Content Outline for Teaching - Potosi School District - Home
Content Outline for Teaching - Potosi School District - Home
Content Outline for Teaching - Potosi School District - Home
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8<br />
<strong>Content</strong> <strong>Outline</strong><br />
<strong>for</strong> <strong>Teaching</strong><br />
Waves<br />
Underlined words and<br />
phrases are to be filled<br />
in by students on the<br />
Note-taking Worksheet.<br />
Section 1<br />
What are waves?<br />
A. Rhythmic disturbances that carry energy without carrying matter are called<br />
waves.<br />
B. Molecules transport wave energy without themselves moving, like a line of people<br />
passing a ball.<br />
C. Mechanical waves use matter to transfer energy.<br />
1. Transverse wave—wave energy causes matter in the medium to move up and<br />
down or back and <strong>for</strong>th at right angles to the wave.<br />
2. Compressional wave—matter in the medium moves <strong>for</strong>ward and backward<br />
in same direction as the wave.<br />
D. Sound waves—compressional waves caused by colliding air molecules<br />
E. Electromagnetic waves—transfer energy without using matter; the Sun emits<br />
electromagnetic waves that travel through space to Earth.<br />
Discussion Question<br />
What is the difference between a mechanical wave and an electromagnetic wave?<br />
Mechanical waves use matter to transfer energy; electromagnetic waves use electrically<br />
charged particles to carry energy.<br />
Waves 23
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