[Solved] Radioactive dating techniques have demonstrated that Earth was formed approximately ________ years ago. A) 10 billion B) 46 million C) 4.6 million D) 4.6 billion Pornography: Visual or written content that depicts sexual content for the purpose of sexual arousal. Free Speech: The right to express one's opinions publicly without governmental interference or restriction. Sedition: Conduct or speech inciting people to rebel against the authority of a state or monarch. Morse v. Frederick: A Supreme Court case that ruled on the limits of student free speech rights under the First Amendment.