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Physical Science Final Test

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5 Written Questions

5 Matching Questions

  1. Solvent
  2. Radioactive isotopes
  3. Radioactive decay
  4. Radiation
  5. Colloid
  1. a some nuclei are more stable than others. Those that are unstable break apart in nuclear reactions,
  2. b waves of energy and particles that travel from one place to another.
  3. c A liquid that dissolves some kind of solid
  4. d the process of an unstable nucleus breaking down by releasing alpha, beta or gamma radiation; as the unstable nucleus decays it becomes more stable.
  5. e a substance microscopically dispersed evenly throughout another substance

5 Multiple Choice Questions

  1. • The particles of matter in the air made radioactive from a nuclear explosion. Some of these particles fall in the immediate area and some get blown by upper winds many thousands of miles. Eventually they fall to the earth
  2. the release of Radiation
  3. used to describe substances that look the same throughout. Homogeneous substances have one phase and uniform composition
  4. A negatively charged particle that moves around the nucleus
  5. kills the plants and many of the animals living there. When the plants die, their roots break up and no longer hold the land together. The land erodes away as it is washed by runoff and waves.

5 True/False Questions

  1. WetlandA compound made up of the positive ion from the base and the negative ion from the acid

          

  2. Hypothesisused to describe substances that look the same throughout. Homogeneous substances have one phase and uniform composition

          

  3. J.R. Oppenheimera U.S. nuclear physicist

          

  4. Food Chainis a visibly distinct portion of matter

          

  5. HeterogeneousA scientific procedure undertaken to make a discovery, test a hypothesis, or demonstrate a known fact

          

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