Density, Temperature, and Pressure

Front

What is density?

Back

Density is the mass of an object divided by its volume, often expressed in grams per cubic centimeter (g/cm³).

Front

How does density affect whether an object floats or sinks in water?

Back

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

Front

What is the relationship between temperature and density?

Back

Generally, as temperature increases, the density of a substance decreases because the substance expands.

Front

What is pressure?

Back

Pressure is the force exerted per unit area, commonly measured in pascals (Pa).

Front

How does temperature affect air pressure?

Back

As temperature increases, air pressure decreases because warm air is less dense and rises.

Front

What happens to air pressure in a high pressure system?

Back

In a high pressure system, air descends and spreads out, leading to clearer skies.

Front

What happens to air pressure in a low pressure system?

Back

In a low pressure system, air rises, leading to cloud formation and precipitation.

Front

What is wind?

Back

Wind is the movement of air from an area of high pressure to an area of low pressure.

Front

Why do helium balloons rise?

Back

Helium balloons rise because helium is less dense than the surrounding air.

Front

What is the effect of humidity on air pressure?

Back

Humid air is less dense than dry air, leading to lower air pressure.