1) The word "pencil" contains two vowels: E and I.

2) The ozone layer, located in the Earth's stratosphere, protects us from harmful ultraviolet (UV) radiation.

3) The naming of cyclones varies depending on the region. For example, cyclones in the Atlantic and eastern Pacific Ocean are named using a predetermined list of names.

4) The sitcom "Friends" is known for its iconic Central Perk coffee shop, where the main characters often gather.