Check the box next to each answer that represents a sample that is a mixture of an element and a compound.

CO + Co
Fe + Mg
H2O + Mg
N2 +O2
H2O

What happened to the amount of carbon dioxide in the atmosphere from 2010–2017?

1) describe the physical layout of the ocean floor ? 2) explain how the dumbo octopus swims differently than other octopus species and why this would be an advantage in the aphonic zone . 3) why are the types of organisms that live at each underwater hot vent so dramatically different ?

What best discribes the relationship between wavelength and frequency in a electromagnetic wave