How does salinity affect density

Chemistry Measurement Density. Nov 18, Explanation: The density of pure water is 1. Related questions How can density be used to identify substances? How can you find mass from density? How are density mass and volume related? How do you calculate mass using density and volume? How do you convert mass to density? Add to collection. Nature of science In science, models are a visual way of linking theory with experiment.

Go to full glossary Add 0 items to collection. Download 0 items. Twitter Pinterest Facebook Instagram. Email Us. See our newsletters here. This is represented by the increase in the size of the box from Fig. The warmer the water, the more space it takes up, and the lower its density. When comparing two samples of water with the same salinity, or mass, the water sample with the higher temperature will have a greater volume, and it will therefore be less dense.

The bag of liquid simulates a layer of water. The relative density of the liquid in the bag compared to the liquid in the beaker can be determined by observing whether the bag sinks or floats. Activity Activity: Density Bags. Test the effects of salinity and temperature on the floating and sinking of liquid samples in bags. If water masses have salinity or temperature differences, they will form water layers because they have different densities.

Water layers can sometimes be felt when swimming. The relative density of one water mass in relation to another determines whether a layer of water floats or sinks. Density can be determined by measuring the mass and volume of an object. In the Density Bags Activity , density was not calculated. Instead, relative density was determined by observing whether a bag of one liquid floated or sank in another liquid.

A bag of liquid that sank was determined to be more dense than the liquid in the beaker. A bag of liquid that floated was determined to be less dense than the liquid in the beaker. The motion of any object is due to forces , which are pushes or pulls. Vertical—up-and-down—movement of water masses in the ocean can be explained in terms of two forces. The gravitational force G of the earth pulls downward and is proportional to the mass of an object.

The gravitational force on an object is also called weight. The force due to gravity is greater on objects that are more massive, or weigh more. The buoyant force B of water pushes up. In the third century B.

He observed that the volume of water pushed out of a tub, or displaced, by an object was equal to the volume of the object. The buoyant force of the water is equal to the weight of the water displaced.

An object accelerates when the forces on that object are unequal. Although acceleration is commonly used to describe an object that is speeding up, the scientific definition of acceleration means changing speed. An accelerating object can be speeding up or slowing down. An object will always move in the direction of the greater force.

An object may accelerate downwards sink or upwards rise in a body of water. If all of the forces on an object are balanced, there is no acceleration.