1. SCIENCE Light and Sound

5. Light travels in a straight lines . It can go in all directions from its source, but it goes in a straight path in all those directions.

6. Day 1 note 1.Light is a form of energy that travels in straight lines. 2.Light and sound are both forms of energy. 3.Light can move through matter or empty space . 4. Light travels in a straight line.

8. When a mirror reflects light, it reverses the image.

13. EXTRA Interesting fact: Mirages On a hot day, you can sometimes see what looks like a pool of water on the ground – even though the ground is completely dry. In fact, the "pool" is caused by refracted light from the sky. The air close to the ground becomes hotter and, therefore, less dense than the air higher up. This change in density causes light from the sky to be bent upward so that it reaches your eyes from the direction of the ground. The effect is called a MIRAGE and is common on hot roads, in deserts, as well as the sky. Mirages of distant objects on the horizon, such as mountains, may be seen.

19. Light – Day 3: Reflection and Refraction 1.Light waves are straight or bent, depending on the object they come in contact with. 2. Some of the light energy that hits an object is absorbed. *Objects of different color absorb different amounts of light. 3. Dark objects absorb more light energy than light-colored objects.

20. 4. Because dark objects absorb more light energy, light-colored clothes keep you cooler on a bright summer day. 5. Objects don’t absorb all the light that hits them. Some of the light bounces off. This bouncing off of light from a surface is called reflection. 6. Light usually scatters in many directions as it is reflected .

21. 7. The bending of light as it moves from one material to another is called refraction. 8 . A refracted beam of light seems to as it changes directions. 9. White light has all the colors in the rainbow. 10. You can separate white light into colors by using a glass prism. .

22. 11. As white light enters the prism, it’s speed changes. 12. The change in speed causes the light to bend. 13. All the colors in the white light have different wavelengths 14. The different wave lengths of white light are bent at different angles which causes the colors to separate.

25. Light Notes: Day 5 1. Which absorbs more heat - light or dark colors? 2. Black is ALL colors REFLECTED. 3. White is the ABSORPTION of ALL colors. 4. The color of an object is the color that it reflects back for us to see. All of the other colors are absorbed.

32. 4. List 3 examples of transparent objects: 5. List 3 examples of translucent objects: 6. List 3 examples of opaque objects:

41. Our ears detect the sound wave through the ear’s eardrum and some nerves, then send the signals to our brain. Our brain tells us what sound was just heard. Our brain can quickly identify many different sounds.

42. Sound Day 1 Notes (day 7) 1.Sound is a form of energy that travels through the air as waves . 2. Sound is vibration you can hear. 3. The loudness ofsound is called volume. The volume of sound is measured in units called decibels. Sound- energy that travels through matter in waves in high and low pressure. Vibration- A quick back and forth movement of matter

43. waves Click on link 215-41_l.mov Sound waves are the way sound travels. Sound travels in compression waves, similar to the slinky activity. click here Day 8

45. Sound Notes – Day 2 1. Sound travels through the air as compression waves. 2. Sound has to travel through a medium. 3. Sound travels fastest through steel. Sound travels slowest through air. 4. What form of matter is left? Air Vibrations move by traveling from place to place. In air, the sound moves between the air particles, the particles vibrate where they are. This is why you can still hear sounds even though the wind is not blowing.

46. 5.Amplitude is the measure of the amount of energy in a sound wave. Sound Waves – Compression wave that carries energy through matter Loudness – Amount of sound energy

55. Are Pitch and Loudness different?? Why or Why not? Why are some sounds louder than others??? Do You Know???

56. 1.Wavelength is the distance between two compressions (points) of a sound wave. 2. Frequency is measured as the number of vibrations per second . It determines the pitch of a sound. 3. Pitch is a measure of how high or low a sound is. It depends on how fast the source of a sound is vibrating and changes based on the nature and length of the vibrating object. High frequency (small space between waves) = high pitch. Low frequency (long space between waves)= l ow pitch

57. 4. Amplitude is a measure of the amount of energy in a sound wave. It can be seen in the height of a sound wave and it determines volume . High amplitude (tall waves) = loud volume Low amplitude (short waves) = soft volume.