Earth questions This is a list of recently added questions about Earth. Play Earth quiz and see all the questions. What date is earth Day celebrated annually ?April 22. Earth Day is an annual event celebrated on April 22. Worldwide, various events are held to demonstrate support for environmental protection. First celebrated in 1970, Earth Day events in more than 193 countriesCreated by: Tschukaaverage 61% April 22April 22259March 22March 2286July 22July 2220September 22September 2254ecology riddles » What is the current geological epoch?Holocene. The Holocen is the youngest, contemporary epoch.The Holocene encompasses the growth and impacts of the human species worldwide, including all its written history, development of major civilizations, and overall significant transition toward urban living in the present. Created by: Tschukahard 52% HoloceneHolocene232OligceneOligcene74PliocenePliocene71MioceneMiocene63geology riddles » Which two continents have no contact with the Atlantic Ocean?Asia and Australia. The Atlantic Ocean occupies an elongated, S-shaped basin extending longitudinally between Eurasia and Africa to the east, and the Americas to the west. Created by: Tschukaeasy 75% Africa and AsiaAfrica and Asia138Europe and AfricaEurope and Africa199Asia and AustraliaAsia and Australia1644Australia and North AmericaAustralia and North America188Atlantic Ocean riddles » What is the rarest metal in the Earth's crust?Rhenium is a chemical element with symbol Re It is a silvery-white, heavy, third-row transition metal in group 7 of the periodic table. With an estimated average concentration of 1 part per billion (ppb), rhenium is one of the rarest elements in the Earth's crust. Discovered in 1908, rhenium was the second-last stable element to be discovered. It was named after the river Rhine in Europe. Created by: Tschukahard 42% GoldGold317RheniumRhenium1683PlatinumPlatinum1084ZirconiumZirconium843metals riddles » Where is the saltiest lake in the world?In Antarctica. 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.Created by: Tschukavery hard 33% in Antarcticain Antarctica470In AustraliaIn Australia88in Israelin Israel618in Turkmenistanin Turkmenistan234salt riddles » 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.Created by: Ninjaivery hard 33% Mount EverestMount Everest202Mount KilimanjaroMount Kilimanjaro171Mauna KeaMauna Kea228Gyachung KangGyachung Kang86mountains riddles » What object collided with Earth according to the giant impact hypothesis?A planet. According to the giant impact hypothesis Earth once collided with a planet of Mars size usually referred to as Theia, a titaness of Greek mythology, mother of Selene - Moon goddess, which is to reflect the believe the collision was an origin of the Moon. Created by: smyruhard 47% a cometa comet805a moona moon679an asteroid an asteroid 2704a planeta planet3855universe riddles » What part of the Earth's surface is dry land?29,2%. It is currenlty 29.2% - but it may decrease in the near future due to global warming and sea level rise.Created by: Krzysztof Moskalhard 54% 29,2%29,2%452733,6%33,6%231538,4%38,4%91742,1%42,1%494water riddles » If Earth's radius was larger by 1 meter, how much longer would its equator be?By approx 6 meters. 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.Created by: SpikeMehard 46% by approx 6 metersby approx 6 meters14073by approx 6 kilometersby approx 6 kilometers5441by approx 60 kilometersby approx 60 kilometers6327by approx 6000 kilometersby approx 6000 kilometers4673math riddles » In which month is the Earth closest to the Sun?In January. Earth's perihelion occurs around January 3, and the aphelion around July 4. The distance change is about 3.5%, which gives 6.9% increase in solar energy reaching the Earth at perihelion relative to aphelion. Since the southern hemisphere is tilted toward the perihelion, the southern hemisphere receives more energy from the Sun than does the northern over the course of a year. Created by: globalquiz.orghard 44% in Januaryin January6873in Marchin March1026in Junein June4972there is no differencethere is no difference2415hard simple questions riddles » Play geology quiz and see all the questions.