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Home Science

Earth's Interior and Seismic Waves

In Class 11 Home Science, this Earth Science Foundations topic introduces students to the layered structure of Earth, including the crust, mantle, and core, and explains how scientists use seismic waves to study regions deep below the surface. Students learn the basic differences between primary and secondary waves, how waves travel through materials, and how their speed and direction provide clues about Earth’s interior. The topic also connects these ideas with earthquakes and interpreting scientific evidence.

Easy · Level 1 · 3 questions

TOPIC PRACTICE

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3 questions

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  1. Compression and rarefaction
  2. Only transverse displacement
  3. Only rotational motion
  4. Only surface-wave motion
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  1. S waves not passing through the outer core
  2. P waves being restricted only to Earth's surface
  3. Earthquakes occurring only in oceans
  4. Earth's temperature being the same at all depths
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  1. Due to refraction
  2. Due to reflection
  3. Due to diffraction
  4. Due to resonance

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