Answer:
An experiment is structured into two groups: the control group, which does not include the critical variable under investigation, and the experimental group, which possesses the variable being examined.
The investigation encompasses three aspects: the dependent variable that is being observed, the independent variable that can be modified and impacts the dependent variable, and the constant variable, which remains unchanged throughout the study.
In the current study,
1. Hypothesis: The fossil content in the soil varies with the height changes in the bank.
2. Independent Variable: The elevation of the bank from the surface.
3. Dependent Variable: The quantity and types of fossils found.
4. Constant variable: The volume of soil collected in the bucket.
5. Control: Soil at the surface level (0 cm).
6. Number of groups: 5 distinct groups.
7. Number of trials per group: Three trials.
