4th Grade Science Light Study Guide

Light

• LIGHT IS A FORM OF?

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• ENERGY

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• THE LIGHT ENERGY YOU CAN SEE IS CALLED THE

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• VISIBLE SPECTRUM

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• SOME TYPES OF INVISIBLE LIGHT ENERGY WE CANNOT SEE ARE

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• RADIO WAVES
• MICROWAVE
• X-RAYS
• ULTRAVIOLET RAYS
• INFARED LIGHT
• GAMMMARAYS

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• LIGHT TRAVELS IN?

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• WAVES

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• THE HIGH POINT OF THE WAVE IS CALLED THE?

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• CREST

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• THE LOW POINT OF THE WAVE IS CALLED THE?

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• TROUGH

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• THE DISTANCE FROM THE TROUGH TO TROUGH OR
• CREST TO CREST IS CALLED A ?

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• WAVE-LENGTH

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• EACH ______________________ OF LIGHT ON THE VISIBLE SPECTRUM HAS A DIFFERENT WAVE LENGTH

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• COLOR

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• THE NUMBER OF WAVES THAT PASS BY A CERTAIN SPOT IN A CERTAIN AMOUNT OF TIME IS CALLED THE _________________ OF THE WAVE

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• FREQUENCY

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• WHAT IS THE DIFFERENCE BETWEEN THE LIGHT FROM THE SUN AND THE LIGHT FROM THE MOON?

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• THE SUN MAKES ITS OWN LIGHT,
• BUT THE MOON REFLECTS LIGHT FROM THE SUN.

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• WAVES MOVE IN A ___________________________ LINE
• UNTIL THEY HIT AN OBJECT

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• STRAIGHT

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• WHEN LIGHT HITS AN OBJECT, IT WILL DO ONE OF FOUR THINGS:

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• ALLOW A LIGHT WAVE TO PASS THROUGH AN OBJECT MEANS TO?

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• TRANSMIT

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• TAKE IN ALL OR SOME OF THE LIGHT WAVE
• THAT STRIKES AN OBJECT?

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• ABSORB

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• BOUNCE A LIGHT WAVE OFF AN OBJECT MEANS TO:

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• REFLECT

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• BEND A LIGHT WAVE AS IT PASSES
• FROM ONE MATERIAL TO ANOTHER

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• REFRACT

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• OBJECTS LIKE WATER, AIR, SOME PLASTICS, AND CLEAR TAPE ALLOW LIGHT TO PASS THROUGH, SO WE CAN SEE WHATEVER IS BEHIND IT- ARE CALLED?

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• TRANSPARENT

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• OBJECTS LIKE A DARK SHADE OVER A WINDOW TO NOT ALLOW LIGHT TO PASS THROUGH. THEY BLOCK THE LIGHT ARE CALLED?

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• OPAQUE

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• OBJECTS LIKE WAX PAPER OR FROSTED GLASS
• WILL LET SOME LIGHT THROUGH,
• BUT IT WOULD BE DIFFICULT FOR YOU
• TO SEE THROUGH ARE CALLED?

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• TRANSLUCENT

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• THESE OBJECTS WILL CAST A SHADOW. LIGHT IS BLOCKED BY THE PERSON OR ITEM CREATING THE SHADOW?

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• OPAQUE

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• THE SUN'S LIGHT HITTING AN OBJECT AT
• ?______THIS TIME OF DAY__________?
• WILL CREATE SHORT, FAT SHADOWS OR SOMETIMES NO SHADOW AT ALL

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• NOON

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• THE SUN'S LIGHT HITTING AN OBJECT AT ??___this time of day???
• WILL CREATE LONG THIN SHADOWS?

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• SUNSET

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• WHAT LAW STATES THAT THE ANGLE OF WAVE AS IT HITS A SMOOTH OBJECT EQUALS THE ANGLE OF THE WAVE AT WHICH IT BOUNCES OFF THE OBJECT.

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• THE LAW OF REFLECTION

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• WHAT TYPE OF MIRROR HAS A FLAT SURFACE

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• PLANE

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• WHAT TYPE OF MIRROR HAS A SURFACE THAT IS CURVED INWARD AT THE CENTER. IT WILL MAGNIFY AN IMAGE?

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• CONCAVE

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• WHAT MIRROR HAS A SURFACE THAT IS CURVED OR BULGED OUTWARD. IT GIVES A WIDE VIEW OF AN IMAGE?

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• CONVEX

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