____________ involves watching subjects or phenomena in their natural environments.

A well-developed paragraph contains three to five sentences.

The control group refers to the individuals who are in charge of running the experiment.

Which of the following would specifically impact an investigation involving citizens of the European Union?

Demonstrated the existence of animal electricity.

Discovered the first natural magnet, lodestone.

The first person to recognize the connection between electricity and magnetism was….

The force of attraction between two charged spheres can be calculated from:

The magnitude of the resistance of a wire depends on:

Demonstrated that a lightning stroke was an electric discharge.