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Density

Quiz by Debra Mulubwa

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18 questions
Show answers
  • Q1
    Why do objects float or sink in a fluid?
    Due to differences in density between the object and the fluid.
    Due to differences in size between the object and the fluid.
    Due to changes in temperature of the fluid.
    Due to their shape.
    30s
  • Q2
    What is the main factor that determines whether an object will float or sink in a fluid?
    The fluid's temperature.
    The object's density compared to the fluid's density.
    The object's size.
    The object's shape.
    30s
  • Q3
    Which of the following statements about objects floating in liquids is true?
    Objects float when their mass is greater than the mass of the liquid they are in.
    Objects float when their density is less than the density of the liquid they are in.
    Objects float when their density is greater than the density of the liquid they are in.
    Objects float when their volume is greater than the volume of the liquid they are in.
    30s
  • Q4
    Which of the following substances has the highest density?
    Water
    Lead
    Wood
    Air
    30s
  • Q5
    Why does an object with lower density than a fluid float?
    The buoyant force exerted by the fluid is greater than the weight of the object.
    The object is less affected by gravity.
    The fluid pushes the object upward.
    The object repels the fluid.
    30s
  • Q6
    Why do ships made of steel float in water?
    Ships float because the water pushes them upward.
    Ships float because they are lighter than water.
    Ships float because they displace a volume of water with a weight equal to or greater than their own weight.
    Ships float because they are made of steel.
    30s
  • Q7
    Why do balloons filled with helium rise in the air?
    The string attached to the balloon pulls it upward.
    Helium is lighter than air, making the balloon rise.
    The balloon is filled with hot air, causing it to rise.
    Helium has a lower density than the surrounding air
    30s
  • Q8
    Which of the following objects will float in water?
    A rock
    A glass marble
    A metal coin
    A wooden block
    30s
  • Q9
    Why do hot air balloons rise in the sky?
    Hot air inside the balloon is less dense than the surrounding air
    The weight of the balloon pulls it upward.
    Hot air expands, causing the balloon to rise.
    Hot air carries the balloon upward with its force.
    30s
  • Q10
    Why do ice cubes float in water?
    Ice has a lower density than liquid water.
    Ice has a higher density than liquid water.
    The shape of ice cubes allows them to float.
    Ice is lighter than water.
    30s
  • Q11
    What is the SI unit for density?
    kilograms per cubic meter (kg/m³)
    newtons per square meter (N/m²)
    meters per second (m/s)
    grams per cubic centimeter (g/cm³)
    30s
  • Q12
    Which of the following is an example of a substance with a high density?
    solid lead
    gaseous oxygen
    liquid water
    plasma
    30s
  • Q13
    What is the formula for calculating density?
    volume/mass
    mass/volume
    mass * volume
    mass + volume
    30s
  • Q14
    Which property of matter is used to calculate density?
    mass and volume
    temperature and pressure
    length and width
    density and weight
    30s
  • Q15
    A solid object has a mass of 500 grams and a volume of 250 cubic centimeters. What is the density of the object?
    0.2 g/cm³
    2.5 g/cm³
    2 g/cm³
    0.5 g/cm³
    30s

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