What enters ecosystems in the form of sunlight or combinations of elements?
food energy heat electricity photons Energy. gas sunlight
A B C D E F G H
Compounds or molecules Chemical compounds are combinations of elements.
Energy enters ecosystems in the form of sunlight or combinations of elements
What enters ecosystems in the form of sunlight or combinations of elements? (A) food (B) energy (C) heat (D) electricity (E) photons (F) Energy. (G) gas (H) sunlight