Understanding Density Concepts

How is density defined?

• The amount of 3D space an object occupies.

• The amount of particles an object contains.

• Mass per unit volume.

• The weight of an object.

If two objects occupy the same volume, which object is more dense?

• The object with fewer particles spread further apart.

• The object with more particles packed closer together.

• The object that weighs less.

• The object that is softer.

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Why does a helium balloon float in the air?

• Helium is heavier than air.

• Helium is more dense than air.

• Helium is less dense than air.

• The balloon's material is very light.

What is the correct formula for calculating density and its common units when mass is measured in grams?

• Density = Volume / Mass; units: mL/g or cm³/g

• Density = Mass x Volume; units: g·mL or g·cm³

• Density = Mass / Volume; units: g/mL or g/cm³

• Density = Particles / Volume; units: particles/mL or particles/cm³