Dissolving

Julia is looking for examples of substances that will dissolve in water. She experiments with some things she finds in her kitchen at home. Which of these will NOT dissolve in water?

• salt
• sugar
• pepper
• coffee

Ruth wanted to surprise her family by making cookies. She found a recipe to make shortbread cookies. She needs butter, sugar, flour, baking powder, vanilla, and salt.
       

Which of the foods in Ruth’s recipe will NOT dissolve in water? 

• salt
• baking powder
• butter
• sugar

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

Anna filled a ​cup with hot tea. Then she added a sugar cube. ​Which of these will help to make the sugar cube dissolve more quickly? 

• stirring the hot tea
• adding more sugar cubes
• adding ice to the tea
• pouring more tea into the cup

Quentin made a poster showing some everyday substances. He plans to write the properties underneath each picture.
 
Which of Quentin’s choices will dissolve most quickly in water?

• oil
• soil
• sand
• sugar

Lonnie stirred some sugar into a pitcher of lemonade.

   
What happened to the sugar? 

• The sugar floated to the top surface
• The sugar disappeared after it was stirred.
• The sugar dissolved in the lemonade
• The sugar all settled to the bottom of the pitcher

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

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

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