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SC.912.P.8.2 Pre-test
供稿人: Rodriguez
  • 1. What characteristic best describes what happen during a physical change?
A) Form stays the same
B) Composition changes
C) Composition stays the same
D) Mass is lost
  • 2. Which of the following does NOT indicate that a chemical change has occurred?
A) formation of a precipitate
B) melting of a solid
C) color change
D) formation of a gas
  • 3. If the chemical properties of a substance remain unchanged and the appearance or shape of an substance changes what is it called?
A) Neither a physical or chemical change
B) Both a physical and chemical change
C) Physical change
D) Chemical change
  • 4. Which of the following situations represents a chemical change?
A) A strip of magnesium ribbon is broken into many small pieces.
B) A blue solution is mixed with a yellow solution and a brown solid is formed.
C) A blue solution is mixed with a yellow solution and a green solution results.
D) Ice is placed in a beaker and heated until it melts.
  • 5. Which of the following is NOT a physical process?
A) melting ice
B) sharpening a pencil
C) an explosion of dynamite
D) melting ice
  • 6. Alexis is comparing the substances and hot water inside a ceramic cup, and the water vapor above the cup. What can she say about the motion of the particles in all of the substances?
A) They are always moving.
B) They do not move.
C) They move very fast in all directions.
D) They move past each other slowly.
  • 7. To observe a chemical property, you must attempt to change its identity. Which of these statements describes an example of a chemical property?
A) A metal turns to liquid at a certain temperature.
B) A painter coats a building with red paint.
C) A freshly waxed floor has a bright shine.
D) A silver statue begins to tarnish.
  • 8. What type of change occurs when one or more substances are converted into new substances?
A) Nuclear reaction
B) Physical change
C) Chemical fusion
D) Chemical change
  • 9. Luis often leaves his bicycle outside, even when it rains. Luis' bicycle has now begun to rust. How quickly a substance rusts is an example of which of the following?
A) a physical property
B) a physical change
C) a state of matter
D) a chemical property
  • 10. Which change can be easily be reversed?
A) Neither a physical or chemical change
B) Chemical Change
C) Both a physical and chemical change
D) Physical Change
  • 11. Chemical changes result in new substances, but physical changes do not. Which process is an example of a physical change?
A) scrap iron rusting over time
B) lettuce rotting in the refrigerator
C) metal melting in very high heat
D) charcoal burning in a grill
  • 12. Matter is everything around you. All matter has mass and volume. Which of these choices is an example of matter?
A) light
B) sound
C) air
D) magnetism
  • 13. There are several differences between chemical and physical changes. Which process is a sign of a chemical change?
A) A plaster statue breaks when it falls onto the floor.
B) A cloud quickly changes shape when blown by wind.
C) A melting block of ice leaves a large puddle.
D) A rotting potato gives off a bad smell.
  • 14. Which of the following is an example of physical change?
A) A glass cup falls from the counter and shatters on the ground.
B) Mixing baking soda and vinegar together, and this causes bubbles and foam.
C) Lighting a piece of paper on fire and the paper burns up and leaves ashes.
D) Baking a birthday cake for your mother.
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