Problem: - Networks of trees start forming - The trees die off - The dead material provides nutrients for more trees - The rising trees provide shelter - And more organisms begin to thrive What might be the last step of the process?

A: The ecosystem known as a forest is made.

Problem: - Minerals fill spaces between bits of sediment - The sediments become glued together - The glued together parts become hard like cement - The sediment becomes a big rock - The rocks erode slowly - The rocks come apart - The rocks become smaller rocks - The rocks continue to erode into smaller rocks What might be the last step of the process?

A: The process starts again.

Problem: - A star burns in space - Eventually it burns all its hydrogen - Becomes a red giant - Once the red giant burns itself out - The core of the star collapses - The gasses will start to disperse - Only the core is left What might be the last step of the process?

A: A white dwarf has been formed.

Problem: - A sperm and egg meet inside a woman's fallopian tube - The fertilized egg, now a zygote, travels to the uterus - The zygote implants in the uterus - The zygote becomes an embryo - The embryo becomes a fetus - The fetus grows for approximately 9 months - The woman gives birth to a baby - The baby grows into a child - The child becomes an adult What might be the last step of the process?

A:
The adult mates with another adult