Question

Drag and drop the words or phrases that accurately complete the paragraph.

Charles Darwin's theory of
was developed through careful observations and the collection of living things and fossil s. His work changed the world's understanding of biology and offered new suggestions as to how living things have changed over the years. In addition to observing living things, Darwin found many fossils that gave clues into the Earth's past. A
is any preserved remains, impression, or trace of a once-living thing.


Comparing the fossils of extinct species to the living species led him to believe that the fossils represented ancestors of the living ones. Darwin made three important conclusions. First, the Earth was
of years old. Next, the similarities between the fossils and living organisms must mean that they have ancestors in common. Last, species have evolved, or changed, over the course of long periods of time.

fossil
evolution
relativity
specimen
billions

Answer 1

Answers:
- evolution
- fossil
- billions

Completed paragraph:
Charles Darwin's theory of evolution was developed through careful observations and the collection of living things and fossils. His work changed the world's understanding of biology and offered new suggestions as to how living things have changed over the years. In addition to observing living things, Darwin found many fossils that gave clues into the Earth's past. A fossil is any preserved remains, impression, or trace of a once-living thing.

Comparing the fossils of extinct species to the living species led him to believe that the fossils represented ancestors of the living ones. Darwin made three important conclusions. First, the Earth was billions of years old. Next, the similarities between the fossils and living organisms must mean that they have ancestors in common. Last, species have evolved, or changed, over the course of long periods of time.