Download Crossword Puzzle: Ch10

Name _______________________________________________________
Date ____________Period ____
Crossword Puzzle:
Ch10 - Evolution & Natural Selection
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WORD BANK:
words in parenthesis are not in the puzzle - they are just for reference
catastrophism
specialization
DNA evidence
overproduction
uniformitarianism
branching diagram
vestigial
genetic variation
(law of) superposition
species
appendix
struggle for survival
fossil record
population
(natural) selection
competition
evolution
selective breeding
Charles Darwin
predation
adaptation
climate
HMS Beagle
reproduction
Cenozoic
biome
Ecuador
speciation
Mesozoic
comparative anatomy
Galapagos (Islands)
extinction
Paleozoic
(common) ancestor
finches
ACROSS:
1) Organisms don't usually change (evolve) unless something makes them change - disease,
predators, competition, etc. Darwin called these reasons to change a(n) ___.
4) Right now, we live in the Age of Mammals. This is also known as the ___ Era.
6) All organisms that share exactly the same adaptations, and can reproduce and pass on those
same adaptations, make up what is called a(n) ___.
9) The theory that says that the Earth is slowly changing, and it has always changed at the same
speed, is known as ___.
12) Charles Darwin travelled all over the world, making observations and writing things down.
But he is most famous for his visit to the country of ___, which is in South America.
14) When different cells in a multi-cellular organism do different jobs, the organism has a better
chance of surviving. Doing different jobs is called ___.
15) Even though whales, horses, and bats don't look anything like humans, we actually share a lot in
common, like live births & warm-blooded. Scientists think its because we all share a common ___
17) A significant number of organisms in the same species, that all share the same resources,
such as space, food, water - are grouped together into a(n) ___.
19) A biome is an area of the Earth that has a unique geography, as well as a certain average
yearly temperature and rainfall. Average rainfall and temperature is known as ___.
21) Charles Darwin travelled all over the world, on a ship known as the ___.
23) During meiosis (creation of sex cells), crossing over can occur, which mixes up genes.
Mutations (mistakes) can happen as bases are copied. And when sex cells are combined,
the offspring gets some info from Mom and some from Dad. All of these things lead to ___,
which gives the species a much better chance of survival, because all the different traits give
nature more choices to choose from.
26) Different species are adapted to the different geographies and climates where they live. An
area that has a unique climate and geography is known as a(n) ___.
28) Whales and snakes have vestigial leg bones that prove they evolved from animals that use to
walk on the Earth's surface. Humans have a vestigial organ called a(n) ___, which proves
we used to have a common ancestor that ate seeds and needed this organ to digest them.
30) The Age of Reptiles was the age right before ours, when Dinosaurs ruled the Earth. This age
is more correctly called the ___ Era.
31) ___ is the slow gradual change that occurs as a species tries to survive any environmental
changes that happen over long periods of time.
32) A(n) ___ is any change to one of your traits, which helps you survive better than before.
33) Darwin said that in order for a species to evolve, it can't just develop a new adaptation to survive.
It also has to undergo ___ so that it can pass the adaptation to future generations.
34) Darwin studied many different animals and plants on his journey. But he is most famous for
his observations concerning the evolution of beak shapes in ___ on different islands.
DOWN:
1) Darwin's theories on evolution say that the environment will choose the traits that have the
best chance of survival. He called his theory ___.
2) A whale has tiny rear leg bones that do not work. Humans have a small organ that also has
no purpose. We say that these structures are ___, which means small and of no purpose.
3) One of the things that organism struggle to survive is a lack of resources like food and water.
___ is when two species fight over the same resources. The one with the better adaptation
usually wins = "survival of the fittest".
5) Remember… the test on Wednesday will be mostly Chapter Ten, but a little of Eight and ___.
7) The law of ___ says that the oldest layers of sedimentary rock will be on the bottom, and the
newest layers closer to the top. This helps us figure out the relative age of fossils in the rock.
8) The theory of ___ says that the world was formed in sudden and remarkable stages, where
the Earth changed very suddenly and dramatically, instead of slowly and uniformly.
10) All the fossils we find, which help us "see" evolution happens, make up what is known as the ___.
11) When a new species forms, it makes a new section on the "tree of life". Scientists use clues
they find to create a(n) ___, which shows how different species are actually related.
13) For thousands of years, as humans have been cultivating crops and domesticating animals,
they have been choosing the traits they like the best. This is how we got fast horses, juicy
corn and apples, trainable dogs, etc. This process of humans picking traits is known as ___
16) Even though horses, whales, and bats don't look anything like humans, scientists are sure
we come from a common ancestor. One reason is because of ___, which is when we look
at similar body structures to see a relationship.
18) The Age of Marine Life, also known as the ___ Era, is when life really "exploded" on the
Earth. This is when simple multi-cellular organisms started becoming more and more
complex, filling up the oceans and then moving to land.
19) ___ was a naturalist (scientist who studies nature) who sailed around the world on the ship
HMS Beagle, and discovered the theory of Natural Selection.
20) Almost all organisms have to struggle to stay alive. They have to deal with competition for
resources, changes in their environment, and disease. Many also have to deal with other
organisms trying to eat them. This is called ___.
22) Darwin studied nature all over the world. But he is most famous for his discoveries on the
___ Islands, where he studies finches.
24) The first stage of Darwin's theory of Natural Selection requires that a species produce many
offspring. This first step gives you a better chance at surviving, and is called ___.
25) ___ is when all the members of the same species die out. For eample… when dinosaurs
all died because of an asteriod that hit the Earth 65 million years ago.
27) Even though member of a species look a little different from each other, they can still reproduce.
But if some members get isolated from the others, they might continue to change so much that,
if they are ever reunited, they might not be able to reproduce with each other any more. When this
happens, a new species is formed. This process of isolation is known as ___.
29) Scientists often compare the anatomy of humans and other mammals, to show how similar they
are. Scientists can also look at ___ , which shows that humans share 99% of their genetic code
with apes, 96% with horses, and even 75%+ with reptiles and birds = we're all related.