1. What is the definition of an ecosystem?
In your own words

Ecosystem means the biome of interacting living organisms and the environment situation. Like in the Rainforest's ecosystem :rainforest is an area of tall, mostly evergreen trees and a high amount of rainfall.

Explanation:

other quantities, called derived quantities, are defined in terms of the seven base quantities via a system of quantity equations. the si derived unitsfor these derived quantities are obtained from these equations and the seven si base units.