Friday February 8, 2013 (Quiz 18)

The Launch Pad Friday, 2/8/13 Which type of rock is this? Mid- to late-50s rock

Announcements Happy Opera Day!

Announcements I will be available after school today until 4:45.

Assignment Currently Open Summative or Formative? Date IssuedDate Due Date Into GradeSpeed Final Day Quiz 16S11/18 1/24 TODAY Quiz 17S22/1 2/15 WS – Sedimentary Rocks F92/42/5 TODAY Lab – Sedimentary Rocks F102/52/6 TODAY WS – Metamorphic Rocks F112/62/82/15 Lab – Metamorphic Rocks F122/72/92/15

Recent Events in Science Most Comprehensive Tree of Life Shows Placental Mammal Diversity Exploded After Age of Dinosaurs Read All About It! htm An international team of scientists including University of Florida researchers has generated the most comprehensive tree of life to date on placental mammals, which are those bearing live young, including bats, rodents, whales and humans. Appearing February 7 in the journal Science, the study details how researchers used both genetic and physical traits to reconstruct the common ancestor of placental mammals, the creature that gave rise to many mammals alive today. The data show that contrary to a commonly held theory, the group diversified after the extinction of dinosaurs 65 million years ago. The research may help scientists better understand how mammals survived past climate change and how they may be impacted by future environmental conditions.

Quiz 18