Organisms that later became good index fossils lived over a

wide geographic area and existed for a short geologic time.

Explanation:

Index fossils are the type of fossil that are used to define periods of geologic time.

Geologic time can simply be explained as the extensive interval of time occupied by the geologic history of Earth. And it is known to be the main factor determining the degree of rock compaction.

In this case, the index fossils are known to be widely distributed, but are limited in time span, or geologic time.

the animal that would be cutest if scaled down to the size of a cat? elephant

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.