Pure Substances and Mixtures (TEKS 6.6.B) Quiz

Which group of particles shows a model of a pure substance?

• Model A

• Model B

• Model C

• Model D

Tags

NGSS.MS-PS1-1

Students examine an experimental setup to determine if what is shown is a mixture or a pure substance.

• Magnets can cause a pure substance to separate into atoms.

• The mixture contains substances with different physical properties.

• A pure substance may contain particles with different physical properties.

• The magnet can cause substances in a heterogeneous mixture to separate.

• The magnet can cause physical properties of a homogeneous mixture to change.

Tags

NGSS.MS-PS1-2

Johnny and Maria developed a scientific procedure for separating a mixture of salt and sand. Which piece of equipment is MOST LIKELY to be used in the first step of their procedure for separating the salt and sand?

• magnet

• hot plate

• beaker of water

• funnel with filter paper

Why is this solution of tea considered a homogeneous mixture?

• The solution is a liquid.

• The solution changes color by heating.

• The substances can be separated by heating the solution.

• The substances are mixed evenly throughout the solution.

Which of the following best describes a heterogeneous mixture?

• A mixture that forms a new substance

• A mixture that cannot be separated by physical means

• A mixture where the different components are easily seen

• A mixture with substances evenly distributed throughout

What is the main difference between a mixture and a pure substance?

• A mixture always has a fixed composition, while a pure substance does not.

• A pure substance can be separated by filtration, but a mixture cannot.

• A mixture can be separated by physical means, but a pure substance cannot.

• A mixture contains only one type of particle, while a pure substance contains more than one type.

Which method would be MOST effective for separating iron filings from a mixture of iron filings and sugar?

• Distillation

• Evaporation

• Filtration

• Using a magnet

What is a characteristic of a homogeneous mixture?

• The components are not evenly distributed

• The components can be seen easily

• The mixture forms a new substance

• The mixture has a uniform appearance throughout

Which of the following is an example of a pure substance?

• Air

• Salt water

• Soil

• Iron

Which of the following is a characteristic of a pure substance?

• It contains two or more types of particles

• It has a fixed composition and definite properties

• Its components are easily seen

• It can be separated into simpler substances by physical means