Transcript Geo Vocab Puzzle

Class # ___: Geologic Time Scale
Puzzle
Word Bank
endoskeleton
plate
cyanobacteria
amphibians
reptiles
extinction
Pangaea
gymnosperm
angiosperms
mammal
marsupial
Geologic time scale
Radiometric testing
stratigraphy
era
period
epoch
trilobite
fossil
exoskeleton
Name _________________________ Core 1 2 3 4
Across
1.plant having its seeds enclosed in an ovary; a flowering plant
3.method of dating geological or archeological specimens by determining
the relative proportions of particular radioactive isotopes present in a
sample.
7.subdivision of a period
10.is a system of chronological measurement that relates stratigraphy to
time, and is used to describe the timing and relationships between events
that have occurred throughout Earth’s history.
13.extinct marine arthropod that occurred abundantly during the Paleozoic
era, with a carapace over the forepart, and a segmented hind part divided
longitudinally into three lobes.
14. blue-green algae a group of photosynthetic bacteria which release
oxygen into the atmosphere
15. a cold-blooded vertebrate of a class that includes snakes, lizards,
crocodiles, turtles, and tortoises. They are distinguished by having a dry
scaly skin, and typically laying soft-shelled eggs on land.
16. a long and distinct period of history with a particular feature or
characteristic; several hundred million years
18. external skeleton
19. a cold-blooded vertebrate animal that has an aquatic gill-breathing
larval stage followed by a terrestrial lung-breathing adult stage. Egg layers
in water.
Down
2. The study of rock layers (strata), especially the distribution,
deposition, and age of sedimentary rocks.
4. plant, such as a pine tree, whose seeds are not enclosed within an
ovary, fruit.
5. ____________ tectonics = a theory explaining the structure of the
earth's crust and many associated phenomena resulting from
lithospheric plates that move over the underlying mantle.
6. the remains or impression of a prehistoric organism preserved in
petrified form or as a mold or cast in rock.
7. internal skeleton 8. mammal whose members are born
incompletely developed and are typically carried and suckled in a
pouch on the mother's belly.
9. a continent which included all the landmass of the earth prior to
the Triassic period
11. state or process of a species becoming extinct, no longer existing
on the Earth.
12. warm-blooded vertebrate animal of a class that is distinguished
by the possession of hair or fur, the secretion of milk by females for
the nourishment of the young, and the birth of live young.
17. subdivision of an era