density
Density describes how much mass is packed into a given volume. This topic is part of Physics within Science & Nature. This page currently draws on 43 supporting questions, with answers and bonus facts available below.
density trivia questions
Density is mass divided by what?
Answer: Volume
Bonus fact: Density describes how much mass is packed into a given volume.
What is the common SI unit of density?
Answer: Kilograms per cubic meter
Bonus fact: Density has units of mass per volume.
An object less dense than water will generally do what?
Answer: Float
Bonus fact: Buoyancy can support an object whose average density is below water's.
Bone density refers to how much mineral is packed into what?
Answer: Bone
Bonus fact: Higher mineral density generally means stronger bone.
Which imaging test is commonly used to measure bone mineral density?
Answer: DEXA scan
Bonus fact: Dual-energy X-ray absorptiometry is widely used.
Low bone density that greatly increases fracture risk is called what?
Answer: Osteoporosis
Bonus fact: Osteoporosis makes bones more fragile.
A standard high-density 3.5-inch floppy disk commonly held about how much data?
Answer: 1.44 MB
Bonus fact: Its capacity seems tiny by modern standards.
Population density measures the number of people per what?
Answer: Unit area
Bonus fact: It is commonly reported as people per square kilometer or mile.
Which has higher population density: a crowded city or a sparsely settled rural region?
Answer: Crowded city
Bonus fact: Density measures concentration, not total population alone.
Why can two countries with similar populations have very different population densities?
Answer: Their land areas differ
Bonus fact: Population divided by area determines density.
What term describes low-density outward expansion of urban development?
Answer: Urban sprawl
Bonus fact: Sprawl can increase driving distances and land consumption.
Which metal has the lowest density of all metals?
Answer: Lithium
Bonus fact: Lithium has a density of about 0.534 grams per cubic centimeter and reacts vigorously with water.