Mixture and solution

When two or more substances combine, but each keeps its own properties, the new combination is called a(an)

• element

• mixture

• compound

• homogenous mixture

Which is an example of a solution?

• water

• salt

• oxygen

• air

Which is an example of a mixture made of parts that can easily be separated?

• cake (flour, eggs, sugar)

• snack mix (nuts, pretzels, and chips)

• water (hydrogen and oxygen)

• cement (sand, gravel, water)

Josh is designing a lab to separate a mixture of salt and water. He looks at all the ways to separate a mixture but decides that one way would work the best on this solution. What method should Josh use?

• filtering

• density

• evaporation

• magnetic attraction

The simplest form of all matter are small particles called

• atoms

• elements

• cells

• molecules

Carol accidentally dropped a container of salt (sodium chloride) into a container of a dark gray metal. Carol knows that the salt will dissolve in water, but she is afraid to pour water over the mixture. On a hunch, she takes a magnet and runs it through the mixture. The gray substance is attracted to the magnet and she is able to separate the two solids. What is the gray substance in the container?

• sodium chloride

• Copper

• aluminum

• Iron

A mixture is what you get when you combine two substances in such a way that no chemical reaction occurs between the components. A solution is a mixture that looks exactly the same everywhere. Which of these mixtures is a solution?

• a mixture of salt and sugar

• a mixture of sugar and water

• a fruit salad

• a chocolate chip cookie

A bucket of dirt! Dirt or soil is a mixture of many particles. Each kind of particle in a bucket of soil has unique properties. Here are four particles that make up soil. What property would you use to separate the four particles?

• Color

• minerals

• shape

• size

One way to separate certain mixtures, like sand and pebbles, is by using the method shown in this image. Which term best describes this method?

• evaporation

• filtration

• floatation

• magnetism

If the nuts and raisins pictured were combined, what would the mixture's total mass?

• 2 grams

• 6 grams

• 4 grams

• 8 grams