Paragraph: (Science-textbook/science-g5-81.txt)
Sent 1: The idea that Earth is a magnet is far from new.
Sent 2: It was first proposed in 1600 by a British physician named William Gilbert.
Sent 3: Knowing it acts like a magnet is one thing.
Sent 4: Knowing why it acts like a magnet is more difficult.
Sent 5: In fact, finding out why is a fairly recent discovery.
Sent 6: To find out why required new technology.
Sent 7: It was the seismograph that made it possible to learn why the Earth acted like a magnet.
Sent 8: Seismograph are used to study earthquakes.
Sent 9: By studying earthquake waves they were able to learn about Earths interior.
Sent 10: They discovered that Earth has an inner and outer core.
Sent 11: The outer core consists of liquid metals, mainly iron and nickel.
Sent 12: Scientists think that Earths magnetic field is generated here.
Sent 13: It is caused by the motion of this liquid metal.
Sent 14: The liquid metal moves as Earth spins on its axis.

Question: Where do scientists think the Earth's magnetic field is generated? (true/0)

Outer core. The outer core consists of liquid metals, mainly iron and nickel. Sent 12: Scientists think that Earths magnetic field is generated here
The idea that Earth is a magnet is far from new
In its outer core
Inner core

Question: When was it first suggested that Earth was a magnet? (true/1)

1890
Recent discovery
In 1600

Question: What technology made it possible to test the Earth's magnetic properties? How were scientist able to use this machine to study this phenomenon? (true/2)

Earth has an inner and outer core. The outer core consists of liquid metals, mainly iron and nickel. Scientists think that Earths magnetic field is generated here
Tomograph, analized infrared images
Seismograph, studied earthquake waves
Seismograph, Seismograph are used to study earthquakes. Sent 9: By studying earthquake waves they were able to learn about Earths interior
It was the seismograph that made it possible to learn why the Earth acted like a magnet. Seismograph are used to study earthquakes. By studying earthquake waves they were able to learn about Earths interior

Question: Why was William Gilbert unable to explain prove theory that the Earth acts like a magnet in 1600? (true/3)

Knowing it acts like a magnet is one thing. Sent 4: Knowing why it acts like a magnet is more difficult. To find out why required new technology
There was no appropriate technology
Gilbert could not prove his theory because seismograph technology required see the Earth's interior was not yet developed
Humanity was not ready to accept his explanation
Seismograph are used to study earthquakes

Question: How does the liquid metal within the Earth's core generate a magnetic field? (true/4)

It is caused by the motion of this liquid metal
By nuclear reacations
They discovered that Earth has an inner and outer core
The liquid metal in the outer core moves as the Earth spins generating a magnetic field
It moves

Question: How did they learn why the Earth acts like a magnet? (true/5)

A seismograph made it possible to learn why the Earth acted like a magnet because by studying earthquake waves they were able to learn about Earth's interior
The idea that Earth is a magnet
By studying earthquake waves they were able to learn about Earths interior
By analyzing earthquake waves
By analyzing Earth core images

Question: What technology allowed scientists to determine why the earth acts like a magnet? (false/6)

Liquid metals
Seismograph
Tomograph

Question: What do we know and don't about the Earth and magnets? (false/7)

There are always unanswered questions
By studying earthquake waves they were able to learn about Earths interior
Earth is a magnet and why it acts like a magnet is more difficult
We know it acts like a magnet but not why it acts like a magnet
Everything

Question: How is the magnetic field generated? (true/8)

By nuclear reactions in Earth inner core
Earth's magnetic field is generated in the outer core by the motion of this liquid metal
It is caused by the motion of this liquid metal
Earth spins on its axis

Question: When the Earth spins, what are the main liquid metals it is causing to move? (true/9)

Magnet
Iron and nikel
Iron and nickel
Steel and bronze

Question: What are the major parts of the Earths core and how do they differ? (false/10)

Nucleus and membrane
Earth has an inner and outer core.The outer core consists of liquid metals, mainly iron and nickel
The major parts of Earth's core are the inner or solid metal core and outer liquid metal core
Inner and outer core
The liquid metal moves as Earth spins on its axis

Question: Were seismographs available in 1600? (false/11)

No
Yes
No, finding out why is a fairly recent discovery

Question: What do scientists think to be the immediate cause of how Earth's magnetic field is generated? Choose the relevant options (false/12)

Motion of liquid metals
They discovered that Earth has an inner and outer core
They think the magnetic field is generated by the motion of the liquid metal in the Earth's outer core
Studying earthquake waves they were able to learn about Earths interior
Gravitational waves

Question: Does the earth have magnetic properties? If so when was this idea proposed? (true/13)

Yes, in 1600
Yes,1890
The idea that Earth is a magnet is far from new. Sent 2: It was first proposed in 1600
Knowing why it acts like a magnet is more difficult
The idea that Earth is a magnet is far from new. It was first proposed in 1600 by a British physician named William Gilbert

Question: Where do scientists think the earth's magnetic field is generated? (false/14)

The outer core that consists of liquid metals, mainly iron and nickel
Inner core
Earths interior
The outer core

Question: How does Earth create its magnetism? (true/15)

It is caused by the motion of liquid metal
Earth has an inner and outer core. consists of liquid metals, mainly iron and nickel.Earths magnetic field is generated here
They discovered that Earth has an inner and outer core. The outer core consists of liquid metals, mainly iron and nickel. Scientists think that Earths magnetic field is generated here
It is caused by gravitational waves
Seismograph are used to study earthquakes

Question: What did William Gilbert first speculate in 1600? (true/16)

That Earth is billion years old
That Earth has magnetic field
The idea that Earth is a magnet is new
Seismograph are used to study earthquakes

Last updated: Mon Apr 16 04:55:33 EDT 2018
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