NS Term 2 Unit 2 Part 2: Separating mixtures Flashcards
What happens in some mixtures?
The materials are clearly visible.
What happens in other mixtures?
One material seems to disappear.
What is easier to separate?
Separate substances that we see clearly.
What 4 methods can we use to separate mixtures?
- Sieving
- Filtering
- Hand sorting
- Settling/decanting
What is hand sorting?
Hand sorting is picking out one material and separating it from the other.
What mixtures are best for hand sorting?
With large solids, like:
- Coins and beans
- Beans and peanuts
What does hand sorting involve?
Hand sorting involves the following:
- Pouring mixture onto newspaper/plastic
- Using fingers/ a pair of tweezers
- Picking materials out from one another
What does “Using a sieve” refer to?
“Using a sieve” refers to the method of pouring mixtures through a sieve to separate small solids from larger ones.
What does “Using a sieve” involve?
“Using a sieve” involves the following:
- Pouring the mixture through a sieve into a bowl.
- Shaking the sieve so the smaller material falls through.
What does settling and decanting refer to?
Settling refers to letting the mixture settle (or sit) and waiting for it to separate on its own.
What mixtures are best for settling and decanting?
- Sand and water
2. Oil and water
What does settling and decanting involve?
Settling and decanting involves the following:
- Stirring the mixture
- Leaving it in its container
- Allowing it to stand until the materials separate
- Carefully pouring the top material off the other material.
What is filtering?
Filtering is a method when some mixtures are separated by pouring the mixture them through paper/other materials.
What mixtures are best for filtering?
- Sand and water
2. Curry powder and water
What does filtering involve?
Filtering involves the following:
- Placing a funnel in a bottle
- Placing filter paper in the funnel
- Pouring the mixture through it
- Allowing the liquid material to flow through the filter
