Based on your inquiries regarding Primary (P) and Secondary (S) waves, here are the true statements:
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Primary waves can move through liquids, solids, and gasses. (True)
- P-waves are compressional waves that can travel through all three states of matter: solids, liquids, and gases.
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Secondary waves can travel through solids only. (True)
- S-waves are shear waves that can only travel through solids and cannot propagate through liquids or gases.
The remaining statements are:
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Primary waves travel to fewer places on Earth's surface. (False)
- P-waves can travel through more mediums than S-waves, allowing them to reach more places on Earth's surface.
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Secondary waves are faster than Primary waves. (False)
- P-waves travel faster than S-waves, which is why they are the first to be detected by seismographs during an earthquake.
In summary, the true statements are that primary waves can move through liquids, solids, and gases, and secondary waves can travel through solids only.