SOUND

Which of the following would not produce a sound?

• humming a flocabulary song in the hallway
• Knocking a fist against a wooden wall
• plucking a guitar underwater
• snapping your fingers where there is no matter, like outer space.

How can humans perceive, or understand sound?

• They can only hear it
• They can only hear and see it
• They can hear it, and might also see and feel it
• Humans cannot perceive sound

CJ puts a ruler on the edge of a table, so that a few inches hang off. He hits the ruler and hears a noise. What else does CJ observe? 

• The noise starts out low pitched and becomes high pitched
• The part of the ruler he hit is completely still
• The part of the ruler he hit is moving back and forth
• The noise starts out soft but becomes louder

How does sound energy travel?

• Sound energy travels in waves that need a solid, liquid or gas to carry them
• Sound energy travels in waves that can move through the vacuum of empty space.
• Sound energy travels in a straight line in one direction
• Sound energy travels in a straight line that switches directions periodically

How does a person hear a sound from far away?

• Vibrations move by soundwaves through different materials, then enter our ears which send messages to our brain.
• The sound echos past all of the materials.
• Sound moves faster than the speed of light
• Sound bounces off different objects back and forth until you hear it.

Sound is a form of

• noise
• music
• Vibrations
• Energy

Sound is energy in the form of

• A large drum
• The rumble of a truck
• A fire alarm
• A roar from a bear

While hiking a mountain, Sara called out, "YOO HOO!" She then heard her own voice say, "YOO HOO. YOO HOO. YOO HOO." What happened?

• The sound was completely absorbed by the mountain
• The sound was completely carried through the mountain away from Sara
• The sound reflected back to Sara as an echo
• The sound didn't travel well at all

Light is a form of energy that travels in a wave. It does not need any material to carry its energy. Humans can see the range of light in the visible light spectrum. Based on this description, how is sound different than light?

• Sound does not travel in a wave
• Sound is not a form of energy
• Sound cannot be perceived by humans
• Sound needs a material to carry its energy

A noise will travel faster through a solid because

• the particles are further apart
• the particles are very close together
• you can´t hear noise through gas
• solids particles move faster through the air