Problem: -  The soft tissue decomposes - The bones are left behind - Scavengers tear the body apart and move the bones elsewhere - Wind and rain also scatter the bones further - The bones left behind will weather and become buried by sand and soil - The proteins in the bone are replaced with minerals that are dissolved in the soil - This creates a rock-like substance called a fossil - Water and wind erosion wear away the layers of soil on top of the fossil - This makes discovery of the fossil possible.  What might be the first step of the process?

A: The organism must die to begin the process


Problem: -  The bird is nurtured by its parents - And is fed food for growth - The bird grows - Begins to learn how to fly - The bird matures - The bird leaves its nest - The bird makes its own nest.  What might be the first step of the process?

A: A bird hatches from an egg


Problem: -  The radiation is aborbed by the Earth - Some of the radiation goes back into space - Some is trapped by the atmosphere - If too much heat is trapped - Global warming occurs.  What might be the first step of the process?

A: The sun gives off radiation


Problem: -  The egg hatches to form a larva, also called a caterpillar - The carterpillar molts (loses its skin) many times as it grows - The caterpillar then forms itself into a pupa, or chrysalis - The caterpillar in the chrysalis begins change, a process called mmetaphorphosis - The caterpillar completes its metamorphosis and has turned into a butterfly - The adult butterfly emerges out of the chrysalis and flys away! -   What might be the first step of the process?

A: