The map always shows the maximum UV index. When you select a city, the maximum UV index is shown by default, but you can switch this to hourly. When you do this, the site selects the nearest hour; e.g. at 9:45, 10:00 will be selected, and at 11:20, it will show the UV index for 11:00.
States of matter are generally described on the basis of qualities that can be seen or felt. Matter that feels hard and maintains a fixed shape is called a solid; matter that feels wet and maintains its volume but not its shape is called a liquid. Matter that can change both shape and volume is called a gas. Some introductory chemistry texts name solids, liquids, and gasses as the three states of matter, but higher level texts recognize plasma as the fourth state of matter. Like a gas, plasma can change its volume and shape, but unlike a gas, it can also change its electrical charge. The same element, compound, or solution can behave very differently depending on its state of matter.
PHYSICAL STATES OF MATTER ABSTRACT: There are five main states of matter. Solids, liquids, gases, plasmas, and Bose-Einstein condensates (BEC) are all different states of matter. Each state has its own physical traits and ways of interacting with the world of chemistry. Depending on your definitions, there can be over a dozen states of matter. Each of these states is also known as a phase. Elements and compounds can move from one phase to another when specific physical conditions are present. One example is temperature. When the temperature of a system goes up, the matter in the system becomes more excited and active. Scientists say that it moves to a higher energy state. Generally, as the temperature rises, matter moves to a more active state. A phase describes a physical state of matter. The key word to notice is physical. Things only move from one phase to another by physical means.