Mixtures & Solutions

What has mass and takes up space?

• Condensation

• Matter

• Thoughts

• Melting

When two or more substances are mixed together, but do not chemically combine, what do we call it?

• mixture

• solution

• solute

• dilute

A mixture in which one thing completely dissolves in another is called.....

• mixture

• solution

• solute

• dilute

What are characteristics that can be seen or measured without being changed into something else.

• matter

• chemical properties

• mixtures

• physical properties

When you combine two materials and a new substance is created from those two things being combined, what happened?

• A liquid change occured

• A physical change occured

• A mixture was separated

• A chemical change occured

If you are wanting to separate a mixture, what is the most important thing to consider?

• How much water is in the mixture

• If the atoms have changed in the mixture

• What kind of materials are in the mixture

• If the mixture went through a chemical change

What method would be most helpful in separating sand and water?

• chromatography

• filtration

• sifting

• magnetic attraction

In a mixture, there are paper clips, rocks, sand, and beads. A magnet hovers over the mixture and picks up the paper clips, but nothing else. What is the best reason the magnet separated ONLY the paper clips?

• Only the paper clips are made of plastic.

• The paper clips are longer than the other items.

• Only the paper clips are made of iron.

• The paper clips are lighter than the other items.

Which of these could be best separated by a sifter?

• a mixture of big and small beads

• a mixture magnetic filings and sand

• a solution of salt water

• a mixture of glass beads and plastic beads

When would floatation be the best method to use when separating two substances mixed together?

• when one substance is dissolved in the other to make a homogenous solution

• when one substance is attracted to a magnet but the other is not

• when one substance is a liquid and the other is a gas

• when one substance is less dense than a liquid and the other is more dense