Rate of Dissolving - LIME Test

Mark and Susan added salt to a flask of water at 9:05 A.M. 
   

What happened in the next 2 minutes? 

• The salt disappeared
• the salt dissolved in the water
• The temperature of the water increased.
• The salt settled to the bottom of the flask

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

Darla put some sugar in a pitcher of iced tea.
 

Why is Darla stirring the iced tea? 

• Stirring makes the iced tea colder
• Stirring makes the sugar dissolve more quickly
• Stirring keeps the sugar from forming into larger pieces
• D - The sugar will not dissolve unless she stirs the iced tea

Rey is making soup. He will dissolve cubes of instant soup mix in hot water.
How can Rey make the soup cubes dissolve more quickly in the water? 

• use less water
• use more water
• add ice cubes to cool the water
• break the soup cubes into smaller pieces

Tags

NGSS.HS-PS1-5

Sharla is using powdered mix to make hot chocolate. She will boil some water and then stir in the mix.
       

What is the best way to make the powdered mix dissolve more quickly? 

• use cold water
• use more water
• stir the mix more quickly
• stir the mix for a longer time

Tags

NGSS.MS-PS3-4

Ernesto and Amanda fill two cups with water. They use hot water in one cup and cold water in the other cup. Next, they will stir a spoon of salt into each cup.     

In which cup will the salt dissolve more slowly? 

• The salt will not dissolve in either cup
• The salt dissolves more slowly in the hot water
• The salt dissolves more slowly in the cold water
• The salt dissolves at the same speed in both cups

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Aliria and Charlie each dropped a sugar cube into a beaker of water. Aliria’s sugar cube dissolved faster.
     
What could be a reason that Aliria’s sugar cube dissolved faster? 

• Charlie used more water than Aliria
• Charlie stirred the water and Aliria did not
• Aliria used warmer water than Charlie
• Aliria used a larger cube of sugar than Charlie

Tags

NGSS.MS-PS1-4

Hana put the same amount of salt into these two beakers of water. She stirred them into the same amount of water.
 
In which beaker does the salt dissolve more quickly? 

• Beaker A because the temperature is lower
• Beaker B because the temperature is higher
• The salt dissolves at the same speed in both beakers
• The salt does not dissolve in either beaker. It sinks to the bottom

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Bina and Laurent used some sugar cubes to make lemonade.
       
How can they make the sugar dissolve more quickly?

• use more sugar cubes
• avoid stirring the lemonade
• add ice cubes to the lemonade
• break the cubes into smaller pieces

What is a substance that is dissolved in another substance? 

• solution
• solute
• solvent
• compound

What does it mean to be "Soluble" ?

• Capable of being a solid.
• To have soul.
• Capable of being dissolved.
• To sink.