Quiz: Physical/Chemical Change  Quiz begin 2 min after the bell rings – feel free to ask questions during this time if you’ve got any!  You have 4 min to work on the quiz T 9/23 and W 9/24

Identify the number of sig. figs. : Round the following number to 3 sig. figs (This one is tricky!) Change the following number to sci. not, and identify the number of sig. figs Warm – up # 5: Sig. figs. Heads up: warm up page will be due the day of the test---have them ALL!!

 Trade your homework assignment with your shoulder partner. Let’s grade it! Trade & Grade

Card Sort 1.Sort the cards into FIVE different reaction types. Each reaction type should have FOUR cards associated with it (one of each color) 2.For each reaction type, copy down the information from each card on notebook paper notes. 3.Come up with names for each reaction type.

Decomposition

Synthesis, Addition, or Combination

Combustion

Single Replacement

Double Replacement

 Decomposition  Synthesis (Combination)  Combustion  Single Replacement  Double Replacement Types of Chemical Reaction Compounds break down Compounds are formed Carbon compounds burning in oxygen, forms water and CO 2 One element replaces another in a compound Two elements switch places in two compounds

 Page 15: identify reaction types #1-7  Element and LoC test next class!  Reminders:  Sept 29/30 (Mon/Tues) Math and Matter Test 2  Karma Questions: 6, 7, 8, 9 are due on test day (use same sheet you turned in for the first set of questions) Homework