Show:
Sound
Light
Sound
Light
Electricity & other.
100
How do musical instruments create sound?
Musical instruments create sound by creating vibrations.
100
What is refraction?
Refraction is when light speeds up or slows down in different mediums.
100
What happens when an ear is torn?
The ear drums are less sensetive to air pressure waves.
100
What is the speed of life in km?
300,000
100
What is Voltage?
Voltage is the measure of electric "pressure" which is how strong an electric current is.
200
How does sound travel?
Sound travels through air.
200
What happens when light passes through an object?
The speed of the light changes depending on the density of the object.
200
What are the three primary layers of the ear?
1. Outer 2. middle 3. inner
200
What are visble lights?
visible lights are light that humans can see.
200
What are conductors?
Conductors are materials through which electrical currents can move "freely".
300
What are oscillospes?
Oscillospes are machines used to mesure sound waves and visualize them on a certain screen.
300
what happenes when light passes through a convex?
light is refracted towards the center line (aka conversion)
300
The higher the amplitude, the _____ the sound.
louder
300
White lights consists of? *in order
Red , orange, yellow, green, blue, indigo and violent.
300
What is the resistance of an object mean?
Resistance is a measure of a material's ability to oppose the flow electricity.
400
with what part of the ear is sound collected by?
Sound is collected by the "PINNA".
400
What are translucent objects?
Objects that let some light go through depending on the wavelenghts.
400
What are objects that vibrate more frequencies called?
Resonance
400
How are prisms are able to separate light?
Prisms seperates light by slowing the light, which changes its directions.
400
Name 6 ways to generate electricity.
1. Wind 2. Hydro-electric 3. Wave 4. Tidal 5. Geothermal 6. Biomass
500
Why does wax in the ear prevent from hearing?
Wax prevents the vibrations reaching the ear drum.
500
What is the law of refraction?
The law of refraction is that the INCIDENT angle and the REFLECTED angle are the same.
500
What is the loudness of sound mesured in?
Its mesured in decibles.
500
What are the three types of mirrors?
Plane mirrors, concave mirrors and convexmirrors.
500
What is electricity?
Electricity is the flow of electrons from one atom to another through a substance.