Question 21(Multiple Choice Worth 4 pollies) [0.04H]Nick made the chart below to show the future impact of four energy production technologies on the environment.
Tidal Power
Name of
energy
production
technology
Wave power
Current power
Ocean thermal
Energy
Impact on
environment
Emission of
greenhouse
gases into the
atmosphere
Decrease in Destruction of
the number animal habitats
of migratory because of change
birds
in coastline
Increase in fish
population because
of decrease in
current strength
For which of these energy production technologies did Nick write correct future impacts on the environment?
O ocean thermal energy and wave power
O wave power and tidal power
O tidal power and current power
O current power and ocean thermal energy

Which statements best describe the differences or similarities between a comparative investigation and an experimental investigation? check all that apply. experimental investigations are best for showing cause-and-effect relationships, while comparative investigations do not necessarily show this type of relationship. comparative investigations are often impractical and unrealistic, while experimental investigations are the most practical and realistic kinds of investigations. comparative investigations allow for the use of a wide range of variables but do not have a control group, while experimental investigations involve variables that can be controlled. both experimental investigations and comparative investigations are designed to answer scientific questions. both experimental investigations and comparative investigations focus on making observations rather than collecting new data.