Question

1. tsunamis are so destructive because:

they have short wavelengths.
they originate in shallow water.
they are deep water waves.
they travel slowly.
they carry a lot of energy.
question 13
2 pts

1. a standing wave:

acts like a wind wave.
is the most common type of ocean wave.
forms in closed bodies of water.
progresses in a forward direction.
is generated by surface tension.

Explanation:

Question 12

To determine why tsunamis are destructive, we analyze each option:

• "they have short wavelengths": Tsunamis actually have very long wavelengths, so this is incorrect.
• "they originate in shallow water": Tsunamis typically originate in deep water (e.g., from underwater earthquakes), so this is incorrect.
• "they are deep water waves": While they start in deep water, their destructiveness is not due to being deep - water waves per se.
• "they travel slowly": Tsunamis can travel at high speeds (e.g., hundreds of kilometers per hour in deep water), so this is incorrect.
• "they carry a lot of energy": Tsunamis are large - scale waves that transfer a huge amount of energy, which is what makes them so destructive when they reach shore.

To determine the correct description of a standing wave:

• "acts like a wind wave": Wind waves are progressive waves, while standing waves have a different behavior (points of no movement - nodes - and maximum movement - antinodes), so this is incorrect.
• "is the most common type of ocean wave": Wind - generated waves are the most common ocean waves, not standing waves, so this is incorrect.
• "forms in closed bodies of water": Standing waves often form in enclosed or semi - enclosed bodies of water (like harbors or lakes) where waves reflect and interfere to form standing patterns, so this is correct.
• "progresses in a forward direction": Standing waves do not progress forward; they oscillate in place, so this is incorrect.
• "is generated by surface tension": Surface tension generates capillary waves, not standing waves, so this is incorrect.

Answer:

they carry a lot of energy.

Question 13