What is Light?
Light travels in straight paths called these.
What are light waves?
This happens when light bounces off a surface.
What is reflection?
Too much artificial light is called this.
What is light pollution?
Sound is created when something does this.
What is vibrate?
This is the term for when sound reflects off a surface.
What is an echo?
This is the term for something that produces light.
What is a light source?
This happens when light passes through an object and bends.
What is refraction?
Light pollution can cause this problem for nocturnal animals.
What is disrupting their ability to hunt, navigate, or function at night?
This is the term for how many vibrations occur per second.
What is frequency?
Soft materials like carpet, curtains, and foam are good at doing this to sound.
What is absorbing sound?
The Sun, light bulbs, and computer screens are all examples of this.
What are light sources?
This happens when light hits an object and does not reflect or refract.
What is absorption?
Noise pollution can lead to these three health effects in humans.
What are heart disease, stress, and sleep disruptions?
This describes the quality of a sound as high or low.
What is pitch?
This is the term for any disruptive sound that negatively affects living things.
What is noise pollution?
The speed of light is this many kilometres per second.
What is 300 000 km per second?
A material that allows all light to pass through is called this.
What is transparent?
The Moon is not a light source because it does this instead of producing its own light.
What is reflecting light from the Sun?
Amplitude is the distance between these two parts of a sound wave.
What are the peak and the trough?
Exposure to sounds over this decibel level can cause Noise-Induced Hearing Loss.
What is 85 dB?
This is the difference between natural and artificial light.
What is that natural light comes from things in nature, while artificial light comes from human-made objects powered by electricity or gas?
a) A material that allows only some light through is called this.
b) A material that allows no light through is called this.
What are translucent and opaque?
This is why light pollution makes it hard to see stars at night.
What is that artificial light drowns out the natural light from stars / creates too much background brightness?
Sound amplitude is measured in these units.
What are decibels (dB)?
This is how bats and dolphins use sound waves to determine where objects are in their environment.
What is echolocation?