Answer:
Pacific ring of fire is a path along the Pacific Ocean characterized by active volcanoes and frequent earthquakes.
Explanation:
The spelling of the Pacific is wrong.
True mechanical energy is the sum of potential and kinetic energies
Answer:
In an observational study, we measure or survey members of a sample without trying to affect them. In a controlled experiment, we assign people or things to groups and apply some treatment to one of the groups, while the other group does not receive the treatment.
Explanation: