Understanding Mass, Weight, and Density

What is the primary reason we do not float off into space?

• The rotation of the Earth

• Gravity pulling us towards the Earth's center

• The atmosphere's pressure

• The Earth's magnetic field

How is weight different from mass?

• Weight is measured in kilograms, while mass is measured in Newtons.

• Weight is a measure of volume, while mass is a measure of density.

• Weight is a force measured in Newtons, while mass is measured in kilograms.

• Weight is constant everywhere, while mass changes with location.

What is the value of gravity used at the GCSE level on Earth?

• 8 Newtons per kilogram

• 12 Newtons per kilogram

• 10 Newtons per kilogram

• 9.8 Newtons per kilogram

In the context of freefall, how is gravity sometimes described?

• As a constant speed

• As a form of energy

• As a type of mass

• As an acceleration

What happens to an astronaut's weight when they are in space?

• It increases due to lack of gravity

• It remains the same as on Earth

• It becomes zero due to lack of gravitational force

• It doubles due to the vacuum of space

What is density a measure of?

• The amount of space an object occupies

• The weight of an object in a vacuum

• The mass of an object per unit volume

• The gravitational force on an object

Why is a metal object heavier than a plastic object of the same size?

• Metal has more air pockets than plastic

• Metal is less dense than plastic

• Metal atoms are heavier and more closely packed than plastic atoms

• Metal atoms are lighter than plastic atoms

What is the formula for calculating density?

• Density = Volume / Mass

• Density = Mass / Volume

• Density = Weight / Volume

• Density = Mass * Volume

How can the volume of an irregularly shaped object be determined?

• By measuring its height, width, and depth

• By calculating its weight and dividing by its density

• By using a ruler to measure its dimensions

• By using water displacement in a measuring cylinder

What is the unit conversion required for volume when calculating density?

• From liters to milliliters

• From meters cubed to centimeters cubed

• From grams to kilograms

• From centimeters cubed to meters cubed