Materials

What is the property of a material that allows it to be stretched without breaking?

• Tensile strength

• Ductility

• Elasticity

• Flexibility

In which state of matter do particles have the most energy and move freely?

• Solid

• Liquid

• Gas

• Plasma

What is a mixture?

• A mixture is a pure substance with a fixed composition.

• A mixture is a substance formed by a chemical reaction.

• A mixture is a substance that cannot be separated into its components.

• A mixture is a substance made by mixing other substances together without a chemical reaction occurring between them.

Give an example of a physical change.

• Burning paper into ashes

• Melting ice into water

• Boiling water into steam

• Freezing water into ice

How is a chemical change different from a physical change?

• Chemical changes result in the formation of new substances with different chemical properties, while physical changes only affect the state or appearance of a substance.

• Chemical changes involve changes in temperature, while physical changes do not.

• Chemical changes are reversible, while physical changes are irreversible.

• Chemical changes only affect the state or appearance of a substance, while physical changes result in the formation of new substances.

What is an example of a material that is a good conductor of electricity?

• Aluminum

• Gold

• Plastic

• Copper

Explain how a solution is different from a mixture.

• A solution is a physical combination of substances.

• A mixture is a homogeneous combination of substances.

• A solution is a heterogeneous mixture where substances dissolve in each other.

• A solution is a homogeneous mixture where substances dissolve in each other, while a mixture is a physical combination of substances.

What are some uses of glass as a material?

• Glass is used in construction materials

• Glass is used in windows, bottles, mirrors, lenses, light bulbs, and smartphone screens.

• Glass is used in food packaging

• Glass is used in clothing

What happens to the particles in a material when it changes from a solid to a liquid?

• Particles become more rigid

• Particles shrink in size

• Particles lose energy

• Particles gain enough energy to overcome intermolecular forces and move more freely.

How can you separate a mixture of sand and water?

• Evaporation

• Filtration

• Sublimation

• Decantation