Mixtures and separation
Grade 6: pure substances and mixtures, dissolving, filtering, evaporation, solutions.
Free to play. Teams answer on one screen; your phone is the remote. No student devices.
Questions
Which of these is a pure substance?
- Air
- Distilled water
- Fresh orange juice
- Sea water
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Distilled waterA mixture contains two or more substances that are not chemically joined. (True or false?)
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TrueWhich of these is a mixture?
- Gold
- Oxygen
- Pure salt
- Salad
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SaladWhat word describes a substance, such as sugar, that can dissolve in a liquid? (Answer out loud)
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SolubleIn salt water, which part is the solvent?
- Both of them
- Neither of them
- The salt
- The water
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The waterWhich change usually helps sugar dissolve faster in water?
- Cooling it to freezing
- Leaving it still
- Stirring it
- Using bigger lumps
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Stirring itWhich mixture can be separated by filtering?
- Ink and water
- Salt and water
- Sand and water
- Sugar and water
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Sand and waterIn filtering, what is the liquid that passes through the filter paper called? (Answer out loud)
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The filtrateSand and salt are stirred into water, then filtered. What is the filtrate?
- Dry salt crystals
- Pure water
- Salt water
- Sand
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Salt waterFiltering is a good way to get dissolved salt back out of salt water. (True or false?)
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FalseWhich method gets salt from salt water?
- Evaporation
- Filtering
- Sieving
- Using a magnet
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EvaporationDuring evaporation, what happens to the water?
- It is destroyed
- It turns into a gas
- It turns into a solid
- It turns into salt
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It turns into a gasA solution is made of a solute and what else? (Answer out loud)
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A solventA solution looks the same all the way through, and the solute cannot be seen. (True or false?)
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TrueA solution that cannot dissolve any more solute at that temperature is called…
- Diluted
- Evaporated
- Insoluble
- Saturated
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SaturatedTo get pure water from salt water and keep the water, you would use…
- Distillation
- Filtering
- Magnetism
- Sieving
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Distillation