Why Do Big Waves Knock You Over
Interactive passage with audio narration, comprehension questions, and printable PDF.
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About this printable Why Do Big Waves Knock You Over science reading passage, NGSS-aligned (Grades 3-5)
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Why Do Big Waves Knock You Over

Children having fun in ocean waves on a sunny summer beach day.Image credit by Julia Kuzenkov / Pexels.
A wave is a disturbance that travels through water, air, or other materials. All waves carry energy from one place to another. Energy is the ability to make things move or change. When a wave reaches you, it transfers its energy to your body.
The amplitude of a wave is its height from the middle to the top. Amplitude tells us how much energy a wave carries. A wave with high amplitude carries more energy than a wave with low amplitude. This is why a tall ocean wave can push you with great force, while a tiny ripple barely touches you.
When you stand in the ocean and a large wave hits you, the energy in that wave pushes against your body. If the wave carries enough energy, it can knock you off balance or even knock you down. The taller the wave, the more energy it has, and the stronger it pushes. Think of it like this: a gentle tap on your shoulder uses little energy and doesn't move you much. But a strong push uses more energy and can make you stumble.
Small waves, like ripples from a pebble dropped in a pond, have low amplitude. They carry very little energy, so they can't move objects much. Large waves, like those created by strong winds or storms, have high amplitude. They carry lots of energy and can move heavy objects, including people. Understanding wave amplitude helps us stay safe at the beach and explains how waves do work in our world.
Comprehension quiz (8 questions)
1. What does a wave carry?
2. What is wave amplitude?
3. Why can big waves knock you over?
4. What happens when a wave reaches you?
5. Which wave carries more energy?
6. What creates large waves with high amplitude?
7. Small ripples carry very little energy.
8. Energy is the ability to:
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