CRCT Review 4 (8th grade Science)

Name: ______Date: ______Period: ______

  1. Kenyatta pours some water into a graduated cylinder and records the amount. He then drops a marble into the graduated cylinder. This causes the water level to increase and he records the new measure. The difference between Kenyatta’s first and second measures equals ______.
  2. The area of the marble.
  3. The mass of the marble.
  4. The volume of the marble.
  5. The density of the marble.
  1. An object accelerates at 3 m/s2 when a 10 Newton force is applied to it. Which force would cause this object to accelerate at 6 m/s2? (Hint: = )
  2. 5N
  3. 10N
  4. 20N
  5. 30N
  6. A piece of pine wood floats on the surface of a lake because the water exerts…
  7. An upward force equal to the weight of the wood.
  8. A downward force equal to the weight of the wood.
  9. An upward force equal to the weight of the displacement water.
  10. A downward force equal to the weight of the displacement water.
  11. The graph below shows the heating curve for substance X. At approximately which temperature does a phase change begin?
  1. A student is investigating how light behaves when it strikes different surfaces. She has a frosted window glass pane, a clear window glass pane, a mirror, and a piece of cardboard. Which of these objects will scatter the most light?
  2. The mirror, because it is reflective.
  3. The piece of cardboard, because it is opaque.
  4. The clear window glass, because it is transparent.
  5. The frosted window glass, because it is translucent.
  1. Ramon’s mother gives him an ice cream cone after dinner. When he goes outside to eat it, the ice cream begins to melt very quickly. Which of the following describes what is happening to his ice cream?
  2. A physical change is taking place.
  3. A chemical change is taking place.
  4. A change in solubility is taking place.
  5. A change in conductivity is taking place.
  1. Which of these simple machines is shown in the picture?
  2. Lever
  3. Screw
  4. Pulley
  5. Wedge
  1. Chad and Gretchen bought a video game system. They brought it home and plugged it in, but it does not work. Chad’s mother thinks she can fix the problem. What should she do FIRST to make sure she does NOT get shocked?
  2. Test the circuits in the system.
  3. Unplug the system from the wall.
  4. Disconnect the ground wire.
  5. Make sure the system is plugged into a socket.
  1. What unit of measure should Jerry use to report the volume of a liquid?
  2. Degrees Celsius
  3. Kilograms
  4. Milliliters
  5. Centimeters
  1. The depth of Lake Superior can be measured by sending sound waves to the bottom and measuring the period of time it takes for the reflected sound waves to return to the surface. Which of the following would indicate a shallow part of the lake?
  2. There is no return signal.
  3. The return signal is very weak.
  4. The return signal appears almost immediately.
  5. The return signal comes back at a different speed.