Will It Dissolve?
Mia puts a spoonful of sugar into warm water and stirs. The sugar seems to disappear. What happened?
It dissolved
Which will dissolve sugar faster: hot water or cold water?
Hot water
What do we call it when two or more materials are put together?
A mixture
Which will dissolve in water: pebbles, sand, sugar, or plastic?
Sugar.
Which would most likely dissolve in water: salt, pebbles, sand, or plastic beads?
Salt
You have two cups with the same amount of water. One is warm and one is cold. You add the same amount of salt to each. In which cup should the salt dissolve faster?
The warm water.
What happens when you put sand and small rocks together in a cup?
They form a mixture.
What happens when salt is stirred into water and can no longer be seen?
The salt dissolves and forms a solution.
Carlos puts salt in one cup and sand in another cup. He adds water and stirs both. What will he probably observe?
The salt dissolves, but the sand does not.
Emma puts one spoonful of sugar into a cup of cold water. She wants the sugar to dissolve faster. What could she do?
Use warmer water
What will happen after you mix oil and water and let it sit?
The oil and water will separate into layers
What can you do to help sugar dissolve faster in water?
Stir it.
If you can no longer see sugar after stirring it into water, does that mean the sugar is gone? Explain.
No. The sugar has dissolved and is still mixed with the water.
A scientist wants to compare how quickly sugar dissolves in hot and cold water. Name one thing that should stay the same.
Amount of sugar OR amount of water.
Which two liquids will mix together: oil and water or vinegar and water?
Vinegar and water
Two cups have the same amount of water and sugar. One cup has warm water, and the other has cold water. Which will dissolve the sugar faster?
The warm water.
Liam adds the same amount of salt to two cups of water. He stirs Cup A but does not stir Cup B. What will most likely happen? Which one will dissolve faster?
The salt in Cup A will dissolve faster because stirring helps a solid dissolve faster.
Two students test whether temperature affects dissolving. Cup A has 1 spoon of sugar, and Cup B has 4 spoons. Why isn't this a fair test?
They changed the amount of sugar. The amount of sugar should stay the same.
A student mixes paper clips, sand, and small rocks together. Is this a mixture, and how do you know?
Yes. It is a mixture because different materials are combined, and they don't change.
You keep adding sugar to water until some sugar stays at the bottom. Why did it stop dissolving?
The water has reached its limit and cannot dissolve any more sugar.