Plasma exists in extremely high temperatures and environments with electrically charged gases. In which of the following can plasma probably exist?
  • A In a light bulb
  • B In a flame
  • C In a vacuum
  • D Ionosphere, in the auroral displays
A particular sample has the following characteristics: The particles move very quickly, randomly, and have great spaces in between. They move and occupy the space of the container. Which of the following samples fit the description above?
  • A Water
  • B Helium in a balloon.
  • C Ice
  • D Mercury
Which of the following statements is true when comparing the particles of honey and sugar cubes?
  • A The particles of honey are closer together than the particles of sugar cubes.
  • B The particles of sugar cubes are closer together than the particles of honey.
  • C They are the same.
Which of the following are examples of chemical properties of matter? I. Flammability II. Combustibility III. Density IV. Reactivity
  • A I, II, III
  • B I, II and IV
  • C II, III and IV
A cup holds 240 grams of liquid water and 80 grams of ice. What is a reasonable mass for the water in the cup after the ice melts?
  • A 240 grams
  • B 240 grams plus 80 grams
  • C 320 grams
Which of the following properties of copper metal is not affected by the amount of matter present?
  • A Mass
  • B Volume
  • C The ductility of the copper metal.
In which of the following processes are the particles moving closer together?
  • A Condensation of air
  • B Evaporation
  • C Melting
Pure iron (Fe) melts at 1535 °C. Which of the following statements below is true?
  • A Iron will start to melt at 1535 °C
  • B Iron will start to boil at 1535 °C
  • C Iron will start to liquefy at 1535 °C
A 40 cm magnesium ribbon sample is needed for a laboratory activity. You were advised to divide the ribbon into four samples. Which of the following properties of the magnesium ribbon will stay the same after dividing it?
  • A Mass
  • B Volume
  • C Density
Which of the following will undergo a chemical change? I. Melting of candle wax II. Burning of paper III. Shaping silver into wires IV. Rusting of metal fences V. Cooking eggs
  • A I, II
  • B II, IV and V
  • C I, II, III
Which of the following cooking procedures produces physical change?
  • A Chopping carrots
  • B Boiling water
  • C Baking bread
At what temperature does melting occur?
  • A at 20 °C
  • B at 30 °C
  • C at 40 °C
How can the graph be used to determine the melting and boiling points of the substance?
  • A By identifying the temperature range where the substance transitions between phases.
  • B By indicating the temperatures from the plateaus on the graph.
Missy observed that a piece of paper is cut into smaller pieces and then burned. They are asked to categorize the changes that occurred. Which of the following best describes the changes she observed?
  • A Cutting the paper is a physical change; burning the paper is a chemical change.
  • B Both are physical changes.
  • C Both are chemical changes.
A pure camphor tablet, when left out in the open completely disappears while leaving a minty scent into the air. What process do camphor tablets undergo when this happens?
  • A Melting
  • B Sublimation
  • C Evaporation
Which of the following statements below are true based on the diagram? I. Iron is solid at room temperature. II. Iron will begin to turn into gas at 2000 °C III. Iron is liquid from point C to point D IV. Iron will start to liquefy at 1500 °C V. Iron is fully liquid at 1500 °C
  • A I, II, III
  • B II, IV and V
  • C I, III and IV
Which of the following requires the removal of heat energy? I. Condensation II. Evaporation III. Melting IV. Freezing
  • A I and II
  • B I and IV
  • C II and III
A pot of water on a hot stove begins to boil rapidly. A glass lid is placed on the pot and water droplets begin forming on the inside of the lid. What happened?
  • A Water evaporates.
  • B Steam cools and water molecules move closer together.
  • C Water boils.
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