Light
_______ is a form of electromagnetic energy that our eyes can detect.
Light.
What is the difference between natural light and artificial light?
Natural light is produced by nature, artificial light is light from things made by humans.
Light travels in straight paths called _____________.
Light waves.
Are we transparent, translucent, or opaque?
Opaque.
What does it mean to emit or reflect light?
Emitting light means that it creates its own light, reflecting light means that it reflects off another source of light.
How does light travel?
Light travels in a straight line.
Name an example of natural light.
Sunlight, campfire, fireflies, candles, lightning, etc.
What do reflection, refraction, and absorption mean?
Absorption of light occurs when light stops at the object. Reflection of light occurs when light bounces off the surface of the material. Refraction of light occurs when light passes through the object and bends.
What do transparent, translucent, and opaque mean?
Transparent materials allow light to pass through. Translucent materials allow some of the light to pass through. Opaque materials do not allow any light to pass through.
Does the moon emit its own light?
No, it reflects the light from the Sun.
Something that produces light is called a _____ _______.
Light source.
Name an example of artificial light.
Light bulb, fireworks, cell phone, flashlight, computer, etc.
Name an object that absorbs light.
Book, t-shirt, wood table, coal, black paint, etc.
Name a transparent material.
Windows, any clear glass materials...
Name something that emits its own light.
The Sun, stars, light bulb, laser, candle, fireflies, etc.
What affects the direction and size of a shadow?
The Sun.
What is it called when there is too much artificial light?
Light pollution.
Name an object that reflects light.
Metal spoon, mirror, metal trash can, windows, etc.
Name a translucent material.
Ice, water, frosted glass, sunglasses, ziploc bag, tissue paper, bubble wrap, etc.
Name something that reflects light.
Moon, glitter, safety vest, cat's eye, diamond ring, etc.
Do all objects have shadows? Explain why.
No, only opaque objects have shadows. Transparent and translucent objects do not.
What is one consequence of light pollution?
Disrupts a human's natural sleep cycle, artificial light at night increases stress, anxiety, and fatigue, stars and planets are harder to see, confuses animals and disrupts their migration patterns, etc.
Name an object that refracts light.
Diamond rings, water, boiling water, glasses, etc.
Name an opaque material.
Mirror, book, pencil, wood, steel can, ice cream, carboard, tin foil, etc.
Is it possible for something to emit its own light but also reflect light? Name an example.
Yes. Examples include: flashlight, cell phone, television, etc.