All Mixed Up - Review

What is a mixture?

• A material made of two or more different chemical substances which are chemically bonded.

• A material made of two or more different chemical substances which are not chemically bonded.

• A single chemical substance in solid form.

• A process of heating substances to a high temperature.

What is a homogeneous mixture?

• A mixture that can only be separated by chemical means.

• A mixture where individual particles are uniformly distributed throughout the mixture.

• A mixture where individual particles are not uniformly distributed.

• A mixture of only liquids.

Which of the following is an example of a heterogeneous mixture?

• Coffee

• Air

• Soda and its Ice

• Blood

Which physical property can be used to separate mixtures?

• Color

• Particle size

• Taste

• Smell

What separation method uses a sieve?

• Separating larger particles from smaller ones or from a liquid

• Separating using a magnetic field

• Separating based on density

• Separating by boiling point

How does magnetism separate substances in a mixture?

• By dissolving substances

• By boiling the mixture

• By using a filter paper

• By attracting magnetic particles away from non-magnetic ones

What happens during evaporation in the context of separating mixtures?

• A magnet attracts the dissolved substances.

• The liquid turns into a gas, leaving the dissolved substance behind.

• The mixture freezes and separates based on density.

• Particles are sorted by size using a sieve.

What is the role of density in separating mixtures?

• It determines the color of the mixture.

• Denser substances are pulled down, separating them from less dense ones.

• It makes the mixture magnetic.

• It changes the boiling point of the mixture.

What substance is a dark-colored, magnetic solid?

• Sugar

• Salt

• Iron Filings

• Sand

What is a characteristic of a substance that can be dissolved in water?

• It can be separated from the water by evaporation.

• It has a high density.

• It cannot be separated by evaporation.

• It is always magnetic.