Two students are comparing scientific experiments to investigations. they came up with the following ideas. student a: testing plant growth in different types of soils student b: comparing the water level in a lake during different times of the year one student gave an example of an investigation and the other gave an example of an experiment. which student gave an example of a scientific investigation? student a because it requires a hypothesis student b because it requires a hypothesis student a because it can be done in natural settings student b because it can be done in natural settings