SA2 sec 1 science

• Attitudes in science

  • Curiosity
  • Integrity
  • Open-mindedness
  • Criticalness
  • Creativeness
• Science

  The study of natural phenomena in the world
• Attitudes in science

  • curiosity
• Attitudes in science

  • curiosity
  • integrity
  • open-mindedness
  • criticalness
  • creativeness
• Independent variable


  The condition in an experiment that is being changed
• Dependent variable


  What is being measured or observed as a result of what was being changed
• Control variable

  The condition in which was unchanged or kept constant in an experiment
• Scientific Method

  1. Observe
  2. Question
  3. Hypothesize
  4. Experiment
  5. Gather results
  6. Conclusion
• Independent variable example


  Time spent studying
• Dependent variable example

  Test results
• Hypothesis is a theory that is not yet to be proven true
• Corrosive - substances may cause severe damage to body parts.

  
• Irritant/harmful - chemicals can cause skin irritation, eye irritation, and respiratory irritation

  
• Environmental toxicity - substances which is harmful to the environment

  
• Oxidizing substance - substances release oxygen easily, which causes fire and/or explosion.

  
• Explosive - substances causes explosion upon contact with heat.

  
• Gas under pressure - substances may explode when heated or cause breathing difficulties when leaked in enclosed places.

  
• Acute toxicity - substances causes harmful effects to the body when breathed in, swallowed or upon contact with skin

  
• Flammable - substances catches fire easily

  
• Aspiration hazard - substances may damage organs, and cause cancer and breathing difficulties.

  
• Medicine advantages

  medicines such as antibiotics help cure diseases
• Medicines disadvantages

  The use of antibiotics increase the risk of antibiotic-resistant 'bugs'
• Pest & disease resistant food crops Advantages

  The food crops are resistant to attacks by pests & diseases
• Pest & disease resistant crops Disadvantages

  Pest & disease resistant genes may be transferred to wild plants during breeding and upset the balance of the eco system
• Automobile Advantages

  Automobiles allow the transport of people & things to be quicker
• Automobile Disadvantages 


  Emissions from automobiles cause air pollution
• Styrofoam Advantages

  Styrofoam is used to make objects like food containers and keep the food warm for longer periods of time.
• Styrofoam Disadvantages

  Gases released during manufacturing contributes to global warming, and it cannot decompose naturally, polluting the enviroment.
• Test tube
• Beaker

  
• Erlenmeyer flask

  
• Volumetric flask

  
• Graduated cylinder

  
• Pipette

  
• Funnel

  
• Test tube stand

  
• Petri dish

  
• Glass rod

  
• Tongs

  
• Tripod for Bunsen burner