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 47% a cometa comet726a moona moon605an asteroid an asteroid 2444a planeta planet3384universe 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%409433,6%33,6%211538,4%38,4%83742,1%42,1%444water 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 45% by approx 6 metersby approx 6 meters12713by approx 6 kilometersby approx 6 kilometers5025by approx 60 kilometersby approx 60 kilometers5875by approx 6000 kilometersby approx 6000 kilometers4339math 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 January6379in Marchin March969in Junein June4710there is no differencethere is no difference2288Sun 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 47% a type of ancient lizarda type of ancient lizard1662a mountain range in Switzerlanda mountain range in Switzerland6259a type of coal formed in that perioda type of coal formed in that period2047Latin for 'before mammals'Latin for 'before mammals'3210Switzerland 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 warming2431it increases UV radiationit increases UV radiation7914it depletes the oxygen (O2)it depletes the oxygen (O2)536it disturbs Earth's magnetic fieldit disturbs Earth's magnetic field353ecology 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 29% carboncarbon2544oxygenoxygen1848ironiron2599siliconsilicon1825elements riddles » Play geology quiz and see all the questions.