Sci 7B (309)

Periods 1 and 4.
2.18 Reviewed and corrected 1 def 7 #1,2,3,5.
2.19 Read and discussed.
2.20 Read pages 114-115. Do 2 questions from the board.
2.21 I briefly went over the main concepts.
2.20 Read pages 120-121. Do 1 def & # 1 to 4.