Group+2+Design+page


 * Group 2 Design page**


 * Level :** Secondary 2
 * Topic :** States of Matter

Students are to understand the heating and cooling curves for water
 * Learning outcomes (including use of basic skills and process skills):**

Prior Knowledge: Students should know 1. the properties of solid, liquid and gases 2. describe the arrangement and movement of the three states of matter

Data loggers Excel spread sheet (optional) Discussion forums
 * ICT tools:**

DESCRIPTION OF ACTIVITY For each feature, mark on the continuum if you are planning for more self-directed (SD) or more Teacher guided (TG) inquiry** || 1. What is the boiling point of water? 2. Design an experiment to determine the boiling point of water.
 * || **Description of activity:** || **Essential features of inquiry:
 * Question || Teacher to pose questions:

Students will be taught the key factors to consider in planning experiments example variables, apparatus, etc.) || a balance of TG and SD || They would then use spreadsheet software to plot the graph of Temperature Vs Time with the data obtained from their experiment. (Alternatively, they can print out the graph directly from datalogger.) || more SD ||
 * Evidence || Students are to determine the boiling point of water with the help of the dataloggers.
 * Explanation/ Communication || Students will be required to analyse the graph obtained and explain its shape based on the particulate model of matter. They will need to explain the changes of the particles in terms of their movement and arrangement as temperature rises as well as why the temperature remains constant during change of state. Their explanation would be posted on a discussion forum embedded with two youtube videos.

Students are to discuss any discrepancies in the graphs they obtained and the expected heating curve of water. (given)

Students will also be asked to compare the heating and cooling curve of water (given) and explain any similarities or differences.

Teacher will summarise the key learning points from the activity. Website: [] or []

__Extension to activity.__ ICT tools: Photo Story/ Microsoft Window Moviemaker Digital Camera Refer to edumall website [|www.edumall.sg] - Students may be prompted to explain why different substances have different boiling points and the significance of this value.

-Students can carry out another activity which requires them to videotape the process of evaporation and boiling for 5 minutes and based on their video, comment on the similarities and differences between the two processes. || more SD ||

Evaluation of Pupils' Learning:

- Students will be given worksheet with questions on heating and cooling curves to evaluate their understanding of graph and their ability to explain concepts. - Students may also be asked on the effect of impurity on boling point and melting point of pure substances.