This is a direct and immediate method of painting, good for plein-air painting or for producing a painting during a single period of classroom instruction. The wet-on-wet method allows you to blend colors directly on the canvas rather than mixing them on your palette. It works well for creating light fluffy clouds, atmospheric skies, different bodies of water, and smoky or misty mountains. It is a very loose method of painting with the painting gesture often consisting of quick brushstrokes of short back and forth movements, or swirling or tapping motions, seeming to magically bring forth a recognizable landscape.
A liquid crystal thermometer , temperature strip or plastic strip thermometer is a type of thermometer that contains heat-sensitive ( thermochromic ) liquid crystals in a plastic strip that change colour to indicate different temperatures .  Liquid crystals possess the mechanical properties of a liquid, but have the optical properties of a single crystal. Temperature changes can affect the colour of a liquid crystal, which makes them useful for temperature measurement. The resolution of liquid crystal sensors is in the °C range. Disposable liquid crystal thermometers have been developed for home and medical use. For example if the thermometer is black and it is put onto someone's forehead it will change colour depending on the temperature of the person.