1) The word "island" contains two vowels: I and A.

2) The most-watched television event in the United States is the Super Bowl, with millions of viewers tuning in each year.

3) The tongue of a blue whale is so big that about 50 people could stand on it.

4) The intensity of cyclones is often measured using the Saffir-Simpson Hurricane Wind Scale, which categorizes them based on their sustained wind speeds.