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Life Science, Tuesday Opener, 2.26.19

Total questions: 10

Worksheet time: 20mins

Name
Class
Date
1.
At the end of the Mesozoic Era there was a mass extinction.  Which of the following is attributed as being the main cause?
a)
asteroid or comet impact
b)
major volcanic eruption
c)
earthquakes
d)
climatic changes
2.
What is a mass extinction?
a)
When all the species in a particular area on earth suddenly go extinct
b)
When multiple species from all over the earth suddenly go extinct 
c)
When one species goes extinct due to habitat changes
d)
When all life on earth is wiped out 
3.

Which extinction is considered the largest mass extinction in Earth's history? Basically 96% of all species on Earth disappeared.

a)

Ordovician Extinction

b)

Devonian Extinction

c)

Permian Extinction

d)

Triassic Extinction

e)

Cretaceous Extinction

4.

This mass extinction occurred when there was massive volcanic activity that was thought to have occurred because of an asteroid that hit Earth.

a)

Ordovician Extinction

b)

Devonian Extinction

c)

Permian Extinction

d)

Triassic Extinction

e)

Cretaceous Extinction

5.

Which mass extinction included the extinction of the dinosaurs?

a)

Ordovician Extinction

b)

Devonian Extinction

c)

Permian Extinction

d)

Triassic Extinction

e)

Cretaceous Extinction

6.
 Which is LEAST LIKELY to push a species toward extinction?  
         
a)
a.   Cutting down entire forest 
b)
b.  Putting animals in a zoo 
c)
 c.   Polluting mountain streams 
d)
d.   Introducing new species to an ecosystem with no known natural predator    
7.
Humans are causing extiction in which ways?
a)
By over hunting animals for food or products.
b)
By destroying the natural habitat of species.
c)
By polluting the environments of the world.
d)
All of the above.
8.
Which of the following was a natural factor that caused extinctions? 
a)
Over harvesting
b)
Changes in the oxygen levels
c)
Pollution
d)
Habitat destruction
9.

Permian-triassic Extinction:

a)

Small marine organisms died out. (440 mya)

b)

Many tropical marine species went extinct. (365 mya)

c)

The largest mass extinction event in Earth's history affected a range of species, including many vertebrates. (250 mya)

d)

The extinction of other vertebrate species on land allowed dinosaurs to flourish. (210 mya)

e)

wiped out nonavian dinosaurs (65.5 mya) (AKA K-T extinction event)

10.

Cretaceous-tertiary Extinction:

a)

Small marine organisms died out. (440 mya)

b)

Many tropical marine species went extinct. (365 mya)

c)

The largest mass extinction event in Earth's history affected a range of species, including many vertebrates. (250 mya)

d)

The extinction of other vertebrate species on land allowed dinosaurs to flourish. (210 mya)

e)

wiped out nonavian dinosaurs (65.5 mya) (AKA K-T extinction event)

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