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Questions and Answers
What is density?
What is density?
Density is a physical feature of a substance and is the measure of how much mass is contained in a given volume of that substance.
What is the formula for density?
What is the formula for density?
Density = mass/volume or d = m/v.
How is density expressed?
How is density expressed?
Density is expressed as a ratio of two different units, made up of mass and volume.
What are two commonly used units for density?
What are two commonly used units for density?
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When does an object float?
When does an object float?
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What is the most dense phase of matter?
What is the most dense phase of matter?
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What happens to the density of an object when heated?
What happens to the density of an object when heated?
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What is the density of air?
What is the density of air?
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What is the density of water?
What is the density of water?
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What is the density of ice?
What is the density of ice?
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What is the density of ocean water?
What is the density of ocean water?
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What is the density of silver?
What is the density of silver?
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What is the density of gold?
What is the density of gold?
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Study Notes
Density Overview
- Density is a physical property of a substance, consistent across all samples.
- It quantifies the amount of mass per unit volume in a substance.
Density Formula
- Density is calculated using the formula: Density = Mass / Volume (d = m/v).
- This establishes a direct relationship between mass and volume.
Units of Density
- Density is represented as a ratio of mass to volume, utilizing different units.
- Commonly used units for density include grams per cubic centimeter (g/cm³) and grams per milliliter (g/mL).
Floating and Density
- An object will float in a liquid if its density is less than that of the surrounding liquid.
Phases of Matter
- The densest phase of matter is solid, as it contains more mass within the same volume compared to other phases.
Effects of Heating on Density
- When an object is heated, its volume tends to increase, resulting in a decrease in density.
Densities of Common Substances
- Air: 0.0013 g/cm³
- Water: 1.0 g/cm³
- Ice: 0.93 g/cm³
- Ocean Water: 1.03 g/cm³
- Silver: 10.5 g/cm³
- Gold: 19.3 g/cm³
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Description
This quiz covers the fundamental concepts of density, including its formula, units, and the relationship between density and buoyancy. Understand how density varies across different phases of matter and the effects of temperature on density. Test your knowledge of common substances and their densities.
