P.5.5B Mixtures

When salt, sugar, and hot water are stirred together, a _______ is created because the salt and sugar completely _________ in the water, changing some of water's properties such as taste.

• molecule, combine

• mixture, combine

• solution, dissolve

• mixture, oxidize

Tags

NGSS.MS-PS1-2

A group of students combined the following items in a bowl.

• Peanuts

• Pretzels

• M&M’s

• Raisins

• 
  What type of combination did the students create?
  

• mixture

• compound

• solution

• element

Combining red and blue paints to make a purple paint is an example of what?

• a solution

• a mixture

Holly stirred 2 liters of water with 3 packets of lemon flavoring.  When Holly tasted the solution, it was too sour.  In order to decrease the concentration of lemon flavoring in her solution, Holly will need to  ________________.

• stir the solution harder

• add more lemon flavoring

• filter out the lemon flavoring

• add more water

The sugar in the spoon is called the _______ in this solution.

• dissolve

• solute

• solvent

• rate

Mrs. Hutson's science students were dissolving sugar cubes in water to understand things that impact how fast (rate) sugar would completely dissolve in the water.

Which approach could be used to slow down how fast the sugar cubes completely dissolved?

• heat the water to its boiling point

• decrease the water's temperature

• grind the sugar into very small pieces

• stir the solution at a faster rate

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

A group of students collected a bucket of water from a neighboring pond to analyze.  The students noticed the bucket had dirt, sand, and wood particles at the bottom.  A ________ system would allow the students to quickly analyze the water by separating it from the particles in the bucket.

• magnetic

• floatation

• evaporation

• filtration

Tags

NGSS.MS-PS1-2

James' mother lost her favorite steel ring down the kitchen drain when she was washing dishes.

Which of the following properties of matter could James use to retrieve the ring?

• evaporation

• magnetism

• floatation

• filtration

Ocean water contains dissolved salt (NaCl); however, it is possible to separate the salt from the water.

Which technique would be the BEST way to separate the salt from the water?

• Sift the salt out of the water with a kitchen strainer (i.e., a sieve).

• Filter the salt out of the water with filter paper.

• Use a magnet to attract the salt molecules.

• Apply heat to evaporate the water leaving the salt.

A scientist wants to change the concentration of two identical solutions.  She adds a solute to one of the solutions, _______ the concentration.  She adds solvent to the other solution,  _______ the concentration.

• decreasing, not changing

• increasing, decreasing

• not changing, increasing

• decreasing, increasing