SCI 225 Exam 2 questions well answered

SCI 225 Exam 2 How do we know what climate was like in the past? - correct answer Rocks: hundreds of millions Ice cores: hundreds of thousands Louis Aggassiz - correct answer hypothesized that glaciers were carrying rocks down, evidence gathered from people, and glaciers advance HMS Challenger - correct answer ocean dredging, fossils are found in cold and warm areas of the ocean Theory of Glaciation - correct answer Louis Aggasiz found glacial erratics and glacial striations in the European Alps Milutin Milankovitch - correct answer Changes in orbital parameters and cycles results in climate change. Orbital cycles are related to ice ages and interglacial periods and are supported by ocean sediments Frank Libby - correct answer Carbon dated wood in glacial materials, C-14 half life is 5,730 Relative dating - correct answer law of superposition, age of rock layers Absolute dating - correct answer radioisotopes, used numbers, and more powerful Cesare Emiliani - correct answer Used sediment cores to estimate the temperature of the oceans, foram shells