7. Uranium-233 and Uranium-235 are the only two isotopes of uranium used as fuels in nuclear fission reactors. If you had 2.5 kg samples of each, which one would contain the least amount of the original
radioisotope after 1 billion years? Explain your answer. The half life of U-233 is 160,000 years, the
half-life of U-235 is about 700,000,000 years.

How does a large body of water, such as the ocean, influence climate?

Observation and experimentation have led many scientists to accept a theory about the origin of the universe. this theory is called the big bang theory. scientific evidence collected and observed by scientists around the world suggests that the universe is ever expanding from a hot and dense initial state. what makes this a scientific theory? (2 points)

Which states of matter have particles that move independently of one another with very little attraction?