1) The students will need supplies like pencils and colored markers for an activity on chemical reactions. There are also reminders about tests and missing work. 2) Chemical reactions involve substances changing identity as their atoms are rearranged. Four reaction types - synthesis, decomposition, single replacement, and double replacement - are defined along with examples. 3) The class will watch a movie on chemical reactions and complete a chart identifying reaction types using a color-coding system with the given equations. Homework includes finishing any missing work and a worksheet.

1. Today in Chemistry
You will need:
1) Pencil/Pen, Colored Pencils, Markers
or Highlighters (4 colors)
2) Bill Nye: Chemical Reactions Handout
– Bookshelf 1 page 1 side
3) Any missing work you owe me

2. Reminders
1) Test #3 Retakes/Takes – End next
Wednesday
2) Progress Notice to be passed out Next
Wed – Please check grades for
accuracy
3) Any missing work you owe me should
be turned in by tomorrow so I can
grade it over the weekend.

3. Chemical Reactions CHANGE THE
IDENTITY of a substance. This means that
the starting substances are NOT chemically
the same after interacting.

4. Type of
Reaction
Definition  Equation
Synthesis
Decomposition
Single
Replacement
Double
Replacement
Watch the movie and then complete the chart.
A = Red B = Blue C = Green D = Yellow
A + B → AB
AB → A + B
AB + C → AC + B
AB + CD → AC +
BD
Two or more elements or
compounds combine to
make a more complex
substance
Compounds break down
into simpler substances
Occurs when one element
replaces another one in a
compound
Occurs when different
atoms in two different
compounds trade places

5. Identifying Chemical Reactions
____ P + O2
→ P4
O10
____ Mg + O2
→ MgO
____ HgO → Hg + O2 ____ Al2O3 → Al +
O2
____ Cl2 + NaBr → NaCl + Br2 ____ H2 + N2 →
NH3
2. Use colored pencils to circle the common atoms or compounds in each
equation to help you determine the type of reaction it illustrates. Use the
code below to classify each reaction.
S = Synthesis D = Decomposition SR = Single Replacement DR = Double
Replacement

6. Homework
1) Anything you may still owe me
2) Bill Nye: Chemical Reactions Handout
– Bookshelf 1 page 2 sides – Due
tomorrow at the end of the period.

7. Homework
1) Anything you may still owe me
2) Bill Nye: Chemical Reactions Handout
– Bookshelf 1 page 2 sides – Due
tomorrow at the end of the period.