Classroom Chemistry Review

What is a mixture?

• A single substance that is hard to separate

• A combination of two or more substances that are not chemically combined

• A chemical reaction between two substances

• A solid item that cannot be dissolved in a liquid

Can we separate parts of a mixture?

• No, it's impossible to separate them

• Yes, but only through chemical reactions

• Yes, because the substances are not chemically combined

• No, because mixtures are always solid

What does it mean to dissolve a substance into a liquid?

• To make the substance disappear completely

• To mix a substance with a liquid until it forms a solution

• To freeze a substance into a liquid

• To boil a substance into a liquid

When have you dissolved something into a liquid?

• When I mixed oil and water

• When I froze water into ice

• When I added sugar to water and it disappeared

• When I cooked pasta in water

Tags

NGSS.5-PS1-4

What is a solution in chemistry?

• A type of mixture where one substance is separated from another.

• A type of mixture where one substance is dissolved into another.

• A solid substance that cannot be dissolved.

• A liquid that dissolves all types of substances.

Which of the following is an example of a homogeneous solution?

• Cereal in milk where you can see both substances.

• Chocolate syrup mixed uniformly in milk.

• Oil and water mixture.

• Sand mixed in water.

What does it mean if a mixture is homogeneous?

• The mixture has visible layers of different substances.

• The components of the mixture are not uniformly distributed.

• The components that make up the mixture are uniformly distributed throughout the mixture.

• The mixture contains only one substance.

Why can't a heterogeneous mixture be a solution?

• Because the substances in a heterogeneous mixture dissolve into each other.

• Because a solution can only be made of solid substances.

• Because in a heterogeneous mixture, the substances do not dissolve into each other.

• Because a solution can only be liquid.

What is a mixture?

• A chemical reaction where one substance dissolves into another.

• A substance made from mixing two or more substances together without a chemical reaction.

• A type of mixture where two substances combine and cannot be separated.

• A reaction that occurs when a solid turns into a liquid.

What is a solution?

• A mixture where the components can be easily separated back into their original materials.

• A substance made from mixing two or more substances together, resulting in a new chemical product.

• A type of mixture where one substance dissolves into the other and cannot be separated.

• A solid substance that has been melted into a liquid.