Uranus and Neptune are made primarily of hydrogen compounds, with smaller traces of hydrogen, helium, metal and rock. The most common hydrogen compounds are methane (CH4), ammonia (NH3), and water (H2O). The farther away a planet is from the Sun, the cooler its atmosphere will be.
Musical.ly is a popular app for creating 15-second music videos. How it works is kids select snippets of popular songs and record themselves singing, lip-syncing or dancing. Some kids skip the music and perform 15-second comedy skits.
Melodies can interact a number of different ways, so there are several broad terms that describe the different kinds of textures based solely on melody. Monophony is the texture comprised of one-and only one-melody. Polyphony is the texture comprised of more than one melody, and Heterophony is the texture of the same melody played in different parts in slightly different ways. Call and Response is made up of two different melodies in alternation.