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WorksheetsPaleobiosphere Unit
Total questions: 33
Worksheet time: 17mins
Earth elements decay and change into another element in a process called_____________.
radiation
isotope
radioactive decay
half-life
The __________of rocks is the numerical age and real age of rocks.
relative age
half-life
absolute age
earth age
The heat beneath Pangaea caused the continent to expand.
True
False
The Mid-Atlantic Ridge, formed by the breakup of Pangaea, has been dormant since the late Mesozoic
True
False
Oil deposits overlain by evaporate deposits rarely leak to the surface.
True
False
Which of the following are the roles of DNA
Store genetic information
Lower energy needed for reactions to take place
Expression of traits and characteristics
Copying and acting as a template
The emission of radioactive particles by isotopes as they change into other elements over time is known as dendrochronology.
True
False
Which statement about the species of animals and plants that lived on Earth in the past is best supported by the fossil record?
most appeared during the Cambrian period
most became extinct
most were preserved in metamorphic rock
most lived on land
Which of the following are examples of eons?
Phanerozoic
Cenezoic
Paleozoic
Proterozoic
____________ have been found in waters of hydrothermal vents.
Enzymes
Fungus
Viruses
Amino Acids
Natural selection could not occur without
stable environments
genetic variation in species
gradual warming of the Earth
competition for unlimited resources
which fossil formation happens when an insect gets trapped in sticky tree sap. The tree sap hardens and turns into this substance, which preserves the organism that was trapped inside?
cast
amber
mold
petrified
Which type of fossil is formed when things such as mud, sand, or minerals fill in the spaces of a mold. This fossil has the exact smae shape as the orginal organism?
petrified
imprint
cast
mold
An example of a fossil with altered hard parts includes
a mummified human body
petrified wood.
a saber-toothed cat in tar.
a gastrolith.
Select 2 answers. What does the fossil record tell us?
geological events
changing life forms
age of the Earth
Moom composition
Carbonate sediments tend to accumulate in deep water as the calcium carbonate shells of organisms fall to the seafloor
True
False
The first organisms to live on Earth were Dinosaurs.
True
False
Based on interpretations of the rock record, geologist have divided Earth's history into units that represent specific amounts of time.
Geologic time scale
time scale
principle of superposition
geoloical law
What represents the greatest expanses of time?
eons
eras
periods
epochs
Eons are divided into
epochs
eras
periods
eons
Each era is subdivided into
eons
eras
epochs
periods
Periods are divided into smaller units called
epochs
eras
periods
eons
What are the three eras within the phanerozoic eon?
Paleozoic
mesozoic
cenozoic
hectozoic
Which era means ancient life?
mesozoic
palezoic
cenozoic
hectozoic
What era means middle life?
ancient times
mesozoic
cenozoic
paleozoic
Which era means recent life?
cenozoic
mesozoic
paleozoic
hectozoic
The Precambrian is the oldest part of the geologic time scale
True
False
Which era lasted 88% of earth's past?
precambrian
paleozoic
mesozoic
cenozoic
Scientists think that Earth and meteorites are about the same age because they hypothesize that the solar system formed all at once.
True
False
An essential characteristic of life is
Ability to breathe
Ability to reproduce
Ability to move
Ability to eat
____________ may have been the first self-replicating molecules on Earth.
RNA
Viruses
Amino Acids
Enyzymes
How did the mesozoic era end?
flood
new mammals arrived on earth
mass extinction
people evolved
Sites where life may have originated
Mountains
Hydrothermal Vents
Rain Forests
Trenches
