3. Bacteria that can detect magnetic fields are called magnetotactic bacteria. They contain particles, such as magnetite, that are affected by magnetic fields. These particles form short chains in the bacteria that line up along magnetic fields, similar to the way a compass needle aligns with Earth's magnetic field. Scientists can use fossils of these bacteria to study what Earth's magnetic field was like in the past. Rocks that formed from cooling lava also contain clues about the history of Earth's magnetic field. Which of the following statements are true? Select all that apply. A. Rocks that contain iron are affected by Earth's magnetic field. B. The magnetic fields of magnetic materials in molten rock align with Earth's magnetic field. C. When the poles reverse, the magnetic fields in both fossilized and molten rock reverse. D. Rocks contain a record of Earth's changing magnetic field.

3. Bacteria that can detect magnetic fields are called magnetotactic bacteria. They contain particles, such as magnetite, that are affected by magnetic fields. These particles form short chains in the bacteria that line up along magnetic fields, similar to the way a compass needle aligns with Earth's magnetic field. Scientists can use fossils of these bacteria to study what Earth's magnetic field was like in the past. Rocks that formed from cooling lava also contain clues about the history of Earth's magnetic field. Which of the following statements are true? Select all that apply. A. Rocks that contain iron are affected by Earth's magnetic field. B. The magnetic fields of magnetic materials in molten rock align with Earth's magnetic field. C. When the poles reverse, the magnetic fields in both fossilized and molten rock reverse. D. Rocks contain a record of Earth's changing magnetic field.

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Concept explainers

Magnetic Field Of Coaxial Cable

The word coaxial means same axis. So for a long straight cable to be coaxial, it must have concentric cylindrical shaped conductor around it. Coaxial cable (popularly called ‘coax’) has various applications ranging from current conductors to radiofrequency signal transmitters. This cable has lower emission losses and provides protection from electromagnetic interference which allows signals with less power to transmit over longer distances.For example, currents produced in the pickup of a stereo turntable generally travel to the amplifier through a coaxial cable.The self-inductance of a coaxial cable is another important characteristic, because it influences the propagation of electrical signals in the cable.

Question

3. Bacteria that can detect magnetic fields are called magnetotactic bacteria. They
contain particles, such as magnetite, that are affected by magnetic fields. These
particles form short chains in the bacteria that line up along magnetic fields, similar
to the way a compass needle aligns with Earth's magnetic field. Scientists can use
fossils of these bacteria to study what Earth's magnetic field was like in the past.
Rocks that formed from cooling lava also contain clues about the history of Earth's
magnetic field. Which of the following statements are true? Select all that apply.
A. Rocks that contain iron are affected by Earth's magnetic field.
B. The magnetic fields of magnetic materials in molten rock align
with Earth's magnetic field.
C. When the poles reverse, the magnetic fields in both fossilized
and molten rock reverse.
D. Rocks contain a record of Earth's changing magnetic field.

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