Skip to main content

Home/ ASW 8 Science C Block/ Group items tagged relative

Rss Feed Group items tagged

Filter: All | Bookmarks | Topics Simple Middle
harukas

Relative and absolute ages in the histories of Earth and the Moon: The Geologic Time Sc... - 0 views

www.planetary.org/...gic-time-scale-earth-moon.html

relative absolute earth time scale

shared by harukas on 26 Jan 16 - No Cached
  • harukas on 26 Jan 16
     
    This website is about the differences between absolute ages and relative ages. Also, it shows the geologic time scales.
aleksandera

Geologic Time and Climate Change Science - 0 views

www.skepticalscience.com/Climate-Change-Sciencertf.html

time dating change

shared by aleksandera on 26 Jan 16 - No Cached
  • janbanaszuk on 26 Jan 16
     
    The article explains the concept of the geological time scale, it compares it to the climate change which had already occurred and  is occurring.
  • aleksandera on 26 Jan 16
     
    This site explains the relative dating.
emmab25

Introduction to the Ceratopsians - 1 views

www.ucmp.berkeley.edu/...ceratopsia.html

Cretaceous Ceratopsians fossils

shared by emmab25 on 26 Jan 16 - No Cached
  • five-ton animal the size of a car, with a giant bony frill on its head, and you've got a fairly accurate picture of a ceratopsian dinosaur such as Triceratops.
  • are found only in the Late Cretaceous of North America; they are among the last of the dinosaurs (other than the birds of course).
  • Ceratopsians were ornithischians, or "bird-hipped" dinosaurs.
  • ...7 more annotations...
  • The oldest ceratopsians appeared at the beginning of the Cretaceous, about 140 million years ago. In the Late Cretaceous, about 100 million years ago, the ceratopsians began to diversify in North America and in Asia.
  • Forms without the enormous horns and frills of Triceratops, in the family Protoceratopsidae, include the Mongolian genus Protoceratops and the unusual bipedal, frill-less dinosaur Psittacosaurus ("parrot-lizard").
  • Their "beak" and rows of grinding cheek teeth suggest that they fed on tough vegetation. The huge, heavy "frill" of ceratopsians such as Triceratops may have served as armor against the attacks of saurischian predators like Tyrannosaurus, which lived in the same time and place as Triceratops.
  • other ceratopsians had smaller frills and/or frills with large openings; such frills would have been little defense against a predator. So ceratopsian frills may also have functioned as heat radiators, or signaling devices, or to attract mates, in addition to whatever protective function they may or may not have had.
  • Recent work on the oxygen isotopes found inside the bony frill, which indicate the relative temperatures of different parts of the bone, supports the first of these hypotheses: the frills functioned as heat radiators.
  • Ceratopsians probably traveled in herds; there are "bone beds" in the western United States that contain the bones of hundreds of individuals of the same species of ceratopsian.
  • f attacked, the herd could stampede, or "circle the wagons" and fend off predators. In terms of animals living today, it may be best to think of ceratopsians — at least the larger ones — as analogues of elephants or rhinos: large herbivores in herds that relied on horns and attitude to protect themselves.
amys123

Quaternary Period: Climate, Animals & Other Facts - 0 views

www.livescience.com/43151-quaternary-period.html

animals quaternary climate fossils

shared by amys123 on 26 Jan 16 - No Cached
  • The Quaternary Period is a geologic time period that encompasses the most recent 2.6 million years — including the present day. Part of the Cenozoic Era, the period is usually divided into two epochs — the Pleistocene Epoch, which lasted from approximately 2 million years ago to about 12,000 years ago, and the Holocene Epoch, which began about 12,000 years ago
  • amys123 on 26 Jan 16
     
    Information about the Quaternary period (landforms, climates, animals etc.)
aleksandera

Geologic Changes to the Very Good Earth | The Institute for Creation Research - 0 views

www.icr.org/...ologic-changes-very-good-earth

relative dating earth changes

shared by aleksandera on 26 Jan 16 - No Cached
  • aleksandera on 26 Jan 16
     
    This site explains the geological changes over time
juliane_g

Weird Forests Once Sprouted in Antarctica - 1 views

www.livescience.com/ancient-antarctic-forests.html

permian triassic

shared by juliane_g on 26 Jan 16 - No Cached
  • Some 250 million years ago, during the late Permian and early Triassic, the world was a greenhouse, much hotter than it is today.
  • juliane_g on 26 Jan 16
     
    Information on climate during the permian and triassic periods. 
1 - 6 of 6
Showing 20▼ items per page