Density

Front

What is density?

Back

Density is defined as mass per unit volume, typically expressed in grams per cubic centimeter (g/cm³).

Front

How does temperature affect the density of air?

Back

Cold air is denser than warm air because the molecules in cold air are closer together.

Front

What is the formula for calculating density?

Back

Density = Mass / Volume.

Front

If an object has a mass of 20 g and a volume of 5 cm³, what is its density?

Back

The density is 4 g/cm³.

Front

What happens to the density of a substance when it is heated?

Back

Generally, the density decreases when a substance is heated because its volume increases.

Front

How can you determine if an object will float or sink in a liquid?

Back

An object will float if its density is less than the density of the liquid; it will sink if its density is greater.

Front

What is the relationship between density and buoyancy?

Back

Buoyancy is the ability of an object to float in a fluid, which is determined by the density of the object compared to the density of the fluid.

Front

List the steps to calculate the density of an irregularly shaped object using water displacement.

Back

1. Measure the initial water level in a graduated cylinder. 2. Submerge the object and measure the new water level. 3. Subtract the initial level from the new level to find the volume of the object. 4. Divide the mass of the object by its volume to find the density.

Front

What is the significance of the density of a material in real-world applications?

Back

Density is important in various applications, such as material selection in engineering, understanding buoyancy in fluids, and predicting how substances will behave in different environments.

Front

What is the density of water at 4°C?

Back

The density of water at 4°C is approximately 1 g/cm³.