March 5-9

This week we had the key lesson on the Clock of Eras.  The Clock of eras is a graphic aid to help us visualize geologic time. The Clock of Eras uses the analogy of a circular clock to represent the development of our planet in geologic time. One can see at a glance the relative time lengths of each major geologic era. This lesson precedes the key lessons on the Timeline of Life.

We had a lesson on the Precambrian Era of the Timeline of life.  We discussed the history of Earth beginning with the moments following the big bang.  The Precambrian Era spans Earth's entire history prior to 600 million years ago before the formation of the oldest rocks with recognizable fossils in them.  There are no fossils from this time since the primitive living things did not have bones or hard parts to fossilize.  We leared that the Precambrian Era is divided into three eras the Hadian, Archean, and Proterozoic Eras.

We continued our study of the Timeline of life with lessons on the Paleozoic Era.  We learned that the name Paleozoic has Latin and Greek roots meaning "ancient life."  The Paleozoic Era is split into six periods: the Cambrian, the Ordovician, the Silurian, the Devonian, the Carboniferous, and the Permian.  Life on Earth was beginning to expand and diversify into more complex creatures like the trilobite, crinoids, brachiopods, ammonites and primitive vertebrates.

At the end of the week we had the opportunity to visit the Virginia Aquarium.  This trip brought our timeline studies alive for everyone!  The "Restless Planet" exhibit explored each period in the timeline of life and had interactive displays, fossil collections, and simulations of what was happening on planet earth millions of years ago.  The trip was amazing =)

putting together a puzzle of Earth's tectonic plates

observing fossils through a magnifying glass

interacting with stingrays

watching the location of Virginia change throughout Earth's history and the shifting tectonic plates

jumping to create vibrations picked up by the seismograph

exploring the horseshoe crab, thought to be a descendant of the trilobite

The grasses are growing rapidly in our "Grasses for the Masses" project!

In art we illustrated and colored pictures of creatures from the timeline of life.  Some students are illustrating their own copies of books written about each era.  Others are enjoying coloring pictures and writing sentences about the timeline.

This week in P.E. the children focused on learning the basic skills of field hockey.  We are excited for the Shamrock Final mile coming up!  It will be an exciting culmination of our class efforts to run a full marathon together!