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Physical Science Review (Grade 8)

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Physical Science Review

1. 
Which statement correctly compares the potential energy of the balls?
Potential Energy
  1. C has more potential energy than B
  2. E has more potential energy than F
  3. D has less potential energy than E
  4. B has less potential energy than A
2. 
The gravitational force between 1 kg of lead and Earth is                   the gravitational force between 1 kg of marshmallows and Earth.
  1. greater than
  2. less than
  3. the same as
  4. none of the above
3. 
Which of the following is an example of kinetic energy?
  1. a child jumping rope
  2. a swimmer ready to dive
  3. a stuffed toy lying on a table
  4. firewood stacked in a fireplace
4. 
If the bar magnet below is carefully cut in half into two smaller magnets, they will each have
Bar Magnets S N
  1. only north poles
  2. only south poles
  3. north and south poles
  4. no north or south poles
5. 
The diagram below shows the magnetic field lines for a bar magnet. Which statement below best describes the strength of the magnetic field for the bar magnet?
Magnetic Lines Of Forces
  1. the magnetic field is strongest at north pole of the magnet
  2. the magnetic field is strongest at the south pole of the magnet
  3. the magnetic field is strongest at both the north and south poles
  4. the magnetic field is strongest in the region between the north and south poles
6. 
Which of the following best describes the circuit below?
Series Circuit
  1. open circuit in series
  2. closed circuit in series
  3. open circuit in parallel
  4. closed circuit in parallel
7. 
Which best describes the motion of the object recorded in data table below?
Data Table - Negative Acceleration
  1. It does not move.
  2. It maintains a constant speed.
  3. It undergoes positive acceleration.
  4. It undergoes negative acceleration.
8. 
Below is a velocity-time graph of a moving object. Which statement best describes the object's velocity between points D and E?
Velocity Vs. Time
  1. the object's velocity is increasing
  2. the object's velocity is decreasing
  3. the object's velocity is constant
  4. the object is stopped
9. 
You can see your image in a shiny, flat surface because light waves bounce directly back at you and your eyes. This is an example of
  1. diffraction.
  2. reflection.
  3. refraction.
  4. transparency.
10. 
Which set of waves types are listed from longest to shortest wavelength?
Electromagnetic Spectrum
  1. x-ray, visible, infrared
  2. microwave, visible, x-ray
  3. visible, infrared, microwave
  4. infrared, microwave, visible
11. 
Which statement correctly compares Wave A and Wave B?
Comparing Amplitudes
  1. Wave A has a greater amplitude than Wave B
  2. Wave B has a greater amplitude than Wave A
  3. Wave A has a greater wavelength than Wave B
  4. Wave B has a greater wavelength than Wave A
12. 
Which diagram depicts the waves interacting destructively?
  1. Constructive Interference
  2. Destructive Interference
13. 
The measure of the amount of matter in an object is called
  1. volume
  2. energy
  3. mass
  4. size
14. 
The atoms of elements in Group 17 of the periodic table are very reactive. Which of the following best describes the energy transfers that happen with the elements in this group?
  1. The more easily an atom loses an electron, the less energy the atom releases.
  2. The more easily an atom gains an electron, the less energy the atom releases.
  3. The more easily an atom loses an electron, the more energy the atom releases.
  4. The more easily an atom gains an electron, the more energy the atom releases.
15. 
Which letter shows where noble gases are located on the periodic table?
Periodic Table - No Labels
  1. A
  2. E
  3. H
  4. J
16. 
Aluminum is a metal found in the 4th column of the periodic table. What statement
is true about Aluminum and the other elements in that column?
  1. All the elements are nonreactive
  2. All the elements are in the same period.
  3. All the elements have the same number of protons.
  4. All the elements have similar chemical properties.
17. 
Look at the electron-dot diagram for magnesium.
Electron-Dot Diagram - Magnesium
An atom of magnesium would be most likely to bond with an atom of which of the following elements?
  1. Electron-Dot Diagram - Argon
  2. Electron-Dot Diagram - Silicon
  3. Electron-Dot Diagram - Chlorine
  4. Electron-Dot Diagram - Oxygen
18. 
Which of the following best explains why the end of a spoon sticking out of a cup of hot water also gets hot?
  1. The hot water causes a chemical reaction to take place in the spoon.
  2. The heat from the hot water is conducted to the spoon handle.
  3. The hot water heats the air surrounding the upper part of the spoon.
  4. The hot water causes a physical change in the spoon handle.
19. 
On a cold, winter day, Sheena rubs her hands together. Stored chemical energy is transformed into mechanical energy. Due to the Law of Conservation of Energy some of the energy is also transformed into
  1. heat energy.
  2. light energy.
  3. solar energy.
  4. kinetic energy.
20. 
The temperature at which the substance is melting is                 the temperature at which the substance is freezing.
Heating Curve With Text Labels
  1. is less than
  2. is more than
  3. the same as
21. 
Which of the following best explains the scenario below?

On a summer morning, John walks barefoot across his paved driveway with no problem. However, later that afternoon he steps barefoot onto the same driveway and must quickly run off because the bottoms of his feet feel like they are burning.
  1. As the temperature increased during the day, the particles in the pavement moved slower and the thermal energy increased.
  2. As the temperature increased during the day, the particles in the pavement moved slower and the thermal energy decreased.
  3. As the temperature increased during the day, the particles in the pavement moved faster and the thermal energy increased.
  4. As the temperature increased during the day, the particles in the pavement moved faster and the thermal energy decreased.
22. 
A pan of water is set on a stove. After the heat is turned on, the temperature of the water begins to                     and the thermal energy of the water                    .
  1. decrease, decreases
  2. decrease, increases
  3. increase, increases
  4. increase, decreases
23. 
What is a good sign that a chemical change has occurred?
  1. the substance seems to have disappeared
  2. the state of the matter has changed
  3. the production of heat, light, and smoke
  4. the physical properties are the same
24. 
Which of the following best describes the particles in matter?
  1. They are larger in solids than in liquids or gases
  2. They are larger in gases than in solids or liquids
  3. They do not move in solids
  4. They are always moving
25. 
In science lab you are given the four substances listed below with their densities:

Honey [math]1.42g//cm^3[/math]
Olive oil [math]0.90g//cm^3[/math]
Water [math]1.00g//cm^3[/math]
Ethyl alcohol [math]0.81g//cm^3[/math]

You are asked to combine all four substances in a beaker and observe how they separate. Which correctly lists the order in which the four liquids separate, starting with the one on top to the one on the bottom of the beaker?
  1. Ethyl alcohol, Olive oil, Water, Honey
  2. Honey, Water, Olive oil, Ethyl alcohol
  3. Water, Ethyl alcohol, Honey, Olive oil
  4. Olive oil, Honey, Ethyl alcohol, Water

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