Separating Mixtures Quick Check
Science 8 Q1 / Properties of Matter
A scientist is working in a lab and accidentally combines two liquids that quickly form a solution. Which process could be used to separate the two liquids?(1 point)
Responses
passing the liquids through a filter to collect one of them
waiting for the two liquids to separate
collecting one of the liquids with a spoon
heating the liquids and letting one boil away first
waiting for the two liquids to separate
Which property could allow a student to easily separate sand and iron filings?(1 point)
Responses
solubility
boiling point
magnetism
melting point
magnetism
Separating Mixtures Quick Check
Science 8 Q1 / Properties of Matter
You are worried that a solid substance has dissolved in a beaker of water in a lab. What would be a way to separate the substance from the water?(1 point)
Responses
Pass the solution through a filter to let the dissolved substance separate.
Boil the water away, leaving the substance behind in the beaker.
Pour the liquid along a rough surface that would catch the solid particles but not the water.
Use a magnet to draw out the solid substance from the water.
Boil the water away, leaving the substance behind in the beaker.
Separating Mixtures Quick Check
Science 8 Q1 / Properties of Matter
A beaker contains a mixture of sand and salt. A student adds water to dissolve the salt. Which processes can be used to separate out the sand and salt?(1 point)
Responses
filtration to collect the sand and distillation to collect the salt
filtration to collect both the sand and the salt
distillation to collect the sand and filtration to collect the salt
distillation to collect both the sand and the salt
filtration to collect the sand and distillation to collect the salt
Synthetic Materials, Natural Resources Quick Check
Science 8 Q1 / Properties of Matter
Which option is a natural material that is not a fossil fuel?(1 point)
Responses
cotton
vinyl
petroleum
natural gas
cotton
To separate two liquids that have formed a solution, the most suitable process would be to heat the liquids and let one boil away first. This process is called distillation. Here's how you can explain it:
Distillation is a process used to separate two or more liquids with different boiling points. In this case, the scientist can heat the mixture of liquids and as they reach their individual boiling points, the liquid with the lower boiling point will start to vaporize and turn into steam. The steam can then be condensed and collected as a separate liquid, while the liquid with the higher boiling point remains behind.
This process is effective because different substances have different boiling points, which causes them to vaporize and condense at different temperatures. By carefully controlling the heat and using specialized equipment, the scientist can collect the desired liquid while leaving behind the other liquid in the original container.
Therefore, in this situation, the scientist can separate the two liquids by heating them and allowing one to boil away first.