WorksheetsGeologic Time & History of the Earth
Total questions: 35
Worksheet time: 26mins
The Earth is estimated to be _____ years old
4.6 million
4.6 billion
46 million
46 billion
Which time period is the most recent?
Mesozoic
Cenozoic
Paleozoic
Which Era was dominated by dinosaurs?
Paleozoic
Mesozoic
Cenozoic
Cambrian
What type of event usually marks the end of an Era
A Mass Extinction
A Quinceanera
An earthquake
Evolution of a species
Which era began with the early invertebrates, such as trilobites and brachiopods.
Paleozoic
Mesozoic
Cenozoic
early vertebrate fish began to develop in the
Paleozoic era
Mesozoic era
Cenozoic era
The earliest span of time in Earth history is called...
Precambrian time
Phanerozoic time
Homeroom
Cenozoic time
The first bird appeared in this period
Cambrian period
Jurassic period
Triassic period
Quaternary period
What type of organism eventually put oxygen into the atmosphere?
plants
photosynthetic cyanobacteria
algae
trees
The first supercontinent was
Rodinia
Pangaea
Middle Earth
Westeros
Which of these is not a type of gas found in Earth's early atmosphere?
hydrogen cyanide
hydrogen sulfide
carbon dioxide
oxygen
What caused the mass extinction at the end of the Mesozoic Era?
Asteroid collision with Earth
Volcanic eruptions
Ice Age
Presence of oxygen in atmosphere
When did flowering plants (angiosperms) first appear?
Cretaceous
Devonian
Triassic
Quaternary
During what period did our fossil fuels first start to form?
Silurian
Ordovician
Carboniferous
Triassic
Which of these did NOT appear during the Cambrian explosion?
Jellyfish
Trilobites
Worms
Amphibians
What were the first land plants?
Moss & ferns
Algae
Gymnosperms
Angiosperms
When did Pangaea form?
End of Permian / Start of Triassic period
Start of Jurassic period
Start of Cambrian period
Start of Tertiary period
What was the name of one of the first birds?
Archaeopteryx
Placodermata
Paleoloxodon
Coelocantha
The last ice age was 11,000 years ago - this led to the extinction of all of the following except
wooly mammoths
saber-toothed cats
giant bears
megalodon
Oxygen became abundant in Earth's atmosphere 3.8 bya during the
Proterozoic Eon
Archaen Eon
Hadean Eon
Mesozoic Era
The fossil record shows that horseshoe crabs have existed with very little change for about 1 billion years. Would horseshoe crabs be useful as an index fossil?
Yes, because they were around for a very long time
No, because horseshoe crabs can never be used as index fossils
No, because they were around for TOO LARGE of an amount of time
Yes, because horseshoe crabs can always be used as index fossils
The age of a rock compared to the ages of other rocks is the rock's (a)
The amount of time it takes for 50% of the remaining radioactive material to decay into stable material is called: (a)
The time required for half of the parent isotope to decay into daughter isotopes.
Absolute Age
Relative Age
Fossil
Half-life
Represent species that existed on Earth for a short length of time, were abundant and inhabited many locations.
Rocks
Radioactive Decay
Index Fossils
Half-Life
According to the graph, what is the half-life of this isotope?
100 years
150 years
200 years
300 years
Carbon14 has a half-life of 5,730 years and a dating range of 500-500,000 years. Would we be able to use this isotope to assign an absolute age to a dinosaur fossil?
No
Yes
Maybe
According to the chart, which of these would be most likely used to date the age of the Earth (select all that apply)
potassium-40
rubidium-87
uranium-238
carbon-14
