PHYSICAL SCIENCE UNIT F
Energy in Motion
Chapter One- Forces and Motion
Vocabulary Words
Force-push or a pull that can make something move
Wind-moving air
Gravity-force that pulls things toward the center of Earth
Magnet-piece of iron or steel that attracts, or pulls, other objects made of iron and steel
Motion-act of moving
Chapter Review
1. A force is a push or a pull. Wind, moving water, gravity, and magnets all cause pushes and pulls.
2. You can use forces to change the location of things and the direction in which things move and to make things stop moving.
3. An N pole and an S pole attract each other; two N poles or two S poles repel each other.
4. Magnets are used to hold things to surfaces; they are used in things such as telephones, doorbells, televisions, and compasses.
5. Forces make people and things move. It takes less force to move something light than something heavy. It takes less force to move something on a smooth surface than on a rough surface. It takes less force to move something a short distance than a long distance.
6. You can measure how far something or someone moves. You can measure how long something takes to move from one place to another. You can measure how much force it takes to move something.
UNIT F
Chapter Two- Hearing Sound
Vocabulary Words
Sound-kind of energy that can be heard
Vibrate-move back and forth
Loudness-how loud or soft a sound is
Pitch-how high or low a sound it
Sonar-way to use sounds to locate objects under water, dolphins and whales use this
Music-combination or sequence of sounds that people enjoy listening to
Audiologist-a doctor that tests your hearing
Chapter Review
1. Sound is made when things vibrate.
2. Sound vibrations move through the air into your ears and make the eardrums vibrate.
3.Sounds can be loud or soft, high or low.
4. Sounds travel by sending vibrations through matter.
5. Sounds can travel through different kinds of matter. They travel through gases, solids, and liquids.
6. You can make high sounds by making an object vibrate faster. You can make low sounds by making it vibrate more slowly. For example, shortening a string makes it vibrate faster and sound higher. Making the string longer makes it vibrate more slowly and sound lower. Thin strings vibrate faster and sound higher than thick strings.
7. You use more energy to make loud sound. You use less energy to make soft sounds. For example, hitting a drum hard makes a loud sound. Hitting it lightly makes a soft sound.
8. Your vocal cords vibrate when you speak.
9. Loud noises can harm your hearing.
10. Your eardrums vibrate when you hear.
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