<span>air = a mixture of nitrogen, oxygen and some other bits
(pure) CO = carbon monoxide, a compound
pure water = H2O, a compound.</span>
Answer:
I don't know the options but my best guess would be erosion. Every time water comes on the beach is takes sand which erodes the beach. Hope that helps!
The moon has phases because of where the sun shines on it. Only yhe part wiyh light of the moon is visible. As the moon moves, the sun light hits is at different angles and creates the different shapes we call phases.
Comparative anatomy is the study of the similarities and differences in the structures of different species. ... Homologous structures are structures that are similar in related organisms because they were inherited from a common ancestor. These structures may or may not have the same function in the descendants.
