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Identification

Authored by Lloyd Lawrence H. Aledo

Science

7th Grade

Used 14+ times

Identification
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11 questions

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1.

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1 min • 1 pt

A ________ is a substance made up of two or more different chemical elements combined in a fixed ratio.

2.

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1 min • 1 pt

A _______ is a mixture in which one substance consisting of microscopically dispersed insoluble particles is suspended throughout another substance. Some definitions specify that the particles must be dispersed in a liquid, while others extend the definition to include substances like aerosols and gels.

3.

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1 min • 1 pt

___-_____ are located on the extreme right of the periodic table.

4.

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1 min • 1 pt

___________ happens when a liquid turns into a gas. It can be easily visualized when rain puddles “disappear” on a hot day or when wet clothes dry in the sun.

5.

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1 min • 1 pt

An ____ is any substance that in water solution tastes sour, changes blue litmus paper to red, reacts with some metals to liberate hydrogen, reacts with bases to form salts, and promotes chemical reactions.

6.

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1 min • 1 pt

A _______ is made when two or more substances are combined, but they are not combined chemically.

7.

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1 min • 1 pt

____________ is the process in which bacteria in the soil use oxygen to change compounds of nitrogen in dead plant material into nitrates which plants can then absorb as food.

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