Um... who says they do? Lead has a significantly higher density than aluminum but a considerably lower melting point.
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Substances with higher density have stronger intermolecular forces between their particles, which require more energy to break apart and change phases. This results in higher boiling and freezing points because it takes more heat to break the molecules apart when they are closely packed together.
The density of solid state of matter is higher than the density of liquids and the density of liquids is higher than the density of gases.
The density of solid state of matter is higher than the density of liquids and the density of liquids is higher than the density of gases.
If the density of water is higher than 1 g/ml, it means that impurities or solutes have been added to the water, increasing its density. This can affect the freezing and boiling points of the water, as well as its ability to dissolve other substances. It may also impact the overall properties and behavior of the water.
Separation by density relies on the property that different substances have different densities, causing them to settle at different levels in a solution. With this property, substances of higher density will sink to the bottom while substances of lower density will float to the top, allowing for separation based on these differences.
Substances have different densities because of variations in mass and volume. Density is defined as mass per unit volume, so substances with more mass packed into a smaller volume will have a higher density. Factors such as molecular structure, temperature, and pressure can also influence density.