c6z

The … opinion in the 18th century was that Earth was very young.

prevailing

Many people once accepted the … that the sun revolved around Earth.

notion

Scientists … about the existence of life on other planets.

speculate

Giraffes … their necks to eat leaves from tall trees.

stretch up

Mendel’s paper … his experiments on inheritance.

outlines

Eye color is a genetic … inherited from parents.

trait

The bird fed its … in the nest.

offspring

Humans are … of ancient primates.

descendants

Georges Cuvier was a … in the study of fossils.

pioneer

Rivers form deltas through the … of sand and silt.

deposition

… suggests that geological change happens gradually over long periods.

uniformitarianism

The process of … helps to explain the origin of fossils.

sedimentation

Darwin’s … journey around the world lasted five years.

epic

Darwin’s … with other scientists helped him refine his ideas.

correspondence

Darwin gained an … into how species adapt to their environment.

insight

The book … a heated debate among scientists.

provoked

Darwin’s ideas caused … among people who opposed evolution.

outrage

Darwin … on natural selection in his book.

elaborates

The book was an … success.

instant

The new novel was an instant … at bookstores.

sellout