Part of the earth that is always changing

21. When does a nuclear fission reaction occur? A. When a nucleus is cut in two using a really sharp knife. B. When two nuclei collide and combine to one. C. When a large nucleus spontaneously is divided for no apparent reason. D.

Cavendish carried out a second experiment to test the properties of the hydrogen gas produced in the experiment. Was this experiment also a chemical reaction? Explain.

Most organic polymers are named based on the monomers used in their production. However, poly (vinyl alcohol) (PVA) is not made from vinyl alcohol, but instead from vinyl acetate that is hydrolized after formation of the polymer.

How does chromatography relate to gel electrophoresis

If an atom loses a proton, what happens? 1. Its mass is lowered, and it becomes a different element. 2. Its mass stays the same, and it is still the same element. 3. Its mass is lowered, but it is still the same element. 4.

Which statement best describes control rods? They are unmovable pieces. They are inert. They supply neutrons to start the nuclear chain reaction. They drive the generator

A large rift valley can be found along the east coast of Africa. It has been slowly widening over time, and it is now wide enough to contain many large lakes. Which of these best explains the slow widening of this rift valley over time? A.

How does the density of aluminum compare with the density of gold

Which of the following provided a hypothesis as to how the universe began? A) the moon collision theoryB) the big bang theoryC) the antimatter theoryD) the molten theory

What is the most common natural fiber used in textiles?