6.6 Exploring States and Properties of Matter

Compare the structure of solids, liquids, and gases. Which of the following statements is true?

• Solids have a fixed shape and volume, while gases have a fixed shape but no fixed volume.

• Liquids have a fixed volume but take the shape of their container, while gases have neither a fixed shape nor a fixed volume.

• Solids and liquids both have fixed shapes, but gases do not.

• Gases have a fixed volume but no fixed shape, while liquids have neither a fixed shape nor a fixed volume.

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TEKS.SCI.6.6A

Which of the following best describes a homogeneous mixture?

• A mixture where the components are visibly distinct.

• A mixture where the components are evenly distributed and not visibly distinct.

• A mixture that contains only one type of atom.

• A mixture that can be separated by physical means.

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TEKS.SCI.6.6B

Identify the element that is a metalloid from the periodic table.

• Oxygen

• Silicon

• Iron

• Helium

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TEKS.SCI.6.6C

Which of the following substances would float on water based on their density?

• Iron (density = 7.87 g/cm³)

• Cork (density = 0.24 g/cm³)

• Aluminum (density = 2.70 g/cm³)

• Gold (density = 19.32 g/cm³)

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TEKS.SCI.6.6D

Which of the following is evidence of a chemical change?

• Melting of ice

• Dissolving sugar in water

• Rusting of iron

• Boiling of water

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TEKS.SCI.6.6E

Explain why gases have higher kinetic energy compared to solids.

• Gases have more mass than solids.

• The particles in gases move more freely and rapidly than in solids.

• Solids have more energy stored in their bonds.

• Gases are always at a higher temperature than solids.

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TEKS.SCI.6.6A

How can you distinguish between a pure substance and a mixture?

• A pure substance can be separated into its components by physical means.

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

• A pure substance has a uniform and definite composition, while a mixture does not.

• A mixture is always a liquid, while a pure substance is always a solid.

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TEKS.SCI.6.6B

Why are metals important in modern life?

• They are poor conductors of electricity.

• They are used in making glass and ceramics.

• They are good conductors of heat and electricity, making them essential for electrical wiring and electronics.

• They are used only for decorative purposes.

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TEKS.SCI.6.6C

If a substance has a density of 1.2 g/cm³, will it float or sink in water, and why?

• It will float because its density is less than water.

• It will sink because its density is greater than water.

• It will float because its density is equal to water.

• It will sink because its density is less than water.

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TEKS.SCI.6.6D

Which of the following scenarios indicates a chemical change has occurred?

• A piece of paper is cut into smaller pieces.

• A sugar cube dissolves in water.

• A piece of wood burns and turns to ash.

• Water freezes to form ice.

Tags

TEKS.SCI.6.6E