Have an account?
Skip to Content
Build your own quiz
Suggestions for you
Science
7th
grade
HMH Mod D, Unit 1, Lesson 2 Patterns of Change in Life on Earth
26 questions
Show Answers
See Preview
- 1. Multiple Choice
What is needed for a fossil to form? Choose 2.
The organism must first get stuck in rock.
The soft tissue of the dead organism must be eaten by scavengers before the bones can be preserved.
The tracks or burrows of an organism must be filled with sediments before they are disturbed.
The organism's body must be covered by sediment or another substance before its body decays.
- 2. Multiple Choice
Scientists used radiometric dating which measured how much _______________ in the rock had changed to _____________.
potassium/argon
salt/pepper
blood/tissue
sediment/rock
- 3. Multiple Choice
The earliest organisms were about _____________ years old.
500 million
centuries
3.8 billion
1 bazillion
- 4. Multiple Choice
The earliest organisms were __________ cells.
complicated
pretty
ugly
single
- 5. Multiple Choice
The evidence of the earliest organisms was not fossils, but ________________________.
pictures of fossils
traces of carbon
cells
protein
- 6. Multiple Choice
Many new types of organisms appeared during the ____________ period.
old
Cambrian
Triassic
Jurassic
- 7. Multiple Choice
The Cambrian explosion happened because of ____________.
increased oxygen levels in the air from a particular bacteria
there was too much dynamite
mass extinction
changes in identifying fossils
- 8. Multiple Choice
Many Cambrian animals had ________ because of predators.
feet
tails
skeletons
hard outer shells
- 9. Multiple Choice
What evidence from the fossil record supports the observation that life changes over time? Choose 2
more fossils of the same species found in several rock layers
increased numbers of fossils of different species found in younger rock layers
several rock layers that do not contain fossils
fossils of distant relatives of a modern species found in ancient rock layers
- 10. Multiple Choice
•More recent fossils have _____ __________ bodies and physical features than older ones.
the same
more complex
land dwelling
older rock
- 11. Multiple Choice
•Scientists infer that while life changes over time on Earth, not all populations change at the_________
top and bottom
layers
same speed
- 12. Multiple Choice
The fossils of organisms with simpler body plans are also found in younger rock layers along with more complex fossils.
True
False
True and false
- 13. Multiple Choice
Put these in the order that they appeared:
A. Amphibians, reptiles and mammals.
B. Fish with jaws.
C. Birds
D. Jawless fish
A,B,C,D
D,C,B,A
D,A,C,B
D,B,A,C
- 14. Multiple Choice
Feet and lungs enabled organisms to live
in the water
in space
on land
- 15. Multiple Choice
Fossils of organisms that have body structures that are found both in an ancestral species and in its descendants are called ...
transitional fossils
ordinary fossils
extraordinary fossils
fancy
- 16. Multiple Choice
A ____________ ___________ happens when whole groups of related species die out at about the same time because of large changes in the environment.
house party
funeral
mass extinction
transitional fossil
- 17. Multiple Choice
The number of new species _______ in time after a mass extinction.
increases
decreases
stays the same
- 18. Multiple Choice
Scientists inferred that the Cretaceous-Paleogene mass extinction was caused by an asteroid hitting the earth. How did they figure this out? Choose 2
They read it in a history book.
There were unusual amounts of a metal called iridium in one rock layer in many different places on earth.
They discovered tiny glass formations.
They made an educated guess.
- 19. Multiple Choice
Why did the meteorite striking the earth cause mass extinction?
The animals ran away.
There were too many rocks.
The impact caused high temperatures.
The fossils said so.
- 20. Multiple Choice
A structure that is present in an organism but no longer serves its original purpose (ex. hip bones in whales)
Vestigial Structure
Isolation
Analogous Structures
- 21. Multiple ChoiceDuring Precambrian Time, simple life forms existed in the oceans of Earth. This was followed, during the Paleozoic Era, by the "great ___________ explosion" when many new life forms appeared on Earth in a very short period of time.BurgessCambrianGeologicJurassic
- 22. Multiple ChoiceWhich of the following is believed to have caused the extinction of dinosaurs?EarthquakeVolcanoes eruptingHurricanes and TyphoonsMeteor Strike
- 23. Multiple ChoiceAn organism is UNLIKELY to be preserved as a fossil if:it has a shellit has a skeletonit is buried quickly after deathit is a soft-bodied creature
- 24. Multiple ChoiceWhat was the "Cambrian Explosion"?When lots of different organisms evolved and thrivedThe time when dinosaurs went extinct.The time when Humans ruled the world.The period when bacteria thrived in our oceans.
- 25. Multiple Choice
Which of these is not a significant discovery that Charles Walcott made in the Burgess Shale?
well-preserved land organisms
soft tissues of organisms preserved in great detail
fossils over 500 million years old
the remains of an ancient ocean
- 26. Multiple Choice
Which of these best describes the tiny leg bones that some whales have, which do not aid in their movement or serve any other function?
structures that grow and improve in function as they are used
structures that will become adaptations when the environment changes
structures that are a remnant of the adaptations that the whale’s ancestors needed to survive on land
structures that function at certain times of the year or under certain conditions
- Answer choicesTagsAnswer choicesTags