Lesson 1- Darwin's Theory Flashcards
The HMS Beagle set sail from where to where and how long?
Set sail from England on a 5 year trip around the world
In fact, scientists have identified more than . _______ species of organisms on earth.
1.6 million species
The exact number of species is unknown-why?
Because many areas of earth have not yet been studied.
Charles Darwin was a person who observes and studies the natural world-what is that?
A Naturalist
A _______ is a group of similar organisms that can mate with each other and produce fertile offspring.
Species
Darwin was amazed by the _______ of _______ _______ that he saw on his voyage.
Diversity, living things
Darwin saw _______ of animals that had died long ago.
Fossils
Darwin became convinced that species do not _____________.
Do not always stay the same
A _______Is a well tested concept that explains a wide range of observations
Scientific Theory
A ______ is the preserved remains or traces of an organism that lived in the past.
A Fossil
Beak shape is an example of __________.
Adaptation
Darwins ideas are often referred to as a _______________.
Theory of evolution
Darwin was convinced that organisms ____________.
That organisms change over time
The process of change over time is called _____.
Evolution
An adaptation is a trait that increases and organisms ability to _______ and ___________
Survive, reproduce
Over how many years did Darwin consult other scientists and gather more information?
20 years
From the evidence he collected, Darwin concluded that organisms on the Galápagos Islands ____________.
Had changed over time
Only the organisms with desired characteristic such as color are bred, what is this?
Artificial selection
I get it! Now I know that Darwin’s hypothesis was ___________.
That species change over many generations and become better adapted to new conditions
What did Darwin hypothesize?
Darwin hypothesized that species change over many generations and become better adapted to new conditions
What did Darwin breed himself?
He bred pigeons with large, fan shaped tails.
What did Darwin want to know about organisms?
He wanted to know how organisms changed
Make a list of three observations that Darwin made during the beagle’s voyage.
- There were many animals he hasn’t seen before.
- Evolution
- The finches adaptation to their environment
What year did the British ship HMS Beagle set sail?
1831
A trait that’s increased an organisms ability to survive and reproduce
adaptation
