6th Grade Review

Which property of a substance indicates whether the substance is a liquid or a solid at room temperature?

• Melting point
• Electrical conductivity
• Flexibility
• Solubility

Which statement is an inference?

• A thermometer shows that the air temp is 56°F.
• A mineral sample of galena produces a gray-black streak when tested
• Based on previous data, ten hurricanes occur in the year 2013
• A weather vane indicates the wind is coming from the west

Which two atoms are water molecules made of?

• Helium & Oxygen
• Oxygen & Carbon
• Hydrogen & Oxygen
• Hydrogen & Sulfur

Which activity is an example of a chemical change?

• Dissolving table salt in water
• Hammering aluminum into thin sheets
• Melting gold to make jewelry
• Burning wood to produce ashes

A student examined a rock sample and described it as having particles of various colors that were 1 millimeter to 12 millimeters in size. The student was making

• An inference
• A prediction
• A hypothesis
• An observation

A student is trying to dissolve 20 grams of sugar in a beaker containing 250 milliliters of water at room temperature. What can the student do to make the sugar dissolve faster in the water?

• Decrease the temp of the water
• Use larger pieces of sugar
• Stir rapidly
• Use less water

A student states that the graduated cylinder contains 150 mL of water. This statement is

• A prediction
• A theory
• An observation
• A hypothesis

Which table correctly identifies the phases of matter represented by the diagrams?

• A-Liquid
  B-Gas
  C-Solid
• A-Solid
  B-Liquid
  C-Gas
• A-Solid
  B-Gas
  C-Liquid
• A-Liquid
  B-Solid
  C-Gas

Which process is represented by B?

• Condensing
• Freezing
• Evaporating
• Melting

Which process is represented by B?

• Condensing
• Freezing
• Evaporating
• Melting