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.
A xylophone is a type of musical instrument. It has bars of different lengths arranged side by side. When a performer strikes the bars with a mallet or a stick, the bars produce sounds. Each bar is tuned to produce a particular note. The word xylophone is from the Greek words xylon and phone, wood and sound.. It is a percussion instrument consisting of a set of graduated, tuned wooden bars supported at nodal (nonvibrating) points and struck with sticks or padded mallets.