Name Date Block
The Theory of Evolution
Answer the questions below while watching the video clip.
1. When ________________________ published his book proposing the theory of evolution
in 1859, it created a controversy that continues to this day.
2. There are 2 key notions (beliefs) in Darwin’s theory:
a. All species ________________ from _______________ forms of life
b. Species _______________ to their environments due to ________________
___________________.
A New Understanding of Life
3. Fossilized bones of __________ species have been found by people around the world
for hundreds or even thousands of years, but no one had the means of measuring how
_______________ the bones were.
4. Different types of fossils were ___________________ and ___________________ and
many look ___________________ like the animals or plants that we see today.
5. Darwin’s Theory of Evolution provided a ____________________ that helped
scientists make sense of it all.
From the Big Bang to Early Life
6. Some scientists believe that life began as a tiny ____________________ cell 3.8
BILLION years ago. This cell is the ancestor of all life on the planet.
7. Sometime around 1.8 BILLION years ago, the ___________________ cells first begin to
appear in the fossil record.
8. Once the heredity information of the organism was determined by both the male and the
female, the possibility of ________________ ____________ became much greater.
