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Jan 18, 2016
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Vocabulary Vocabulary Sound Sound Sound
While hiking, Christia calls her friend’s name loudly. What might she hear when the sound waves bounce off the smooth surface of a cliff?
Which is softer than normal conversation?
A.Light whisper B. Noisy office
C. Normal Traffic D. Rock music concert
Which is louder than a rock music concert?
A. Jet takeoff B.Normal
Conversation
C. Noisy Office D. Normal Traffic
Static electricity is a build up of charges in one places and
current electricity is charges in motion
When riding in a car, you notice that the wheels
make sounds against the pavement. The pitch rises as the car speeds up. State a hypothesis based on this
observation.
The pitch of the wheels increases with speed
because the vibrations caused by the wheels get faster as the car moves
faster.
You want to experiment to test how well various
materials muffle sounds. Which variables would you keep the same and which
would you change?
Same: person listening, sound
being blocked, room where test is made.
Change: material blocking sounds.
Olivia is standing at her front door. Her friend
Gabe is five houses down the street. Olivia yells,
“Gabe!” How is the sound of Olivia’s voice transmitted to Gabe?
Gabe doesn’t hear Olivia when she calls. When she calls again,
what are two things she can do to make sure that
Gabe hears her?