2. What types of hazards do certain substances have?
LEARNING TARGET: I can infer hazard classifications a substance may have and assess appropriate safety precautions.
SEP 13 / Activity A02
Types of Hazards
CHALLENGE Q:
What types of hazards do certain substances have?
VOCAB:
corrosive flammable
A substance that reacts with a solid material
(dissolves)
Catches on fire when exposed to a spark, flame or heat source (burns)

3. safety precautions for potassium hydroxide: goggles and gloves
PROCEDURE and DATA:
Materials:
Procedure: Read pg. A-7
DATA: WS 2.1 (then debrief PPT)
WS 2.2 Venn Diagram (then debrief PPT)
ANALYSIS:
A-9 Q 2 (read, think of answer with question in it)
safety precautions for potassium hydroxide: goggles and gloves

4. CLAIM – EVIDENCE – REASONING (CER) EXERCISE
ANALYSIS (cont'd)
(separate sheet of paper + turn in)
A-9 Q 3
Which substance from WS 2.1 greatest hazard to humans / animals ?
CLAIM – EVIDENCE – REASONING (CER) EXERCISE
Make a CLAIM (a statement or conclusion that answers the original question/problem)
Give 2 pieces of SUPPORTING EVIDENCE (scientific data that supports the claim)
Explain Your REASONING (a justification that connects the evidence to the claim)

5. toxic (poison), flammable (burns), corrosive (dissolves)
ANSWER CHALLENGE Q:
What types of hazards do certain substances have? A:
toxic (poison), flammable (burns),
corrosive (dissolves)
HOMEWORK: (if not done yet)
WS 2.3 / (20pts, 15/15 SEP)
2. C-E-R pgA9 Q3 – separate paper (10pts, next class)