Question

13 multiple choice 2 points a broad body of evidence, subject to revisions, supported by different kinds of scientific investigations and often involving the contributions of scientists from different disciplines is necessary to develop an inference a fact a theory a prediction 14 multiple choice 2 points a student places a magnet next to a metal fork and records what happens. next, he places the same magnet next to a plastic fork and records what happens. which question is the student most likely exploring with this investigation? how do different materials react to magnets? do items other than magnets have magnetic power? what causes magnets to be attracted to metal objects? does the size of a magnet affect its magnetic power?

Explanation:

For question 13:
A theory is a well - supported explanation that is based on a broad body of evidence, can be revised as new evidence is found, and often involves contributions from multiple scientific disciplines. An inference is a conclusion based on limited evidence. A fact is a proven piece of information. A prediction is a statement about what will happen in the future.
For question 14:
The student is testing two different materials (metal and plastic) with a magnet. The variable here is the material. The first option “How do different materials react to magnets?” directly relates to the experiment where different materials (metal fork and plastic fork) are exposed to a magnet. The second option is about non - magnet items having magnetic power (not the focus here). The third option is about the cause of magnet - metal attraction (not explored by just testing two materials). The fourth option is about magnet size (not varied in the experiment).

Answer:

1. C. a theory
2. A. How do different materials react to magnets?