CHEMISTRY MIDDLE SCHOOL

Elaborate on the difference in natural occurrences between fission and fusion reactions. A) Neither fission nor fusion reactions naturally occur on earth or outer space. B) Fission reactions do not naturally occur while fusion reactions occur in the stars. C) Both fission and fusion reactions naturally occur in the pressure of the earth's core. D) Fusion reactions do not naturally occur while fission reactions occur in the volcanoes.

Answers

Answer 1
Answer:

Answer:Option 'B' is correct.

Explanation:

Nuclear fission means the splitting of larger atoms into two or more smaller atoms whereas Nuclear fusion means the splitting of two or more atoms into larger atoms.

Nuclear fission does not occur naturally but nuclear fusion occurs in stars etc.

So, only statement is correct regarding the difference in natural occurrences between fission and fusion.

Hence, Option 'B' is correct.
Answer 2
Answer: Okay then I would go with choice B since fusion takes place in the sun which is a giant star.

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Answers

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Which of the following best describes a person doing science? A. Dominick uses a computer to do his math homework. B. Lindsay measures the sizes of the craters on the Moon. C. Isabel invents a new kind of doorknob. D. Murray randomly predicts the result of a coin toss.

Answers

The correct answer is B. Lindsay measures the sizes of the craters on the Moon, is the best description of a person doing science.

Science is the practical and intellectual pursuit of the understanding of the physical and natural world that surrounds us. It involves a systematic study: observation,  experimentation, data analysis, discussion and conclusion. Science is the human effort to gather knowledge about the universe.


Answer:

B.

Explanation:

Why is it dark at night?

Answers

Because the sun sets; the earth is spinning but the Sun isn't. As the Earth spins different areas of land receive light and the rest dark. This is also connected with the changes of time in different countries.
For the same reason why it's dark in shadows - there is little to no light. 

The half of the Earth facing the Sun, is what shadows the half of the Earth facing away from the Sun. 

It's dark at night because night-time means you're in the Earth's shadow.

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Answers

Electric current passes through a filament of an incandescent bulb, thereby increasing it temperature. When current flows, it contains electrons through the filament to produce light. Typically, incandescent light bulb consists of a glass enclosure that contains tungsten filament. The glass enclosure contains either a vacuum or an inert gas that serves as the filament protection from evaporating. Incandescent light bulbs contain a stem attached at to its base to allow the electrical contacts to run through the envelope without gas or air leaks. 

What is a valence electron and why are they so important to a chemist?

Answers

Valence electrons are the electrons that reside in an atom's outermost shell. The role of valence electrons in determining an atom's reaction makes them crucial. You can count how many electrons are at the highest energy level by writing an electron configuration.

How do the valence electrons function?

The electrons in an atom's outermost shell are called valence electrons. … Because the electrons in the outermost shells of two atoms are the first to come into contact with one another and are the ones that control how an atom will react in a chemical reaction, when two atoms interact.

The outer-shell electrons of an atom are known as valence electrons. The valence electrons in an atom control its reactivity.

To learn more about Valence electron refer to:

brainly.com/question/371590

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They are important because they are the electrons that help the atom to bond with another atom. They are in the outer most shell. ☺️

Three quarters of the elements are

Answers

Answer:

Metals

Explanation:
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