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Chapter 3
Grade 7
| Question | Answer |
|---|---|
| The best way to separate a physical mixture of wood chips is and iron nails is to use.. | A magnet |
| The best way to separate a mixture of sand and sugar is to... | Dissolve it |
| Petroleum pumped from the ground is refined best using... | Distillation |
| Can a magnet be used to separate metal from a mechanical mixture? | Yes it can |
| Can any mixture be separated when the right technique is used? | Yes it can |
| Does separating sewage help protect the environment from pollution | Yes it does |
| Can complex mixtures be separated with one technique | No it cannot |
| Explain why the ocean is not a pure substance | The ocean has a mixture of water, minerals and salt |
| Define distillation | The action of purifying a liquid by heating and cooling |
| Define evaporation | The process of turning liquid to vapor |
| 2 reasons why petroleum is hard to refine | Leaks and spills can damage the surrounding environment and explosions are a risk. |
| What is the simplest way to separate a mechanical mixture? | Sorting |
| What is a sieve? | A sieve is a tool with holes in the center. The holes are then then used to separate small things from big things |
| Use of a magnet? | A magnet is used to separate magnetic things from non-magnetic things, like sand and iron. |
Created by:
Fruittytutty101
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