1) The Earth's core is hotter than the surface of the Sun.

2) The President of the United States serves as the head of state and the head of government, responsible for leading the executive branch and representing the nation domestically and internationally.

3) The word "chocolate" contains four vowels: O, O, A, and E.

4) The largest known dinosaur, Argentinosaurus, weighed around 70-100 tons and measured up to 100 feet in length.