Examine the sample rock outcrops with index fossils that follow and the key that accompanies the sample
Use the index fossils to determine the proper relative age of the three rock columns.

Please help!!

individual oxygen atoms are formed during photosynthesis.-c.

i'd say that the moon rock is about 2.2 billion years old.

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explanation:

water is a polar molecule. a chemical bond is a force of attraction between atoms or ions. bonds form when atoms share or transfer valence electrons. atoms form chemical bonds to achieve a full outer energy level, which is the most stable arrangement of electrons. so, false

explanation:

in h2o molecule, two water molecules are bonded by a hydrogen bond but the bond between two h - o bonds within a water molecule are covalent. the greater the electronegativity difference, the more ionic the bond is. bonds that are partly ionic are called polar covalent bonds. nonpolar covalent bonds, with equal sharing of the bond electrons, arise when the electronegativities of the two atoms are equal.