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NC Final Exam Released 2018-2019 (Science)

Quiz by John

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35 questions
Show answers
  • Q1
    How does sonar detect an object in water?
    by sending sound waves to detect the composition of the object
    by sending sound waves that measure the object's temperature
    by sending sound waves that are absorbed by the object
    by sending sound waves that reflect off the object
    30s
  • Q2
    Which causes an object to appear green?
    While scattering all the other colors in the visible spectrum, it reflects green.
    While absorbing all the other colors in the visible spectrum, it reflects green
    While reflecting all the other colors in the visible spectrum, it scatters green.
    While reflecting all the other colors in the visible spectrum, it absorbs green.
    30s
  • Q3
    How do foam earplugs affect the sound a person hears?
    The foam reduces the rate of sound vibrations.
    The foam increases the rate of sound vibrations.
    The foam increases the amount of energy in the sound vibrations.
    The foam reduces the amount of energy in the sound vibrations.
    30s
  • Q4
    Some earthquakes cause the ground to shake more than others. What factor in an earthquake's wave causes a greater shaking of the ground?
    less energy
    lower frequency
    larger amplitude
    slower speed
    30s
  • Q5
    Which statement best describes white light after it passes through a prism?
    The white light contains ultraviolet energy.
    The white light is a combination of all wavelengths of the visible spectrum.
    The white light has no electromagnetic energy.
    The white light is a combination of the wavelengths of red and blue.
    30s
  • Q6
    Why are humans unable to hear ultrasound waves?
    Ultrasound waves have a higher frequency than humans can hear.
    Ultrasound waves do not have energy when traveling.
    Ultrasound waves do not cause matter to vibrate.
    Ultrasound waves have a larger amplitude than humans can hear.
    30s
  • Q7
    Sam found two pieces of pure silver on two different continents and melted them. Why did the two pieces of pure silver have the same melting point?
    The melting point of all natural minerals is the same.
    The melting point of all metals is the same.
    Silver is composed of the same types of atoms.
    Silver is a metal with high conductivity.
    30s
  • Q8
    What happens to steam during condensation?
    It loses energy and changes to a liquid.
    It gains energy and changes to a gas.
    It loses energy and changes to a gas.
    It gains energy and changes to a liquid.
    30s
  • Q9
    What is the best way to determine if a sample is pure gold?
    compare the color of the sample with a sample of pure gold
    compare the luster of the sample with a sample of pure gold
    compare the volume of the sample with a sample of pure gold
    compare the melting point of the sample with a sample of pure gold
    30s
  • Q10
    Two pieces of copper wire are rolled into a coil to make a bracelet. Which statement describes the copper wire?
    Both copper wires are made of different types of atoms.
    Both copper wires are made of the same types of atoms.
    Both copper wires are the same because they were able to bend.
    Both copper wires are different because they came from different sources.
    30s
  • Q11
    What change occurs when a liquid evaporates?
    The particles absorb heat and spread farther apart.
    The particles absorb heat and get closer together.
    The particles release heat and get closer together.
    The particles release heat and spread farther apart.
    30s
  • Q12
    Two identical beakers containing water, which have not yet been placed in the sun, have different volumes of water. Beaker "Y" has more water than beaker "X". If both beakers are placed outside, in the sun, for the same amount of time, what effect will the sun have on the water in each beaker?
    The water in beaker "X" will heat faster because the density of the water is lower.
    The water in beaker "Y" will heat faster because the density of the water is greater.
    The water in beaker "X" will heat faster because the volume of the water is lower.
    The water in beaker "Y" will heat faster because the volume of the water is greater.
    30s
  • Q13
    What will initially happen when a metal rod with a temperature of 60 degrees Celsius is placed into a 5 degree Celsius water bath?
    Heat will travel out of the metal rod and into the water.
    The temperature of the metal rod and the water will both decrease.
    Heat will travel out of the water and into the metal rod.
    The temperature of the metal rod and the water will both increase.
    30s
  • Q14
    How does a 5-g sample of pure gold compare to a 50-g sample of pure gold?
    They have the same melting point but different masses.
    They have the same volume but different melting points.
    They have the same mass but different boiling points.
    They have the same volume but different boiling points.
    30s
  • Q15
    Lin notices that the temperature of the room increases when the afternoon sun shines through the window. She experiments by covering the window using four different materials to find out which works best to reduce the temperature of the room. Which material works best?
    black paper, because if reflects light
    white paper, because it absorbs light
    newspaper, because it absorbs light
    aluminum foil, because it reflects light
    30s

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