Yes, that is the way we usually describe it because it follows classic observations. In physics, we tend to look at it from the other end. We measure how hard the molecules bounce off each other and make a few computations to come out with a temperature. When we heat something like water, we are adding energy to the molecules and they jostle around, we see it as expansion. If we keep heating it, the molecules eventually get so active that they bounce off each other harder than the intermolecular force holding them together, it expands even more and becomes a vapor. When we stick a thermometer in a liquid, the molecules bouncing off the thermometer add energy to the liquid in it which expands, and we read the temperature from the marks the manufacturer put on it. A few links below give more information about heat than I can explain.
When warm air molecules move farther apart, the air becomes less dense because there is more space between the molecules. This causes the warm air to rise, as it is lighter than the surrounding cooler air. As the warm air rises, it cools and can lead to cloud formation and possibly precipitation.
Temperature is an indirect measurement of a system's molecule's average kinetic energy (KE). As the temperature of a system increases, so does the KE of the molecules. This causes the molecules to move farther apart. You can see this most easily in an old (not digital) thermometer.
Hydrogen gas can expand when heated, as the molecules gain energy and move more rapidly, increasing the pressure inside a container or a system. This expansion occurs because the kinetic energy of the particles increases with temperature, causing them to move further apart from each other.
Heating water molecules causes them to move faster and faster. Water when cool is in a way (sticky). When heated the water molecules are moving far too quickly stick together. The heated water molecules become less dense and may stick to air molecules. Floating into and combining with the atmosphere.
The entropy (order of the matter) increases. Kinetics, the measurement of movement, states that when matter (atoms and molecules) are heated, they move faster and begin to collide with one another or, against the boundaries of the system they are in (flask, earl-meyer glass). Also, at certain temperatures, they will ignite, much like in the movies when a fast moving object enters the Earth's atmosphere from space.
Matter expands when heated, because molecules move farther apart.
When things are heated, the heat causes the molecules to move faster and that forces them farther apart, causing the item to expand.
When a gas is heated it's molecules begin to move faster and farther apart, juat as all other states of matter will when heated.
Water atoms do not expand or multiply when heated. When water is heated, the heat energy causes the water molecules to move faster and farther apart, which results in the expansion of the water volume. The number of water molecules remains the same.
When a liquid is heated, the heat increases the kinetic energy of its molecules, causing them to move faster and farther apart. This increased motion and separation between molecules results in the expansion of the liquid, making it occupy more space.
When a liquid is heated the particles increase speed and then move farther apart. Also the liquid and bubble up.
A liquid to a gas.
The molecules in side move or spread apart
When the air inside a balloon is heated, its density decreases. This happens because the air molecules gain energy and move farther apart, resulting in a decrease in the air's density.
When a gas or liquid is heated, the molecules gain kinetic energy, causing them to move faster and spread apart. This increases the volume of the substance because the molecules are further apart, leading to an expansion in the material.
Two substances that expand when heated are water and mercury. Heating these substances causes their molecules to become more energized and move farther apart, leading to an increase in their volume.
When an object is heated and its temperature increases, the atoms within the object move more rapidly, causing them to push farther apart. This expansion results in an increase in the volume of the object.