Select 4 that apply.
What four gases are essential to all life on earth?
chlorine
hydrogen
carbon-dioxide
sulfur
nitrogen
oxygen
3 answers
carbon-dioxide, nitrogen, oxygen, hydrogen
_____ are the link between the energy of the sun and every organism on the earth.
Water and salt
Light and water
Gases
Animals
Plants
Water and salt
Light and water
Gases
Animals
Plants
Plants