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7th Grade Science

Mr.Kang's Classroom Log 

Tuesday, January 23, 2007

Tuesday 1/23/07

What was done?
  1. We read p.179-181.
  2. Workbook p.57-58.

What was collected?
  1. "Age of Rocks" notes with summary.

What was assigned?
  1. Section 6-4 Review Worksheet.

Daily Science Fact
 The Cambrian Period marks an important point in the history of life on earth; it is the time when most of the major groups of animals first appear in the fossil record. This event is sometimes called the "Cambrian Explosion", because of the relatively short time over which this diversity of forms appears. It was once thought that the Cambrian rocks contained the first and oldest fossil animals, but these are now to be found in the earlier Vendian strata.

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