This isn’t physics but is science and I couldn’t find science so anyways here’s the question How are matter and energy conserved in ecosystem?

Which compound is held together by the electrostatic force between two ions? a. co2 b. cci4 c. h2s d. mgf2

Global climatic patterns are changing because of the melting of polar ice caps. the melting of polar ice caps is an example of the interaction between the atmosphere and cryosphere cryosphere and geosphere hydrosphere and geosphere biosphere and cryosphere

Which is a substance that can be separated by physical means and is not the same throughout