Forms of Energy
This form of energy lets us see objects
Light energy
Light usually travels in this type of path.
In a straight line
You cannot see light through this type of object
Opaque
Sound is produced by objects that do this.
Vibrate
A student hears thunder after seeing lightning. Which traveled faster?
Lightning
This form of energy is made by vibrating objects.
A. Heat
B. Light
C. Sound
D. Electrical
C. Sound
Light from the Sun reaching Earth shows that light can travel through this.
A. Only solids
B. Only liquids
C. Empty space
D. Thick air only
C. Empty space
Which situation is an example of reflection?
A. A shadow forms behind a book
B. You see your face in a mirror
C. A black shirt warms in sunlight
D. A spoon vibrates
B. You see your face in a mirror
Sound must travel through this to be heard.
A. Light
B. A medium
C. A volume
D. Energy waves only
B. A medium
A student wants to make a shadow smaller. What should they do?
A. Move the object closer to the light
B. Move the object farther from the light
C. Use a brighter flashlight only
D. Remove the light source
B. Move the object farther from the light
A guitar string moving back and forth is an example of this motion that produces sound.
Vibration
When light bounces off a mirror, this occurs.
Reflection
If an object moves closer to a light source, its shadow will generally become this.
Larger/ Bigger
Name one medium through which sound can travel.
Solid/liquid/gas
A metal spoon in a glass of water looks bent. Which property of light explains this?
Refraction
What must happen for sound to be produced?
A. Light must be present
B. An object must vibrate
C. Air must stop moving
D. Heat must increase
B. An object must vibrate?
A pencil looks bent in a glass of water. What causes this?
A. Reflection
B. Absorption
C. Refraction
D. Vibration
C. Refraction
Which type of object allows some light to pass through?
Translucent
If the rate of vibration increases, what happens to pitch?
A. It becomes higher
B. It becomes lower
C. It stays the same
D. It disappears
A. It becomes higher
Which material would BEST reduce echoes in a gym?
A. Smooth tile
B. Metal sheet
C. Thick foam panels
D. Glass windows
C. Thick foam panels
Light and sound behave in this kind of way.
Predictably
When light hits a material and the energy is taken in and warms the object, this happens.
Absorption
A student shines a flashlight through glass and the beam continues through. This shows the material is this type.
Transparent
Explain why sound cannot travel through outer space.
There is no medium (no matter) for vibrations to travel through?
What object can you use to bend light and make a rainbow?
A prism