A Student notes that a chunk of wood is much lighter after it has been burned. He concludes that burning a substance destroyed some of the mass in that substance. Doi you agree or disagree explain why or why not.

The speed of light is around 6.706×10^8 miles per hour. what is the speed of light in units of miles per minute?

What term is applied to a scientist who studies ancient life, including animal and plant fossils a. anthropologist b. dendroclimatologist c. geophysicist d. paleontologist

16. why must the number of electrons lost equal the number of electrons gained in every redox reaction? use 3 – 4 sentences in your own words to address this question. 18. what type of radiation is emitted when chromium-51 decays into manganese-51? show the nuclear equation that leads you to this answer. 19. a radioactive nucleus alpha decays to yield a sodium-24 nucleus in 14.8 hours. what was the identity of the original nucleus? show the nuclear equation that leads you to this answer.