Mixtures & Solutions

Mixtures

100

Give an example of a mixture.

Sample: Salad

200

TRUE or FALSE: All solutions are mixtures, but not all mixtures are solutions.

TRUE

300

A mixture of beads was placed in a container. The beads are of various sizes, and each one is made of plastic, glass, or steel. The mixture would be easy to separate because all the beads______. A) Are less dense than water B) Are solids C) Have the same mass

B) Are solids

400

What is the difference between a mixture and a solution? A) They are the same B) In a mixture, the physical properties of the ingredients change, while they don't in a solution C) In a solution, the physical properties of the ingredients change, while they don't in a mixture

C) In a solution, the physical properties of the ingredients change, while they don't in a mixture

Solutions

100

Give an example of a solution.

Sample: Salt water

200

TRUE or FALSE: Solutions and mixtures are the same.

FALSE

300

A teacher mixes a white powder into a beaker of water. The powder cannot be seen in the water. The teacher then heats the mixture until the water evaporates and the powder can be seen again. Which property of the powder is the teacher demonstrating? A) Solubility B) Density C) Conductivity

A) Solubility

400

How would you separate a solution of sugar and water? A) You evaporate the sugar and the water is left behind B) You evaporate the water and the sugar is left behind C) You use a sifter

B) You evaporate the water and the sugar is left behind

Density

100

Mass, volume, and density are_______. A) Like weight B) Take up about the same space. C) Properties of matter.

C) Properties of matter

200

Which has a greater density, oil or water?

Water

300

A student created a mixture by stirring a tub of water with paperclips, sand, and wooden cubes. Which of the following does NOT represent the most useful way to remove one of the objects from the mixture? A) Use a magnet to pick up paperclips B) Use your hand to pick up the sand C) Use a strainer to filter out the sand

B) Use your hand to pick up the sand

400

Why is density an important property of matter? Explain your thinking.

Sample: Scientists can use their data to know what kind of materials are best for different purposes, according to their densities.

Vocabulary

100

Define 'mass' in your own words.

Sample: The amount of matter in an object or substance.

200

Define 'mixture' in your own words.

Sample: A combination of two or more substances that do not form a new substance.

300

Define 'density' in your own words.

Sample: The amount of mass in a known volume of an object or substance.

400

Define 'solution' in your own words.

Sample: A mixture with one substance spread out so evenly in another substance that you cannot tell the two substances apart.