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1. when a homemade oil and vinegar salad dressing is left standing, it separates into layers. the salad dressing is a?

solution,suspension, colloid, compound

2.which of the following is not an example of a physical property?

density, hardness, flammability, melting point

3. which material is a poor conductor of heat?

iron, wood ,silver, copper



Sagot :

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The salad dressing is known as a compound dressing. A compound is simply a combination, or mixture, of two or more ingrediants.
Physical properties include, density, hardness, melting, and boiling points. Flammability is considered a chemical property along with vapor, concentration, etc.
Wood is not a reliable conductor for heat, while Copper is considered the best.
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