Mass extinction has happened many times in Earth's history. Some of the things that are hyposthesized...
Mass extinction has happened many times in Earth's history. Some of the things that are hyposthesized to have contributed to these periods of mass extinction are"
a. Impacts
b. periods of extreme volcanism
c. climate change
d. magnetic field flip
Homework Answers
Answer- a.impact and c.climate change. There are many reason behind mass extinction which is discovered and hypothesized, but among them the main reason which gave rise to major mass extinction along the permian-triassic boundary and Cretaceous-tertiary boundary are climate change and impacts.
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Mass extinction has happened many times in Earth's history. Some
of the things that are hyposthesized...
Question 64. Earth has experienced five previous mass extinction events Many ecologists now believe we are...
Question 64. Earth has experienced five previous mass extinction events Many ecologists now believe we are experiencing a sixth mass extinction. How does this current mass extinction differ from previous extinction events? The background extinction rate now is much higher now than in previous a. extinction events b. The background rate of extinction is higher now than the rate of biodiversity so the current extinction event is more pronounced than previous ones. There are no differences in the previous and...
Which statements about global climate change are scientific statements supported by evidence? A) All things must...
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1. What did Alfred Wegener's 1912 theory primarily describe? a. Ring of Fire b. Continental Drift...
1. What did Alfred Wegener's 1912 theory primarily describe?
a. Ring of Fire b. Continental Drift c. Plate Tectonics
d.Convection Currents
2. What factor is primarily responsible for the variation in
distinct life zones encountered as you ascend up a mountain?
a. Changes in Albedo b. Changes in Rock Type c. Changes in
Temperature d. Changes in Pressure
3. The magnetic poles have reversed many times in Earth's
history.
a. True b. False
4. A distinct correlation can be made...
An alpha-particle has a charge of +2e and a mass of 6.64 times 10^-27 kg. It...
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A. An α-particle has a charge of +2e and a mass of 6.64 × 10-27 kg....
A. An α-particle has a charge of +2e and a mass of 6.64
× 10-27 kg. It is accelerated from rest through a
potential difference that has a value of 1.67 × 106 V
and then enters a uniform magnetic field whose magnitude is 2.49 T.
The α-particle moves perpendicular to the magnetic field at all
times. What is (a) the speed of the α-particle,
(b) the magnitude of the magnetic force on it, and
(c) the radius of its...
Please answer all the questions not partly Q. 1 The number of species on the planet...
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Question 64. Earth has experienced five previous mass extinction events Many ecologists now believe we are experiencing a sixth mass extinction. How does this current mass extinction differ from previous extinction events? The background extinction rate now is much higher now than in previous a. extinction events b. The background rate of extinction is higher now than the rate of biodiversity so the current extinction event is more pronounced than previous ones. There are no differences in the previous and...
1. What did Alfred Wegener's 1912 theory primarily describe?
a. Ring of Fire b. Continental Drift c. Plate Tectonics
d.Convection Currents
2. What factor is primarily responsible for the variation in
distinct life zones encountered as you ascend up a mountain?
a. Changes in Albedo b. Changes in Rock Type c. Changes in
Temperature d. Changes in Pressure
3. The magnetic poles have reversed many times in Earth's
history.
a. True b. False
4. A distinct correlation can be made...
An alpha-particle has a charge of +2e and a mass of 6.64 times 10^-27 kg. It is accelerated from rest through a potential difference that has a value of 1.24 times 10^6 v and then enters a uniform magnetic field whose magnitude is 3.30 T. The alpha-particle moves perpendicular to the magnetic field at all times. (a) What is the speed of the alpha-particle? m/s (b) What is the magnitude of the magnetic force on it? N (c) What is...
EXERCISE 18.6 How Quickly Can Humans Hunt a Species to Extinction? Name: Course: Section: Date: The moa, a giant flightless bird, was hunted to extinction on New Zealand in the early 1400s. The human population of New Zealand was no more than 2,500 at the time when the moa went extinct. We can make some simplified calculations to see how many moas were hunted per year (a) Humans first settled New Zealand and began hunting moas in 1314. The last...
Tethers are long dangling wires that use the velocity of a spacecraft through the Earth's magnetic field to generate electrical power. Alternatively, electrical currents pushed through the tether might be used to change the spacecraft velocity for either propulsion or for braking and reentry. Several 'space tether experiments have been flown to investigate the possible use if Faraday's law for power generation and/or propulsion. Examples are the 1996 joint US/Italy effort to deploy a 20 km tether from one of...
A. An α-particle has a charge of +2e and a mass of 6.64
× 10-27 kg. It is accelerated from rest through a
potential difference that has a value of 1.67 × 106 V
and then enters a uniform magnetic field whose magnitude is 2.49 T.
The α-particle moves perpendicular to the magnetic field at all
times. What is (a) the speed of the α-particle,
(b) the magnitude of the magnetic force on it, and
(c) the radius of its...
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