Density (practice for test)
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What is density?
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a relationship between mass and volume.
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If we have apple juice with a density of 1.04g/mL, will chocolate (1.2g/mL)sink or float?
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Chocolate will Sink in Apple Juice
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What is the equation for density?
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Density = mass / volume
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Apples are more dense than oranges,water is less dense than oranges,hot sauce is the least dense. Put them in order from most to lease dense.
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Apple, Orange, water, hot-sauce
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Which one is the least dense? a cork or a paperclip?
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A cork is less dense than a paperclip
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What is the water displacement of the object we see here?
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The rock has a volume of 10 mL or 10 cm3
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The __________ of the blue guy is 1.6 mL
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Volume
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What is the density of an object that floats in the middle of an aquarium?
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1.0 g/mL
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What does a triple beam measure?
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mass
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What does a cylinder measure?
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liquid volume
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What does LxWxH measure?
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volume of a cube
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What does a meter-stick measure?
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Length
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What is the density of water?
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1.0 g/mL
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A box has a length of 5 cm, width of 10 cm, and a height of 2 cm. If the box has a mass of 300g, what is the density of the box? Will the box float in water?
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3 g/cm3 The box will NOT float in water
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Is hot air or cold air more dense?
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cold air is more dense than warm air.
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If the following liquids were placed in a cylinder, what order would the layers appear? Corn syrup 1.38; ether 1.2; canola oil .93; salt water 1.1
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Canola oil (top), Salt water, Ether, Corn syrup (bottom)
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Weight is measured in ______ in the metric system.
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Newtons (N)
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What does weight measure?
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the force of gravity
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buoyancy
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The upward force of water,another liquid, or air that keeps things afloat.
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Is density a physical or chemical property ?
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physical property
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Common units for liquid volume
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mL or L
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Common units for solid volume
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cm3 or m3
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Common units for mass
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g or kg
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how to find the volume of a cube
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LxWxH
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how to find the volume of an irregular solid water
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displacement : H2O final vol - H20 initial vol
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tool used to find mass
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triple beam balance
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How can a steel ship float when steel has a higher density than water?
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the ship's hull is shaped so that the ship has a larger volume and therefore a smaller density
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objects that float in water have a density
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less than 1 g/mL
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objects that sink in water have a density
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greater than 1 g/mL
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when an object's weight is greater than the buoyant force
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the object will sink
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Why is density considered a useful property for identifying matter?
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Density is unique to each substance.
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What property of matter is demonstrated by the fact that you cannot fit any more books onto a bookshelf because it is already filled?
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Volume
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How could you change the mass of an object?
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remove or add matter
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How could you change the weight of an object?
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move to the moon. or the mountains; further from gravity.
