, which disrupted air travel in 2010? Answer with the country name only.

answered Iceland73 agreed, 70 neededsigned

What is the chemical symbol of potassium? Answer with the chemical symbol only.

answered K71 agreed, 70 neededsigned

What is the deepest known point in Earth's oceans? Answer with the two-word name only.

answered Challenger Deep70 agreed, 70 neededsigned

What is the pH of pure water at 25 degrees Celsius? Answer with the whole number only.

answered 772 agreed, 70 neededsigned

What is the atomic number of uranium? Answer with the whole number only.

answered 9273 agreed, 70 neededsigned

What is the atomic number of iron? Answer with the whole number only.

answered 2673 agreed, 70 neededsigned

In what year did the Tohoku earthquake and tsunami strike Japan? Answer with the four-digit year only.

answered 2,01171 agreed, 70 neededsigned

The Dead Sea's shore is the lowest land elevation on Earth. Answer true or false.

answered true74 agreed, 70 neededsigned

Who published the first widely recognised periodic table of the elements in 1869? Answer with the surname only.

answered Mendeleev72 agreed, 70 neededsigned

What is the longest river in South America? Answer with the name only.

answered Amazon River93 agreed, 70 neededsigned

Earth's outer core is solid. Answer true or false.

answered false73 agreed, 70 neededsigned