Use Analogies Luke found a box of photos labeled 1970–1995. Each photo shows his entire extended family. No dates appear in the photos. Luke knows that his grandmother died in 1985 and his uncle was born in 1975. Luke’s sister was born in 1990. How can Luke use this information to sort the photos into four batches? How are Luke’s relatives similar to index fossils?

Because the earth is not round ,but it may seem round when viewed from ,our planet but true some points earth is not round was an oblate spheroid -a square that it squashed as globe however is not even a perfect oblate spheroid.in fact isaac newton's first proposed that earth was not perfectly round but it was an oblate spheroid instead.that mean a square that is squashed as its poles and swollen at the