2. studies properties of materials
LEARNING TARGET: I can analyze comparison data of materials, use supporting evidence to argue the ‘best choice’ material and discuss trade-offs.
Oct 10 / Act B12
Evaluating Materials
CHALLENGE Q
Which is the best material for making a drink container?
VOCAB:
material materials scientist materials engineer
type of
matter/stuff
studies properties of materials
how to use materials

3. DISCUSSION
Which of three materials - aluminum, glass or plastic – would make the best drink container? Read B3-4
2. What are properties that help you make best choice of material? (student talk)
breakability / safety
cost
convenience (reclose-able cap)
recyclability
density / weight

4. PROC AND DATA MATERIALS: PROCEDURE: Read B-5 and summarize
DATA: WS (activity)
*Cal vs cal vs kcal video – 3 mins

5. Groups Organize cards into Categories (activity)
Debrief (possible Categories):
aluminum – glass – plastic
cost to produce
% recycled
containers per ton
kcal of energy to make one ton
% of solid waste
* "Story of" video – 8 mins
MAKE GRAPHS
Each student in group make different graph
Compare graphs /debrief (next slide)

6. Graphing Data on Aluminum, Plastic and Glass
containers per ton of material
percent recycled
container type as percentage of solid waste
cost to produce container
kcal (kilocalories)
of energy to make one ton
pollutants and waste created in producing one ton

8. DISCUSS & WRITE:
How did the graphs change your decision on drink container material chosen?
ANALYSIS: B6 Q1 Q2
two best aspects for choice:
depends on "needs" (recycling and cost?)
more information needed?:
consumer choice, wastes from making, how more environmentally friendly, etc.

9. CER Q5
*started end of class if extra time
ANS CHALLENGE Q
Which is the best material for making a drink container? A:
depends on the situation and
needs / priorities
HOMEWORK
1. READ CAREFULLY - Life Cycle on B (next class)
2. CER (10pts, next class)