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Scientific Endeavour

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Jietong Xing

on 9 January 2013

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Transcript of Scientific Endeavour

Chapter 1
Scientific Endeavour 1.1 What is Science? Is Science only observed in the laboratory? 1.2 How is Scientific Knowledge Derived? Attitudes in Science 1.5 Safety Practices 1.4 How does Science & Technology Affect our Lives? Advantages Science is the study of the natural
and physical world.

Science is not confined to a laboratory, but is manifested in all aspects of our lives. Curiosity
Perseverance Disadvantages Medicine Cure diseases Risk of antibiotic-resistant
superbugs -Resistant
food craps Resistant to
attacks by pests
and disease-causing
organisms Genes may be transferred
which may upset the balance
of the ecosystem Automobiles Allow convenient
transportation of
people and things Emissions cause
air pollution Limitations of technology Technology cannot solve all our problems.

Nonetheless, it has improved our lives.
However, we need to be mindful and apply Scientific Knowledge responsibly. 1.3 How is Scientific
Knowledge Derived? The Scientific Method Engaging with an event
- Pose questions, generate ideas, propose a hypothesis Collecting and presenting evidence
- Make observations, collect evidence Making meaning of information and evidence
- Analyse, compare or classifying results/data Communication
- Share findings through various representations Safety Precautions Throughout
- Be serious, do not play or tamper with equipment
- Keep your desk clean and tidy Before
- Prepare all apparatus such that you will not knock them over During
- Never smell or taste chemicals
- Wear goggles when heating or mixing chemicals
- Never handle broken apparatus with bare hands, inform teacher and use broom and dustpan to clear up After
- Dispose waste materials in proper waste bins, never throw solids/corrosive liquids in the sink
- Wash your hand thoroughly Hazard Symbols Hazard Symbols are used to alert us.
- Refer to textbook page 19

It is important to demonstrate safety consciousness and adopt safe practices when carrying out investigations. Safety in the Laboratory Report all injuries, breakage and spillage to teacher immediately!
Personal Protective Equipment
- Safety goggles when heating and mixing subtances
- Avoid loose garments e.g. ties
- Avoid long, loose hair styles

Student use of Laboratory
- No entry without permission from your teacher
- No unauthorised experiments
- No eating or drinking in the laboratory

Testing of Odours
- Do not smell the flask directly
- Carefully waft the vapour from the flask Safety in the Laboratory Report all injuries, breakage and spillage to teacher immediately!
Heating of Test Tubes
- Keep the flask a distance from your face
- Make sure that the test tubes are not directed toward yourself or your classmate

Acids and water
- Do not add water to concentrated acid
- The heat generated may cause splattering
- Always wear eye protection

Broken glass
- Report all breakage to your teacher
- Sweep away the broken glass using a broom and dustpan
- Place broken glass in a container designated for sharp objects Safety in the Laboratory Report all injuries, breakage and spillage to teacher immediately!
Before leaving the laboratory...
- Throw all used solutions into the sink
- All solid waste should be thrown in a dustbin
- Wash all apparatus and return them to their original locations
- Always wash your hands thoroughly before and after every practical lesson
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