PPT-Mass Extinctions

The struggle for life on earth Mass Extinction Definition A significant proportion of species become extinct between 30 and 95 The extinctions operate across a wide range of environments and . Mass extinctions are global events characterized by unusually high rates of extinction The magnitude of these rates is usu ally unspecified but it is generally significantly higher than the rate of so called background extinctions that is extinc tio . Rachel. . Finck. May 7, 2014. Measure. by TOF. Stimulate. cells . in vitro. Crosslink. proteins. Stain with . isotope . tagged Abs. Nebulize . single-cell. droplets. Ionize. (7500K). Permeabilize. entire branch.Global extinction re The Sixth Mass Extinction. Essential Questions. What is extinction?. Which species have become extinct in modern times? . What are the characteristics of past mass extinctions? . How do modern extinction rates compare with natural (background) rates?. The sixth . m. ass . e. xtinction. Objectives. Define . extinction.. Give examples of (1) past mass extinctions (2) and recent species . extinctions.. Compare current extinction rates with background extinction . Lesson objectives relative mass. Understand the term ‘isotopes’. Define the terms ‘relative isotopic mass’ and ‘relative atomic mass’ based on the . 12. C scale. Understand the terms ‘relative molecular mass’ and ‘relative formula mass’ including calculating these from relative atomic masses . What is extinction? . Extinctions occur when the last individual of a species dies out. . Functional Extinctions occur when individuals remain but the odds of sustainable reproduction are low. i.e. the species is effectively extinct even though individuals remain. . Opportunities and. Adaptive Radiations. Overview. Extinctions. Adaptive Radiations—New Niches. Stem mammals survived and experience adaptive radiation.. Evolution of birds, feathers, flight, and flightlessness.. The Roaring Twenties . = a time of vibrant and dynamic popular culture.  . Berlin became a center of theaters, cabarets, cinemas, and jazz clubs.  . Dance crazes - the Charleston, etc..  . Josephine Baker. Composition of Substances and Solutions Atomic Mass and Formula Mass; Mole & Molar Mass; Percent Composition of Compounds; Determination of Empirical & Molecular Formulas; Molarity Other Units for Solution Concentrations 99.9% of all living things that have ever existed on earth have gone extinct. earth has experienced 5 five extinctions . Geologic time scale. Era. Largest unit of geologic time . lasts tens to hundreds of millions of years and consists of two or more periods. . Essential Questions. What is extinction?. Which species have become extinct in modern times? . What are the characteristics of past mass extinctions? . How do modern extinction rates compare with natural (background) rates?. Mass Margin Mass Limit or Mission Limit Mass Reserve Mass Growth Allowance (MGA) Mass Margin Mass Limit or Mission Limit Mass Reserve Mass Growth Allowance (MGA) dm dmxydmxzdmxydmdmyzdmxzd in the Earth Sciences. Tony Elger. East Lothian U3a . 2017. 1. Episode 1 Uniformitarianism versus Catastrophism. Episode 2 Are . We ‘All Neo-Catastrophists Now. ’?. Introduction: Illustrations, Aphorisms and People.