Dissolving and Mixing Substances Review

The hot water changes into coffee.

The instant coffee breaks down into tiny particles that are no longer visible.

The coffee is dark so the particles are hidden.

The instant coffee floats inside water bubbles.

Sand

Salt

Oil

Chalk

Cold water

Hot water

Salty water

Distilled water

They become solid and stop moving.

They move more quickly as they gain energy.

They lose energy and move less.

They remain unchanged.

Oil and syrup

Juice and oil

Syrup and soap

Juice and soap

Salt will dissolve more quickly.

Salt will not dissolve at all.

Salt will dissolve more slowly.

The temperature of salt will decrease.

Condensing

Dissolving

Boiling

Melting

Mix different solids with water and see which ones remain undissolved.

Mix different solids with vinegar and observe.

Heat the solids in a pan and watch them melt.

Freeze the solids and see if they change shape.

The sugar in the warm water will dissolve faster.

The sugar in the cold water will dissolve faster.

The sugar will not dissolve in either glass.

The sugar will dissolve at the same rate in both glasses.

Comparing the color of water after adding food coloring to hot and cold water.

Stirring equal amounts of salt into hot and cold water and timing how long each takes to dissolve.

Adding different amounts of salt to cold water and observing the results.

Mixing sugar into oil and water to see which one dissolves faster.