Living Environment HW 23

Name


  1. What happens to life on Earth as time goes by?
    Life becomes simpler and less diverse.
    Life becomes complex and less diverse.
    Life becomes simpler and more diverse.
    Life becomes complex and more diverse.


  1. If you are looking at an evolutionary tree diagram, how will you tell where is the past?
    The past is always on the bottom.
    The past has lots of branches.
    The past has very few branches.
    The past is always on the top.


  1. If you are looking at an evolutionary tree diagram, how will you tell where is the present?
    The present is always on the bottom.
    The present has lots of branches.
    The present has very few branches.
    The present is always on the top.


  1. How do scientists tell how old fossils are?
    They estimate because old fossils are always broken.
    They estimate because old fossils are found in rock layers near the surface of the Earth.
    They estimate because old fossils are found in rock layers deep within the Earth.
    They estimate because new fossils are easy to find.


  1. Explain, in your own words, how scientists are able to take fossil evidence to create evolutionary tree diagrams that show the relationships between different species living on Earth today.