🧲 Filtration and Decanting
Master the techniques of filtration and decanting to separate solid particles from liquids and other solids in two-phase mixtures. This quiz explores particle size, filter media selection, and practical separation design for Grade 7 Earth Science. **What you'll learn:** - When and how to apply filtration and decanting techniques - How to select appropriate filter media based on particle size - Design separation procedures for different two-phase mixtures - Understand the science behind choosing the right separation method
Questions in this quiz
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- Question 1
Which of the following mixtures would be BEST separated using filtration?
- Question 2
What is the primary role of filter paper in a filtration process?
- Question 3
Decanting is a technique where you carefully pour off liquid from settled sediment without disturbing it.
- Question 4
When separating a mixture of gravel and water, which technique would be most effective and why?
- Question 5
Which particle size would require the finest filter paper to be trapped during filtration?
- Question 6
Filtration can separate any mixture into its pure components.
- Question 7
A student has a mixture of mud (fine soil) and water. Why might decanting alone be insufficient for complete separation?
- Question 8
Which of the following best describes the difference between a coarse filter and a fine filter?
- Question 9
When designing a separation procedure, it is important to consider the size of particles you want to separate.
- Question 10
A mixture contains sand (0.5 mm), clay (0.02 mm), and water. What is the most practical two-step separation procedure?
- Question 11
Why is it important to let a mixture settle before attempting to decant it?
- Question 12
Filtration and evaporation are equivalent techniques for separating a salt solution.
- Question 13
A laboratory technician needs to separate iron filings from sand. Which statement best explains the appropriate technique choice?
- Question 14
Which of the following statements correctly describes when filtration should be used instead of decanting?
- Question 15
A student designed a procedure to separate a two-phase mixture but forgot to account for particle size when selecting a filter. What is the most likely consequence?