Density is the amount of mass in a specified space. It is a way to measure how compact an object is. It is the number of molecules in an area or the mass per unit volume of matter. The denser an object is, the less likely it is to float.Continue Reading
Density can be better explained to kids by using an example. Two identical boxes in size and in shape are both filled with objects. One is stuffed with cotton balls, and the other is filled with marbles. The box containing marbles is heavier and denser than the box full of cotton balls. The contents of the denser box are closely arranged together compared to the contents of the other, which has lots of air in between.
Another good example is transferring gas inside a small bottle to a bigger bottle. The gas is less dense in the bigger container. The number of gas molecules is preserved, but it is more spread out when it fills the bigger bottle. There are fewer gas molecules in a set volume compared to when it is occupying the smaller bottle and the molecules are closer together.Learn more about Atoms & Molecules
Density is the mass of an object divided by the volume of space the object takes up. This expression gives the numerical amount of mass per unit volume of the object's material.Full Answer >
Properties of magnesium include its atomic number of 12, atomic mass of 24.30 grams per mole and a density of 1.74 grams per cubic centimeter. It has a boiling point of 1,994 degrees Fahrenheit and a melting point of 1,202 degrees Fahrenheit.Full Answer >
The number of molecules in a liter depends on the substance, its density and its atomic mass. If the substance is a gas, the density is affected by temperature and pressure.Full Answer >
Density independent factors limit population sizes in an ecosystem due to events that occur regardless of the density of a certain population. Density independent factors include environmental stresses, weather, sudden climate changes, environmental pollutants and nutrition limitations. They are also called limiting factors because they cause a population of plants or animals to stop growing in a particular area.Full Answer >