1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
bekas [8.4K]
3 years ago
7

Scientists talk about the 6th Mass extinction happening right now. What is it and how is it different from the last 5?

Biology
1 answer:
tankabanditka [31]3 years ago
4 0

Answer:

The 6th Mass Extinction is the current mass extinction event of the Holocene era.

The 6th extinction differs with the last five in terms of the cause. The last 5 extinction events all had natural causes, with species killed either by climate change or by natural disasters such as volcanic eruptions.

Explanation:

Before we elaborate the 6th extinction, it is important to understand the meaning of mass extinction and why it takes place.

Mass Extinction:

<em>A mass extinction is a time period in which a large number of living species go extinct. </em>

The Earth has gone through 5 major extinction events. Lets analyse how their cause differs from the 6th extinction.

  • The first extinction occurred in the The Ordovician Period of the Paleozoic Era (about 440 million years ago). The major cause of this event was continental drift and the climate change that followed. This extinction took place in 2 stages: an ice age that covered the Earth and the rising sea levels when the ice age ended.
  • The second one occurred in The Devonian Period of the Paleozoic Era (about 375 million years ago). Many climatic changes are suspected to be causes of this event: Lack of oxygen in the oceans, quick cooling of air temperatures, volcanic eruptions, and meteor strikes.
  • The third event took place in The Permian Period of the Paleozoic Era (about 250 million years ago). Asteroid strikes, volcanic activity and climate change are suspected to be the causes.
  • The fourth extinction occurred at the end of the Triassic Period of the Mesozoic Era (about 200 million years ago). Volcanic activity, rising pH and salt concentrations in the oceans and climate change are said to be the primary causes.
  • The fifth extinction occurred at the end of the Cretaceous Period of the Mesozoic Era (about 65 million years ago). Asteroid strikes or meteor showers are said to be the causes.
  • The 6th extinction, occurring in the Holocene era, is believed to caused solely by human activities and the consequent climate change.
You might be interested in
Science under modern classification systems, in what clade will you find birds?
MrMuchimi
According to modern systems of classification, birds are descendants of T<span>heropoda dinosaurs. These dinosaurs are called Paraves. From this clade, a node is made during the evolution. The new clade is called Aves. This is where birds are classified.</span>
4 0
3 years ago
Read 2 more answers
1. How would you design a test<br> to determine if the ebony color is<br> dominant over the yellow?
Georgia [21]

Answer:

How would you design a test  to determine if the ebony color is  dominant over the yellow?

Initial parents must be crossed before the issue of dominance could be resolved, the phenotype determines whether ebony color is dominant over yellow color

Explanation:

7 0
3 years ago
What does photosynthesis provide?
il63 [147K]
Oxygen, look at chemical reaction on the pic

5 0
3 years ago
What is the difference between cardiac and skeletal muscle cells?
tigry1 [53]

Answer:

-The skeletal muscle has long and cylindrical cells. The cardiac muscle cells are short and together they form a branch.

-The heart muscle fibers have only one nucleus in the center. The skeletal muscle fibers are multinucleated.

-The skeletal muscle is voluntary and the cardiac is involuntary.

- Sarcoplasma and glycogen are more abundant in the heart muscle.

-The cardiac muscle is longitudinal striated and the skeletal is transverse striated

5 0
3 years ago
What are the stratigraphic principles?
xeze [42]

Answer:

There are 6 of these...

Law of Superposition

The geologic principle that states that in horizontal layers of sedimentary rock, each layer is older than the layer above it and younger than the layer below it.

Principle of Original Horizontality

The geologic principle that states that sediments are deposited as essentially horizontal beds.

Principle of Lateral Continuity

The geologic principle that states that strata originally extended in all directions until it thinned out to zero or ended against the edges of another structure or deposit.

Principle of Cross-cutting Discontinuities

The geologic principle that states that any discontinuity that cuts across a stratum must have formed after that stratum.

Law of Inclusions

The geologic principle that states that any piece of rock that has become included in another rock or body of sediment must be older than the rock or sediment into which it has been incorporated.

Law of Faunal Succession

The geologic principle that states that sedimentary rocks that contain fossils succeed each other in specific and reliable order.

3 0
3 years ago
Other questions:
  • Which individual bone is the most accurate indicator of stature?
    14·1 answer
  • The primary health care provider prescribes cyclophosphamide to a patient with multiple myeloma. which complication should the n
    11·2 answers
  • What would earth be like without the greenhouse effect?
    6·1 answer
  • Please help me with this question!!!!!
    10·2 answers
  • How might the geologist estimate how long it took to deposit the sediment seen in the rock layers?
    12·1 answer
  • During which prices are food molecules broken down to produce chemical potential energy in the form of ATP
    6·1 answer
  • Two kinds of birds eat the same food and nest in the same area these two species of birds are in?​
    12·1 answer
  • Breathing is important to humans in order to​
    12·1 answer
  • How can the environment affect an organism’s traits? Give two examples please!
    14·1 answer
  • Select the clause that best connects a reason to the opinion: I think we should have a big meal tonight___.
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!