Mid Summative 3 Answers

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Mid Summative 3 Answers

  1. 1. Gas is a phase of matter because... <ul><li>Has mass </li></ul><ul><li>Takes up space </li></ul>
  2. 2. Gas is different from a solid or liquid because . . . <ul><li>Has no definite shape </li></ul><ul><li>Particles are spaced farther apart </li></ul><ul><li>Can’t usually see or smell a gas </li></ul>
  3. 3. Particle vs. Substance <ul><li>A particle is the smallest piece of a substance that is still that substance </li></ul><ul><li>Substance is a unique form of matter different from all others </li></ul>
  4. 4. All substances should be circled <ul><li>Because each is a unique form of matter different from the others </li></ul>
  5. 5. The plunger went up because <ul><li>A gas formed and there was no place for the gas to go but up </li></ul><ul><li>New substance, the gas, was evidence of a chemical reaction </li></ul>
  6. 6. If the plunger was pulled up <ul><li>The volume of air would EXPAND because the particles would have more room to move about freely </li></ul>
  7. 7. In a helium filled balloon . . . <ul><li>There is empty space/nothing between the helium particles </li></ul><ul><li>If the balloon were compressed, the particles would become closer together because the volume of air was compressed </li></ul>
  8. 8. Particles are placed in the syringe because . . . <ul><li>20 particles in syringe B and C </li></ul><ul><li>Placed the same as in syringe B because the amount of space did not change – just the end of the syringe was clamped preventing particles from getting in or out </li></ul>

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