Two students are comparing scientific experiments to investigations. They came up with the following ideas. Student A Testing plant growth n different types of soils. Student B Comparing water level in lake during different times of year. which is a scientific experiment?

high growth (apex)

they have identical fossils of organisms that have evolved over time.

both have animal fossils preserved in them due to weathering and erosion.

they contain different fossils because life on earth has changed through time.

the fossils in them were formed on the surface of earth due to exposure to sunlight.