What is in the test tubes?

What is in the test tubes?

Pencil and paper
Overview
Using this Resource
Connecting to the Curriculum
Marking Student Responses
Further Resources
This task is about reading diagrams for mixtures, solutions and pure substances.
 
test tube with water particles test tube with methylated spirits particles test tube with lots of water and dissolved solid particles test tube with water and dissolved solid particles test tube with water, dissolved solid particles and some undissolved solid particles test tube with water and undissolved solid particles      

Key

 water particle

 methylated spirits particle

 dissolved solid particle

 undissolved solid particle
A
 		 B
 		 C
 		 D
 		 E
 		 F
 		  
 
a)
Which test-tube(s) contain:
 
 
i)
 
ii)
 
iii)
 
iv)
 
pure water? __________
 
an undissolved solid in water? __________
 
mixtures? __________
 
the most dilute solution? __________
 
b)
Filtration is filtering of solid particles from a liquid and evaporation is the change of state from a liquid to a gas.
Which test-tube(s) contents could be separated by
 
 
i)
 
ii)
 
filtration? __________
 
evaporation? __________
 
c) Using the same symbols as in the key above, complete these test-tube(s) to represent.
 
i)
    blank test tube for drawing symbols
ii)
    blank test tube for drawing symbols
iii)
   blank test tube for drawing symbols
iv)
   blank test tube for drawing symbols
methylated spirits and water sand and water sand, salt and water copper sulfate solution
Task administration: 
This task can be completed with pencil and paper.
Level:
5
Curriculum info: 
Science, Communicating in science, Material World
Keywords: 
structure of matter, mixtures, solutions, pure substances, diagrams
Description of task: 
Students interpret the diagrams of mixtures, solutions, and pure substances. Then they draw diagrams to represent other combinations of substances.
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 to discuss how to use a key to interpret information.
Science capabilities: 
Interpret representations
Answers/responses: 
   Y10 (05/1999)
a) i)
ii)
iii)
iv)		 A
F, or F and E
Any three of C, D, E, F
D		 very easy
very easy
moderate
difficult
b) i)
ii)		 F
Any three of C, D, E, F		 moderate
difficult
c)          i)              ii)              iii)              iv)

        

[Note: Can have solid on the bottom in iv).]

 i) – very easy

ii) – very easy

iii) – very easy

iv) – difficult