Unit 2: Thinking Like a Scientist

Theme 4: What is Sound?

http://hacknmod.com/wp-content/uploads/2009/04/sound_wave.jpg

melody- the main tune of a song

The melody of a song is often a catchy one that a person easily remembers.

http://www.betterguitar.com/instruction/music_notation/lesson_5/when_the_saints.gif

harmony- when different tunes in a song go together well

The harmony of songs is written by a musical artist.

http://img.youtube.com/vi/K8345fyoGLQ/0.jpg

broadcast- when a television or radio program is sent over the airwaves

The television will broadcast the sports game in HD-TV.

http://www.broadcast-integration.com/image/users/115145/ftp/my_files/NBC_Nightly_News_Broadcast.jpg

improvise- to make it up as you go along

The musicians used buckets to improvise when they did not have drums.

http://farm4.static.flickr.com/3153/2904597557_e467941663.jpg

experiment– the act of trying something to see if it works

Scientists try different experiments to find new discoveries.

http://www.intalek.com/Index/Projects/SparkGapExp/SparkGapExperiment.jpg

length– how long something is

The length of the box is about 4 feet long.

http://upload.wikimedia.org/wikipedia/commons/thumb/d/dc/Length.svg/800px-Length.svg.png

concentrate– to pay close attention to something

To stack playing cards, one would have to concentrate carefully.

http://the-ideal-school.org/pictures/Student_Life/concentration.jpg

instrument- a device for producing sounds

In music, there are many different instruments used to produce sounds.

http://projects.cbe.ab.ca/AlexFerg/showcase07-08/rehakclassblog1/ist2_2113889_vector_music_instruments.gif

vibration- a rapid back-and-forth movement

Sound waves are produced by the vibration of an object, such as a violin string.

http://media-2.web.britannica.com/eb-media/89/26989-004-3708153A.gif

pitch- how high or low a sound is

The high pitch of a baby’s cry hurts my ears.

http://kempefoundation.files.wordpress.com/2009/07/crying-baby.jpg