
Separating Mixtures
Authored by Melissa Winskill
Chemistry
7th - 8th Grade
NGSS covered
Used 93+ times

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13 questions
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1.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Which one of the following would you use to separate sand from iron filings?
a bar magnet
filter paper
chromatography paper
alum
Answer explanation
A bar magnet is used to separate iron filings from sand because the iron filings are magnetic and will be attracted to the magnet, while the sand will not. This makes the bar magnet the correct choice for this separation.
2.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Which tools are best for separating a mixtures of sand, iron filings, and water?
Hot plate and filter
Tweezers and filter
Filter and magnet
Magnet and hot plate
Answer explanation
To separate sand, iron filings, and water, use a magnet to attract the iron filings, then filter the mixture to separate the sand from the water. Thus, the best tools are a filter and a magnet.
3.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Which substances, when mixed together, maintain their original physical properties?
gravel and water
wood chips, water and sand
sand and water
all of the above
Answer explanation
All the substances listed—gravel and water, wood chips, water and sand, and sand and water—can be mixed without altering their individual physical properties, making 'all of the above' the correct choice.
4.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Which mixture can be separated using a filter?
sand and iron filings
saltwater
sand and water
none of the above
Answer explanation
The correct choice is 'sand and water' because when mixed, sand settles at the bottom and can be separated from water using a filter. In contrast, saltwater is a solution and cannot be separated by filtration.
5.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
True or False: Each part of a mixture keeps its properties when mixed.
True
False
Answer explanation
True. In a mixture, each component retains its individual properties, meaning they do not chemically change when combined. This is why mixtures can often be separated back into their original parts.
6.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
True or False: Mixtures can be separated by physical processes.
True
False
Answer explanation
True. Mixtures can be separated by physical processes such as filtration, distillation, or evaporation, as they retain their individual properties and do not form new substances.
7.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Lauren wants to separate salt from water. What separation technique should she use?
Distillation
Filtration
Chromatography
Answer explanation
Lauren should use distillation to separate salt from water because it involves heating the solution to evaporate the water, which can then be condensed back into liquid, leaving the salt behind.
Tags
NGSS.MS-PS3-3
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