Density: Question Preview (ID: 10690)

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What is density?
a) a ratio of mass to volume
b) the comparison of how much matter in an object to how much space it takes up
c) how tightly packed the molecules are in an object
d) all of the above

Which of the following is a unit for density?
a) mL
b) g/mL
c) g
d) cm^3

An object is most likely to sink in water if ___________________________.
a) it has a large mass
b) it has a large volume
c) it has a low density
d) it has a high density

Liquid water is more dense than ice because _______________________.
a) liquid water molecules have more mass than ice molecules
b) when ice melts there is an increase in the amount of molecules
c) the volume of the liquid increases when it freezes
d) a chemical change occurs as ice melts that causes the mass of the water to increase

Two liquids, A and B, have densities 0.75 g/mL and 1.14 g/mL respectively. When both liquids are poured into a container, which liquid floats on top?
a) A
b) B
c) neither; they mix evenly
d) both; they keep trading places like a lava lamp

A substance is cut into several pieces. As compared to the density of the original sample, the density of each piece will be ________________.
a) greater
b) less
c) the same
d) none of the above

If a sphere is heated which of the following is most likely to occur?
a) the volume of the sphere will increase but its density will decrease
b) the volume of the sphere will decrease but its density will increase
c) both the volume and the density will increase
d) both the volume and the density will decrease

Which characteristic of an object will always change as the object travels from the Earth to the Moon?
a) volume
b) weight
c) density
d) mass

An object has a mass of 10 grams and a volume of 2 mL. What is the density of the object?
a) 20 g/mL
b) 0.2 g/mL
c) 5 g/mL
d) 12 g/mL

Oil floats on water. The most accurate reason for this is ______________________.
a) water is heavier than oil
b) oil is less dense than water
c) oil is immiscible (does not dissolve) in water
d) oil is both less dense and immiscible with water

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