# What Factors Influence Density In Seawater?

Contents

## What Factors Influence Density In Seawater??

The density of seawater depends on temperature and salinity. Higher temperatures decrease the density of seawater while higher salinity increases the density of seawater.

## What factors influence density in seawater quizlet?

The temperature and salinity of seawater influence its density. Temperature and salinity vary with latitude. Therefore the density of seawater also varies with latitude.

## What are the 3 factors that affect the density of ocean water?

Of the three factors—temperature salinity and pressure—that have an effect on water density temperature changes have the greatest effect. In the ocean the thermocline (a water layer within which temperature decreases rapidly with depth) acts as a density barrier to vertical circulation.

## What does seawater density depend on?

The seawater density rho in the ocean mainly depends on salinity S temperature T and pressure p. Pressure only plays a role at depths much greater than those of coastal waters.

## What factor effects the density of seawater the greatest?

That leaves temperature and salinity as the primary factors determining density and of these temperature has the greatest impact (Figure 6.3. 1). Figure 6.3. 1 Global sea surface density.

## What are the two main factors that influence density of seawater?

There are two main factors that make ocean water more or less dense: temperature and salinity. Cold salty water is denser than warm fresher water and will sink below the less dense layer. Density is defined as the measure of a material’s mass (e.g. grams) divided by its volume (e.g. milliliters).

## What are the three factors that affect seawater density describe how each factor influences seawater density including which one is the most important?

Salinity temperature and depth all affect the density of seawater. Density is a measure of how tightly a certain amount of matter is packed into a given volume. The more the stuff is packed in the higher the density.

## What two factors influence seawater density and which one has a greater influence on surface seawater density?

What two factors influence seawater density? Which one has a greater influence on surface seawater density? Salinity and temperature. Temperature has the greatest influence because variations in surface temperature are greater than salinity variations.

## What causes density?

The density of a material varies with temperature and pressure. … Increasing the pressure on an object decreases the volume of the object and thus increases its density. Increasing the temperature of a substance (with a few exceptions) decreases its density by increasing its volume.

## What makes water more dense?

Water molecules are made up of oxygen and hydrogen atoms bonded together. Oxygen is heavier and smaller than carbon so a volume of water molecules is heavier than the same volume of oil molecules. This makes water more dense than oil.

## What three physical processes create dense water?

The most dense water is found o the bottom but the physical processes that create this dense water (evaporation freezing or cooling) are strictly ocean surface features. Therefore dense bottom water must sink originally from the surface.

## How does water density vary with depth in the ocean?

The water molecules pack together tighter as pressure increases –the pressure increase with depth due to the weight of the water above and causes the greatest density changes in seawater with depth (greater than the density changes due to temperature and salinity changes).

## What makes salt water dense?

Adding salt to water makes the water denser. As the salt dissolves in the water it adds mass (more weight to the water). This makes the water denser and allows more objects to float on the surface that would sink in fresh water. About 3.5 percent of the weight of seawater comes from the dissolved salts.

## Which of the following characteristics alters the density of ocean water?

Temperature changes effect seawater density: as water cools its density increases. As water cools H2O molecules pack more closely together (because the molecules are vibrating less at lower temperatures) and take up less volume. The same number of water molecules in smaller volume results in a higher density.

## How does salt affect the density of water?

Adding salt to the water increases the density of the solution because the salt increases the mass without changing the volume very much. When enough salt is added to the water the saltwater solution’s density becomes higher than the egg’s so the egg will then float!

## How does salinity affect density?

Salinity Affects Density

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When salt is dissolved in fresh water the density of the water increases because the mass of the water increases. … When comparing two samples of water with the same volume the water sample with higher salinity will have greater mass and it will therefore be more dense.

## Which of the following are the factors affecting on the distribution of ocean water?

The factors affecting distribution of ocean temperature are latitude prevailing winds ocean currents and local weather. The factors affecting distribution of ocean temperature are latitude prevailing winds ocean currents and local weather.

## What causes density to increase or decrease?

Heating a substance causes molecules to speed up and spread slightly further apart occupying a larger volume that results in a decrease in density. Cooling a substance causes molecules to slow down and get slightly closer together occupying a smaller volume that results in an increase in density.

## What is liquid density?

The density of a liquid is a measure of how heavy it is for the amount measured. If you weigh equal amounts or volumes of two different liquids the liquid that weighs more is more dense. If a liquid that is less dense than water is gently added to the surface of the water it will float on the water.

## Which part of the water has greater density?

Density is measured as mass (g) per unit of volume (cm³). Water is densest at 3.98°C and is least dense at 0°C (freezing point).

## How does composition affect density?

One factor affecting the density of a material is how concentrated the atoms are in a given volume. In some cases materials made of atoms with a lower atomic weight have a greater density than those with a higher atomic weight due to the atoms being more tightly packed.

## How does density work in water?

Just like a solid the density of a liquid equals the mass of the liquid divided by its volume D = m/v. The density of water is 1 gram per cubic centimeter. The density of a substance is the same regardless of the size of the sample.

## Which of the following processes can cause surface seawater to increase in density?

The main processes that increase seawater density are cooling evaporation and ice formation. Evaporation and ice formation cause an increase in density by removing fresh water leaving the remaining seawater with greater salinity (see section 5.3).

## How does pressure affect density?

Density is directly proportional to pressure and indirectly proportional to temperature. As pressure increases with temperature constant density increases. Conversely when temperature increases with pressure constant density decreases.

## What causes water to become denser when it is carried to the polls by surface currents?

What causes water to become denser when it is carried to the poles by surface currents? … Wind direction the spin of Earth and differences in temperature contribute to currents.

## How does density affect ocean currents?

Differences in water density affect vertical ocean currents (movement of surface ocean water to the bottom of the ocean and movement of deep ocean water to the surface). … Denser water tends to sink while less dense water tends to rise.

## Which of the following increases water density?

The density of water increases as the salinity increases. The density of seawater (salinity greater than 24.7) increases as temperature decreases at all temperatures above the freezing point. The density of seawater is increased by increasing pressure.

## How can you increase the density of pure water?

However temperature fluctuates naturally so if you wish to increase the density permanently you can add salt to the water. This increases the water’s mass without increasing its volume. Thus its density increases.

## What makes salt water more dense than freshwater?

The answer is just one word-salt. When salt is dissolved in water as it is in ocean water that dissolved salt adds to the mass of the water and makes the water denser than it would be without salt. Because objects float better on a dense surface they float better on salt water than fresh water.

## What has higher density saltwater or freshwater?

saltwater has a higher density than freshwater. less dense matter will lie above more dense matter.

## What are the main factors that cause a change in the density of water in the ocean select all that apply?

There are two main factors that make ocean water more or less dense than about 1027 kg/m3: the temperature of the water and the salinity of the water. Ocean water gets more dense as temperature goes down. So the colder the water the more dense it is. Increasing salinity also increases the density of sea water.

## What three factors are most important in determining the composition of ocean water?

Temperature salinity and pressure affect the density of seawater. Large water masses of different densities are important in the layering of the ocean water (more dense water sinks). As temperature increases water becomes less dense. As salinity increases water becomes more dense.

## What are two factors that control the salinity of seawater quizlet?

Evaporation and temperature are the two main factors that control the concentration of salts in seawater.

## What are the factors affecting the density of gases?

The density of gases depends upon the temperature. The higher the temperature the more the molecules are spread out and the lower the density as shown in the graphic on the left. The result is that warm gases rise and cool gases sink. The same concept helps to explain the weather resulting in high and low pressures.