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Substances and Mixtures Quiz

Authored by B P

Science

8th Grade

Used 2+ times

Substances and Mixtures Quiz
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5 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following best describes a pure substance?

A material made up of two or more different elements that are physically combined.

A material made up of only one type of atom or molecule.

A mixture of different compounds.

A solution of various elements.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which on of the following describes iron filings and sand?

Mixture

Compound

Element

Atom

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A student is given a sample and asked to determine if it is a compound or a mixture. What evidence would best support the conclusion that the sample is a compound?

The sample can be separated into its components by physical means.

The sample has a uniform composition throughout.

The sample consists of two or more substances that retain their individual properties.

The sample can be broken down into simpler substances by chemical means.

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following scenarios best illustrates the concept of a mixture?

Iron filings and sulfur being heated to form iron sulfide.

Salt dissolved in water.

Carbon dioxide being produced from the combustion of gasoline.

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A scientist is tasked with creating a model to demonstrate the differences between elements, compounds, and mixtures. Which of the following should be included in the model to accurately represent these differences?

Elements and compounds should be shown as having variable compositions.

Mixtures should be depicted as having fixed ratios of components.

Compounds should be represented as substances that can be separated by physical means.

Elements should be shown as pure substances consisting of only one type of atom.

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