1) The word "computer" contains three vowels: O, U, and E.

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

3) The study of fossils is called paleontology, and it helps us understand the history of life on Earth and the process of evolution.

4) The Civil Rights Act of 1964 in the United States outlawed discrimination based on race, color, religion, sex, or national origin.