Learning%20

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Learning Teaching Resources on

• Safety in Science Laboratories
• June 2004

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Exemplars of Activities

• Laboratory Safety Rules
• Eye Protection
• Safety Information on Chemicals
• Risk Assessment
• What if a Laboratory Accident Happens?

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Laboratory Safety Rules

• The biggest danger in the lab is YOU (student)!
  You are a danger whenever you are either ignorant
  or careless or both. Remember this because the
  person most likely to suffer from your mistakes
  is YOU!
• ASE (1996) Safeguard in the School Laboratory, ASE

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Laboratory Safety Rules

• Introduction
• Group Discussion
• Ask students to discuss and write the rules they
  should observe in the lab
• Review the results of discussion
• Summary
• Signing a Safety Contract and distribute copies
  of lab safety rules
• Select safety rules applicable to your class
• Posters, slogans, websites, quizzes
• Reference
• Flinn Scientific's "Ideal" Student Safety
  Contracthttp//www.flinnsci.com/Documents/miscPDF
  s/Safety_Contract.pdf
• Contracting for Safety http//www.statweb.org/AC
  T2/parents.pdf

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Safety Contract
Kei Heep Secondary School
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Illustrated Safety Rules

• http//www.mindspring.com/mfallonsp/safety_rules/

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Eye Protection

• Importance of eye protection
• Illustrated by a student experiment or teacher
  demonstration on irreversible denaturing of
  eye-white by acid
• Discuss on when eye protection should be worn
• Demonstration/video on the use of eye wash unit

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Safety Information on Chemicals

• Know how to locate and understand safety
  information of chemicals
• Chemical formula, hazards, safety precautions,
  emergency, disposal, etc

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Online MSDS

• http//www.ilpi.com/msds/index.html
• http//hazard.com/msds
• http//www.freyscientific.com
• http//www.sargentwelch.com
• http//www.flinnsci.com
• http//www.fisheredu.com
• http//www.msdsprovider.net
• http//www.camd.lsu.edu/msds_search.html
• http//ptcl.chem.ox.ac.uk/MSDS

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Risk Assessment

• An analysis of a practical activity to identify
  hazards and to take precautions to minimise the
  risk
• Involve students in thinking about and discussing
  safety in real context, rather than just being
  told what to do
• Novel experiments in science publications,
  open-ended investigations and project learning,
  etc.
• Have to be checked by teachers

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Risk Assessment

• Procedures
• Identifying hazards (Materials / Procedures /
  Equipment)
• Assessing how likely the hazard will actually
  cause harm (risk)
• Deciding what control measures to reduce risk to
  acceptable level
• Finding how to dispose of hazardous residues
• Review
• Examples 1, 2, 3
• References Safety Handbook, Hazcards, Student
  Safety Sheets, ICSCs, MSDSs, CLIP (Chem Lab
  Information Profile), etc.

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Risk Assessment Think thrice before you act

• Hazards

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Reducing the Risks

• Using safer alternatives
• Modifying experimental procedures
• Reducing the scale of experiments
• Reducing the concentrations of solutions
• Using protective measures
• Wearing appropriate PPE
• Alasdair Thorpe, Chemistry Review, Sept 2000

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Risk Assessment

• Forms
• Annotate daily used documents (point-of-use
  texts) e.g. schemes of work, lesson plans,
  worksheets, textbooks, lab request forms and
  apparatus
• A better chance that they will be read and
  followed
• Less demanding to accomplish and more likely to
  be carried out
• Assessment more likely to be modified when the
  activities have be be modified
• Managing Risk Assessment in Science, L196, CLEAPSS

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What if a Laboratory Accident Happens?

• Know the proper actions to be taken in case of
  laboratory accidents
• Be aware of the nature and causes of laboratory
  accidents, and the basic safety precautions for
  prevention
• 12 adapted cases for discussion
• Eye accidents (3), fire, heat burn, cut,
  explosion (2), animal bite, corrosive chemicals
  (2), toxic gas

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Microscale Version
Pins
Shampoo solution
0.4 M NaOH
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What if a Laboratory Accident Happens?
Iron/sulphur Reaction
Conc. Sulphuric Acid
Methyl 4-hydroxybenzoate
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http//cd.emb.gov.hk/sci
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Safety in Exploring Science

• Interactive learning package
• On-line and CD-ROM versions
• http//resources.emb.gov.hk/ses

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Safety Quiz

• Questions with feedbacks to both correct and
  incorrect answers
• Enable students to evaluate and improve their
  understanding on laboratory safety
• Written Safety Test in Safety Handbook for
  California Public Schools http//csmp.ucop.edu/cs
  p/downloads/safety.pdf
• Wordsearch

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On-line Safety Quiz

• Interactive and Interesting MC QuestionsMillionn
  aire Game http//jasonhk.uhome.net/
• Chemistry Safety Quiz http//daphne.palomar.edu/sa
  fetyquiz
• Safety in Hargrave's Laboratorieshttp//www.hargr
  ave.edu/academics/science/safetyCertificate of
  Completion
• Fire Safety Quizhttp//www.survivealive.org/quiz.
  html
• Hot Potatoes create interactive MC,
  short-answer, jumbled-sentence, crossword,
  matching/ordering and gap-fill web-based
  exercises http//web.uvic.ca/hrd/hotpot

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Other Strategies

• PowerPoint on Safety facilities and PPE
  http//www.umd.umich.edu/casl/natsci/slc/modulist.
  html
• Self-learning e.g. ????http//www.naturalking.net/
  exercise.htm
• Role play
• Certificates
• Project work e.g Fire Escape Route Indicator

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Health, Safety Risk

• Student worksheets e.g.
• Risk assessment in science experiments
• Safety symbols
• Can be downloaded in Word format from
  http//www.chemsoc.org/networks/learnnet/hsr.htm

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More Learning Activities

• http//csmp.ucop.edu/csp/resources/curriculum.html
  

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Inquiring Safely

• Terry Kwan Juliana Texley (2003)Inquiring
  Safely A Guidebook for Middle School Teachers,
  NSTA
• Entire book at http//www.nsta.org/main/pdfs/store
  /PB166X2np.pdf

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Acknowledgement

• Dr Albert C Cheung (City University of Hong
  Kong)
• Ms Chu Suk Ching (True Light Middle Sch of HK)
• Dr Joseph K Kwan (HKUST)
• Mr Lee Charn Kau (HKTA Ching Chung Sec Sch)
• Mr Leung Kar Yau (retired)
• Mr Lo Kam Cheong (CCC Kei Heep Sec Sch)
• Mr Mok Ming Wai (United Christian College)
• Mr Pun Kwong Cheung (SKH Tsang Shiu Tim Sec Sch)

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Thank you !

• Mr W C HO
• cdosc21_at_emb.gov.hk
• Tel [phone]