P.5.B

A student mixed a tablespoon of orange-colored drink powder into a glass of water. After stirring for a few minutes, the student observed the mixture. Which observation would best provide evidence that the mixture IS a solution?

• The water became orange with nothing on the bottom of the glass.

• The water remained colorless with nothing on the bottom of the glass.

• The water became orange with some powder on the bottom of the glass.

• The water remained colorless with some powder on the bottom of the glass

A student plans to add a solid to a container of water. The student wants the solid to dissolve quickly. Which two actions would help the solid dissolve the most quickly into the water?

• placing a lid on the container after adding the solid

• crushing the solid into smaller pieces before adding it to the water

• placing the containerin a bowl of ice before adding the solid

• stirring the water after adding the solid

A student needs to separate a mixture composed of iron filings and sand. How can the student most easily separate all the iron filings from the mixture?

• Use filter paper to isolate the iron filings.

• Use a magnet to attract the iron filings.

• Add water to the mixture and pour off the floatingiron filings.

• Add water to the mixture and allow to evaporate and leave behindthe ironfilings.

Iron pins get mixed in a bag that holds sand and gravel. The table lists the properties of iron, sand, and gravel, Which methods will separate the three materials?

• sifting and floatation

• evaporation and filtration

• using a magnet and sifting

• using a magnet and filtration

Tags

NGSS.MS-PS1-2

A cook makes a salad by tossing vegetables, olive oil, and salt together. Why is the salad a mixture?

• The salad is a combination of more than two substances that can be separated,

• The substances used to make the salad cannot be separated from the salad.

• The taste of the substances increases as a part of the salad

• The mass of the salad is more than the mass of substances used to make it

Which is of the following is a FACT about both mixtures and solutions?

• Their molecules are mixed evenly.

• They can both be separated.

• They can separated by evaporation.

• They can be separated with a filter.

Mikey is making a solution of saltwater for a science experiment. What is the solvent?

• salt

• water

• ice

• the glass

Mixtures that do not blend smoothly throughout and the individual substances remain distinct

• Heterogeneous Mixture

• Homogeneous Mixture

• Solution

• Miscible

How can you separate a mixture of iron filings and sand?

• By adding water and filtering the mixture.

• By heating the mixture until the sand melts.

• Using a magnet to attract the iron filings.

• By adding acid to dissolve the sand.

Tags

DOK Level 2: Skill/Concept

A homogeneous mixture is the same thing as...

• a solution

• a heterogeneous mixture

• a compound

• an element