Earth questions This is a list of recently added questions about Earth. What object collided with Earth according to 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 40% a cometa comet311a moona moon227an asteroid an asteroid 1134a planeta planet1161universe 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 57% 29,2%29,2%277133,6%33,6%125138,4%38,4%53342,1%42,1%299water 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 47% by approx 6 metersby approx 6 meters8334by approx 6 kilometersby approx 6 kilometers2942by approx 60 kilometersby approx 60 kilometers3543by approx 6000 kilometersby approx 6000 kilometers2821math 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 47% in Januaryin January4844in Marchin March664in Junein June3155there is no differencethere is no difference1483Sun riddles » After what is the Jurassic period named?A mountain range in Switzerland. The Jurassic period is named for the Jura Mountains in between France and Switzerland, where many fossils have been found.Created by: MarcusXhard 52% a type of ancient lizarda type of ancient lizard1038a mountain range in Switzerlanda mountain range in Switzerland4541a type of coal formed in that perioda type of coal formed in that period1284Latin for 'before mammals'Latin for 'before mammals'1818Switzerland riddles » Why is the ozone hole dangerous?It increases UV radiation. In the ozone layer, ozone molecules absorb UV-B and UV-C radiation - short wavelength forms of ultraviolet that can disrupt organic molecules, producing cancerous changes in living cells.Created by: Riho Ishiieasy 70% it speeds up the global warmingit speeds up the global warming1744it increases UV radiationit increases UV radiation5840it depletes the oxygen (O2)it depletes the oxygen (O2)424it disturbs Earth's magnetic fieldit disturbs Earth's magnetic field271ecology riddles » What is the most common element (by mass) forming the planet Earth?Iron is most abundant in the Earth's outer and inner core, and it is the fourth most common element in the Earth's crust.Created by: globalquiz.orgvery hard 31% carboncarbon1848oxygenoxygen1346ironiron2152siliconsilicon1436elements riddles » Play geology quiz and see all the questions.