C. a change of state. It can be a physical or a chemical state of change.
The variable that stays the same in an experiment is called the controlled variable
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Explanation:
Carbon dioxide isn't a polar molecule because
same nature of charge appears in opposite direction which cancel each other. So, carbon dioxide is non-polar molecule.
The correct answer is A. The magnetic field is strongest at the north pole and the south pole of a bar magnet. At the poles, the magnetic field is equally strong while the force is weaker at the middle of the bar. The field lines are closely packed at each pole and it gets wider as the lines get further from the pole.
Answer:
D:Nuclear fusion plays an important role in making elements that are heavier than helium
Explanation:
just took the test
