Pliocene and Pleistocene climatic conditions

The uppermost epoch of the Neogene period isthe Pliocene epochthe Pleistocen epochthe Miocene epochthe Oligocene epoch

Which of the following is NOT true for the mid-Pliocene:Group of answer choicesHuman migration to Australia occurred over the Sahul land bridgeSea level was up to 20 metres above modern levelsGreenland did not have a permanent ice sheetSouthern Australia experienced wetter conditions as indicated by pollen recordsCarbon dioxide levels were around 400 ppm

Paragraph5: Milankovitch attributed the onset of the Pleistocene Ice Age to variations in threeparameters of Earth's orbit. The first of these is orbital eccentricity, which is the degree that Earth'sorbit departs from a perfect circle in its orbit around the Sun. The orbit varies from nearly a circle toan ellipse (an oval-shaped, elongated circle) and back again in about 100,000 years. Thiscorresponds closely to 20 warm-cold climatic cycles that occurred during the Pleistocene. Thesecond parameter is the angle between Earth's axis and a line perpendicular to the plane of theecliptic (the path along which the Sun appears to move). This angle shifts about 1.5 degrees duringa 41,000-year cycle. The third parameter relates to another complicated movement pattern with a23,000-year cycle. Milankovitch proposed, and now many scientists agree, that the interaction ofthese three parameters provided the triggering mechanism for the glacial-interglacial episodesduring the Pleistocene.5. The word “this” in the passage refers toA: the variation in three parameters of Earth’s orbitB: the amount of time it takes for Earth to orbit around the SunC: the length of the Pleistocene AgeD: the variation of Earth’s orbit from a circle to an ellipse and back to a circle

The glacial conditions persisted until the __________, which marks the end of the Ice Age and the beginning of the Holocene Epoch that we live in.Group of answer choicesPliocene EpochOlder DryasPleistocene EpochYounger Dryas

What happened during the Pleistocene to cause global cooling?low solar activityfossil fuel consumptionbreakup of Pangaeaa shift in earth’s orbit