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?

Back

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

Front

If an object has a density of 2 g/cm³, will it float or sink in water?

Back

It will sink, as its density is greater than that of water.

Front

What is the relationship between mass and volume in determining density?

Back

Density increases with an increase in mass if the volume remains constant, and decreases with an increase in volume if the mass remains constant.

Front

How can you determine the density of an irregularly shaped object?

Back

You can determine the density by measuring its mass and then using water displacement to find its volume.

Front

What is the significance of the density of materials in engineering and construction?

Back

The density of materials affects their strength, stability, and suitability for various applications in engineering and construction.

Front

What happens to the density of most substances when they are heated?

Back

Most substances expand when heated, which decreases their density.

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.