Read: The Sound Around Us (EX.HW: KIET)

Read article on The Sound Around Us, then complete the questions below. Fill in each blank with the correct word or phrase. 1. Sound is a type of energy that travels in waves through matter, such as airor water.2. Sounds are made when there is a movement that creates a vibrationof the air molecules. As the molecules vibrate, they knock intothe next molecules and cause them to vibrate.3. Pitch describes how highor lowa sound is.4. A fast-moving sound wave makes a highpitch. A low pitch is made by sound waves moving slowly.5. Volume describes how loudor quieta sound is.6. Bigger sound waves make loudsounds. Smaller sound waves make quietsounds.7. Sound only happens when it has moleculesto move. There is no sound in spacebecause there are no air molecules there.8. A sonic boomhappens when the sound waves made by a jet all crash into each other because the jet is moving fasterthan they are.