Density STAAR Review

Front

What is density?

Back

Density is defined as mass per unit volume, typically expressed in grams per cubic centimeter (g/cm³) or kilograms per cubic meter (kg/m³).

Front

How does the density of an object affect its buoyancy in water?

Back

An object will float in water if its density is less than that of water (1 g/cm³) and will sink if its density is greater.

Front

What is the formula for calculating density?

Back

Density (D) = Mass (m) / Volume (V).

Front

What is the density of water at 4°C?

Back

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

Front

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

Back

Compare the density of the object to the density of the liquid; if the object's density is less, it will float; if more, it will sink.

Front

What is the relationship between temperature and the density of most substances?

Back

Generally, as temperature increases, the density of most substances decreases due to expansion.

Front

What is the significance of the density of rubber bands compared to water?

Back

Rubber bands are more dense than water, which means they will sink when placed in water.

Front

What is the unit of measurement for density?

Back

Common units for density include grams per cubic centimeter (g/cm³) and kilograms per cubic meter (kg/m³).

Front

How does the density of gases compare to liquids and solids?

Back

Gases typically have much lower densities than liquids and solids due to the greater distance between particles.

Front

What is the concept of specific gravity?

Back

Specific gravity is the ratio of the density of a substance to the density of a reference substance, usually water.