Unit 2 - Chapter 3 Test

1. Sally is mixing ingredients for a salad dressing. She puts oil and vinegar in a jar and shakes them. She leaves the jar of oil and vinegar on the table until dinner. Which of the images below will show what her oil and vinegar mixture will look like?

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• 

2. Oil and vinegar is an example of ...

• a stable mixture
• an unstable mixture

3. Tell whether the following molecules will completely mix, mostly mix, slightly mix or not mix.

• completely mixed
• mostly mixed
• slightly mixed
• not mixed

4. Tell whether the following molecules will completely mix, mostly mix, slightly mix or not mix.

• completely mixed
• mostly mixed
• slightly mixed
• not mixed

5. Tell whether the following molecules will completely mix, mostly mix, slightly mix or not mix.

• completely mixed
• mostly mixed
• slightly mixed
• not mixed

6. Tell whether the following molecules will completely mix, mostly mix, slightly mix or not mix.

• completely mixed
• mostly mixed
• slightly mixed
• not mixed

7. Tell whether the following molecules will completely mix, mostly mix, slightly mix or not mix.

• completely mixed
• mostly mixed
• slightly mixed
• not mixed

8. The model shows substances that are...

• completely mixed
• mostly mixed
• slightly mixed
• not mixed

8.The molecules in this model are most likely...

• water and vinegar
• oil and lecithin
• lecithin and vinegar
• vinegar and oil

9. When molecules of a solid aren't attracted to molecules of a liquid they...

• spread apart and mix together evenly
• evaporate into the air
• stay clustered together as a solid