Density, SI Units, and Proportionality Quiz

What is the SI unit of density?

• Kilograms per cubic meter (kg/m³)
• Grams per liter (g/L)
• Pounds per cubic foot (lb/ft³)
• Milliliters per gram (mL/g)

If the mass of an object increases while its volume remains constant, what happens to its density?

• Density increases
• Density decreases
• Density remains the same
• Density becomes zero

Which of the following statements best describes direct proportionality?

• As one variable increases, the other variable decreases.
• As one variable increases, the other variable also increases.
• The two variables are unrelated.
• One variable is a constant multiple of the other.

If the volume of a gas is doubled while the temperature remains constant, what happens to its pressure according to Boyle's Law?

• Pressure doubles
• Pressure halves
• Pressure remains the same
• Pressure quadruples

What is the formula for calculating density?

• Density = Mass × Volume
• Density = Mass / Volume
• Density = Volume / Mass
• Density = Mass + Volume

Which of the following is an example of inverse proportionality?

• Speed and time taken for a fixed distance
• Temperature and volume of a gas
• Mass and density of an object
• Length and width of a rectangle

If an object has a density of 5 g/cm³ and a volume of 2 cm³, what is its mass?

• 10 g
• 7 g
• 5 g
• 2 g

Which of the following correctly describes the relationship between pressure and volume in a gas at constant temperature?

• Directly proportional
• Inversely proportional
• No relationship
• Exponentially proportional

What happens to the density of a substance if it is heated and expands, assuming mass remains constant?

• Density increases
• Density decreases
• Density remains the same
• Density becomes negative

Which of the following is NOT an SI unit?

• Meter (m)
• Kilogram (kg)
• Liter (L)
• Foot (ft)