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Definition 1
Definition 2
Lesson 1
Lesson 2
True/False
100
  • a change of matter in size, shape, or state that does not change the type of matter
  • physical change
100
  • the temperature at which a substance changes state from a liquid into a gas
  • boiling point
100
  • Changes in (                ) occur when an object gains or loses heat.
  • temperature
100

 

  • A mixture contains at least (         ) substances.
  • two
100
  • Making mixtures requires a physical change. Separating mixtures requires a chemical change. (T or F)
  • False; Separating mixtures requires a physical change.
200
  • a physical combination of two or more substances that are blended together without forming new substances
  • mixture
200
  • the maximum amount of a substance that can be dissolved by another substance
  • solubility
200
  • What is the melting point of water in degrees Celsius and degrees Fahrenheit?
  • 0°C, 32°F
200
  • Many substances become more soluble at (                 ) temperatures.
  • higher
200
  • The melting point and the boiling point of a substance depend on its mass. (T or F)
  • False; Neither the melting point nor the boiling point of any substance depends on mass.
300
  • a substance that is dissolved by another substance to form a solution
  • solute
300
  • a substance that dissolves one or more other substances to form a solution
  • solvent
300
  • What happens to the particles of a substance as heat is added?
  • Heat energy causes the particles to move faster and farther apart.
300
  • An orange juice that says “shake well before using” is a (                 ).
  • suspension
300
  • Oxygen gases become more soluble in warmer water. (T or F)

False; Oxygen gases become less soluble in warmer water.

400
  • a type of mixture in which the particles of one material are scattered through another and block the passage of light without settling out
  • colloid
400
  • the process of changing directly from a solid into a gas without first becoming a liquid
  • sublimation
400
  • A material with high melting and boiling points has particles that are (               ) attracted to one another.
  • A material with low melting and boiling points has particles that are (               ) attracted to one another.
  • strongly
  • weakly
400
  • Adding more sugar makes the solution more (                 ) and also sweeter.
  • concentrated
400
  • Usually gases form solutions easier than liquids. (T or F)
  • True
500
  • a solution of a metal and at least one other solid which is often also a metal
  • alloy
500
  • the process of separating the parts of a mixture by evaporation and condensation
  • distillation
500
  • What makes any material change from one state to another?
  • a change in heat energy
500
  • In sugar water, the (                 ) is the solute and the (                 ) is the solvent.
  • sugar; water
500
  • Paint is a suspension. (T or F)
  • False; Paint is a colloid.