Fresh water from sea water

Fresh water from sea water

Pencil and paperOnline interactive
Overview
Using this Resource
Connecting to the Curriculum
Marking Student Responses
Further Resources
This task is about changes in state of water.

Question 1Change answer

ARB6773 distillation diagram.png
 
This apparatus was set up to separate and collect fresh water from sea water. There are three changes of state (e.g., solid  liquid) occurring in this diagram.
What are these changes, and where are they occurring?
 
Change of state
Where the change is occurring
i)
ii)
iii)
Task administration: 
This task can be completed with pencil and paper or online.
Level:
5
Curriculum info: 
Science, Communicating in science, Material World
Key Competencies: 
Using language, symbols, and texts
Keywords: 
changes, changes of state, water
Description of task: 
Students identify the changes of state that are occurring in a diagram showing the separation of fresh water from seawater.
Curriculum Links: 
Science capabilities
The capabilities focus is brought about by the conversations you have and the questions you ask.
 
Capability: Interpret representations
This resource provides opportunities to discuss using diagrams of models that represent a science idea 
 

Capability: Using Evidence
This resource provides opportunities to discuss using evidence from a diagram to make inferences
Science capability: Using Evidence (Tāhūrangi)
 
 
Science capabilities: 
Interpret representations
Answers/responses: 
   Y10 (05/1999)
Any order:

  • liquid gas in the conical flask
  • gas    liquid (in the tube) inside the wet paper towel
  • solid  liquid in the beaker

[NOTE: Accept name of change, e.g., liquid gas/evaporation].

 3 correct – very difficult

2 correct – moderate

1 correct – easy