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Alternative concept

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Alternative concept Presentation Transcript

  • 1. ALTERNATIVE CONCEPTIONS
    Prepared by:
    NorhayatiKhalid D20091034870
    Sakinah Ahmad Sukeri D20091034876
    MohdHelmeeHusin d20091034828
  • 2. Misconceptions of the Water Cycle According to their Drawings
  • 3. Scientific idea
  • 4. Level of students
    • The average age of students was 21.1 year (range 20-26).
    • 5. The majority of the participants were in their final semesters of undergraduate science education.
    • 6. Focus on the students university
  • Technique to elicit students’ ideas
    • Two methods used which are students` drawings and individual interviews.
    • 7. The students were asked to draw the water cycle on a blank piece of A4-sized paper.
    • 8. Students` responses to the drawing activity were analyzed using a coding framework prepared by and drawings dealt.
    • 9. Five levels of conceptual understanding were identified for this investigation: no drawing, non-representational drawings, drawings with misconceptions, partial drawings and comprehensive representation drawings.
    • 10. After the drawings were evaluated, individual interviews were conducted. The purpose was to check the validity of the interpretation of the drawings.
  • Eliciting ideas
    Level 1: No drawing: Students replied, I don`t know, or no response was given to the statement.
    Level 2: Non-representational drawings: These drawings were including identifiable elements of the water cycle. Also the answers, which include diagrams or formulations instead of the drawings, were evaluated in this category.
    Non-representational drawings
  • 11.
    • Level 3: Drawings with misconceptions: These types of drawings showed some degree of understandings on the water cycle concepts but also demonstrated some misconception.
    • Level 4: Partial drawings: The drawings were demonstrating partial understanding of the concepts. Includes the drawings of the water cycle elements like cloud, evaporation, raining and atmosphere
    • Comprehensive representation drawings: Drawings were the most competent and realistic drawings of the water cycle . Drawings showing sound understanding, contained seven or more elements of the validated response for that particular statement.
  • After the drawings were evaluated, individual interviews were conducted about the detailed subjects with randomly students were chosen. In the interview, students were asked to answer the questions like:
    What is the water cycle in your opinion?
    What are the effects of human activities on water cycle in your opinion?
    What do you think about starting and end points of water cycle?
    individual interviews
  • 12. Respondents alternative conceptions
  • 13. A drawing of misconceptions water cycle only includes freezing and melting processes of waterThe students interviewed stated that water cycle only includes freezing and melting processes of water . These students thought the influence of only non-living water atmospheres in the water cycle.
  • 14. A drawing of misconceptions of water cycle only includes the process of evaporation and condensation
    • Among students interviewed thought that water cycle is only the process of evaporation of water on the earth to the atmosphere and its return to the earth from the atmosphere by condensing
  • A drawing of misconceptions of water only evaporates from seas and oceans
    • Among students interviewed stated that water only evaporates from seas and oceans . One among students interviewed stated that rain falls when clouds are completely filled up with water.
  • Students alternative conceptions
    True
    False
    True
    Students think that water cycle is only evaporation of water on the earth to the atmosphere and its return to the earth from the atmosphere by condensing
    water cycle is only composed of the process of evaporation of water from the earth to the atmosphere and return to the earth from the atmosphere by condensing.
    Water only evaporates from seas and oceans.
    Evaporation is the process where a liquid, in this case water, changes from its liquid state to a gaseous state. Liquid water becomes water vapourand condensation is the process when a gas is changed into a liquid.
    Water cycle compose the process when the water evaporates, vapors rise and condense into clouds. The clouds move over the land, and precipitation falls in the form of rain, ice or snow. The water fills streams and rivers, and eventually flows back into the oceans where evaporation starts the process anew.
    Water can evaporates from many sources such as seas,oceans,lakes,rivers,streams, and others.
  • 15. THANK YOU