The layer air that surrounds the earth is called _________________.
atmosphere
_________________ are solids that can dissolve in a liquid.
Soluble
_________________ are solids that cannot dissolve in a liquid.
Insoluble
The term ________________ is used to describe what happens to the soluble solids that melt in the mixture.
Dissolve
_________________ is the liquid that is used to dissolve a solute in a solution.
Solvent
_________________ is the solid that dissolves in the solvent in a solution.
Solute
Which of the following best describes the process of evaporation?
The particles gain energy and move away from each other.
The particles gain energy and move closer to each other.
The particles lose energy and move closer to each other.
The particles lose energy and move away from each other.
Which of the following best describes the process of condensation?
The particles gain energy and move away from each other.
The particles gain energy and move closer to each other.
The particles lose energy and move closer to each other.
The particles lose energy and move away from each other.
Which variable is kept the same throughout the investigation?
control variable
independent variable
dependent variable
Which variable is the one condition that is changed during a scientific experiment?
control variable
independent variable
dependent variable
Which variable is the one condition that is observed or measured during a scientific experiment?
control variable
independent variable
dependent variable
This describes how high or low a sound is.
Pitch
This describes how loud or quiet a sound is.
Volume
How can you make a recorder produce low notes?
You must cover more holes on the recorder.
How can you make a recorder produce high notes?
You must cover less holes in the recorder.
Why is a tightened string of a guitar producing a high note?
Because when the string is tightened, the sound VIBRATIONS MOVE FASTER making a high sound.
