# Relative density: Quiz

Question 1: If the reference is not explicitly stated then it is normally assumed to be ________ at 4 °C (or, more precisely, 3.98 °C, which is the temperature at which water reaches its maximum density).
Water resourcesOxygenEarthWater

Question 2: From the ________ buoyancy principle, the buoyancy force acting on the hydrometer is equal to the weight of liquid displaced.
ThalesDemocritusEuclidArchimedes

Question 3: Relative density is often used by geologists and mineralogists to help determine the ________ content of a rock or other sample.
MineralSolidCalciumCarbon

Question 4: ________ has a specific gravity of 11.35, so it is 11.35 times as dense as water.

Question 5: This is called the Apparent Specific Gravity, denoted by subscript A, because it is what we would obtain if we took the ratio of net weighings in air from an analytical balance or used a ________ (the stem displaces air).
Hydraulic conductivityWater contentHydrometerEarthquake

Question 6: Relative density, or specific gravity,[1][2] is the ratio of the ________ (mass of a unit volume) of a substance to the density of a given reference material.
CopperGoldIronDensity

Question 7: The weight of the displaced liquid can then be determined, and hence the ________ of the powder.
AluminiumRelative densitySurface tensionDensity

Question 8: ________ has a specific gravity of 2.7, so it is 2.7 times as dense as water.
CopperAluminiumTitaniumGold

Question 9: If Δx is small then, as a first-order approximation of the ________ equation (4) can be written as:
CalculusGeometric seriesSeries (mathematics)Archimedes

Question 10: This device enables a liquid's density to be measured accurately by reference to an appropriate working fluid, such as water or mercury, using an ________.
WeightWeighing scaleForceMass