# What happens to the temperature and density between points D and A?

## What happens to the temperature and density between points D and A?

What happens to the temperature and density of the material between points D and A? Temperature increases (closer to the core) and density decreases as a result.

## What happens to the temperature and density of the material between D and C?

Where is the density of the material greater, at point B or point C? What happens to the temperature and density of the material between points D and A? Heat from the core causes the temperature of the material to rise, this means the density will decrease since hotter material is less dense than cooler material. 8.

What happens to the temperature and density of the material between Point B and Point C?

Q. What happens to the temperature and density of the material between point B and C? Temperature increases, density increases.

### What happens to the temperature and density of the material?

When temperatures increase, objects expand and become larger and therefore the density decreases. When temperatures decrease, objects condense and become smaller so density increases.

### What happened to the temperature and density of the material?

Heating a substance causes molecules to speed up and spread slightly further apart, occupying a larger volume that results in a decrease in density. Hot water is less dense and will float on room-temperature water. Cold water is more dense and will sink in room-temperature water.

How does density cause convection?

Convection is heat transfer due to a density differential within a fluid. As water’s temperature increases in the presence of a heat source, it will become less dense and rise. As it moves up and away from the heat source, it cools and becomes more dense and sinks. Air from above the ocean is colder and more dense.

#### How does temperature affect the density of a substance?

As temperature increases, the density of liquids and gases decreases; as temperature decreases, the density increases. Density is the amount of mass per unit of volume. As temperature decreases, the molecules move more slowly, so they collide less and take up less space and the substance’s density increases.

#### How does the density of ethanol change with temperature?

The table at right has the density of ethanol from 3 deg to 40 deg C in g/mL. We can see that the density decreases with temperature through this range. Unlike the situation with water, there is no maximum density point. Most other pure liquids are like ethanol in this respect.

Why does the volume of water increase with temperature?

As you heat something up, the volume usually increases because the faster moving molecules are further apart. Since volume is in the denominator, increasing the volume decreases the density. At 10 °C, 1000.0 g of water have a volume of 1000.3 mL

## Why is the density of water decreasing when the…?

The density decreases from 0.9970 g/mL to 0.9718 as it is heated. This makes sense because, as heat is added to the liquid water, there is greater kinetic energy of the molecules and there are also more vibrations of the water molecules.