Three ways to separate mixtures

Three ways to separate mixtures

Pencil and paper
Overview
Connecting to the Curriculum
Marking Student Responses
Working with Students
With a large sieve With a magnet By evaporation

A teacher mixed different things together. Choose the best way to separate each mixture from the list above. The first one is done for you.
  
Mixture Best way to separate the mixture
a) Rocks and soil. With a large sieve.
b) Sugar and water.  
c) Flour and peanuts.  
d) Metal paper clips and plastic paper clips.  
e) Salt and water.  
f) Metal needles and sawdust.  

 

Level:
2
Curriculum info: 
Science, Knowledge, Material World
Keywords: 
properties, mixtures, separation of mixtures
Description of task: 
Students select the most appropriate method that could be used to separate five different mixtures.
Answers/responses: 
  

Y4 (06/99)
b) Evaporation moderate
c) Sieve easy
d) Magnet easy
e) Evaporation moderate
f) Magnet moderate

 

Diagnostic and formative information: 
  Common error
b) Sieve – 18% of students.
Magnet – 5% of students.
Other or no response – 12% of students.
c) Magnet – 11% of students.
Evaporation – 10% of students.
Other or no response – 15% of students.
d) Evaporation – 10% of students.
Sieve – 4% of students.
Other or no response – 12% of students.
e) Sieve – 26% of students.
Magnet – 1% of students.
Other or no response – 14% of students.
f) Sieve – 30% of students.
Evaporation – 7% of students.
Other or no response – 14% of students.