4th Grade Science Light Study Guide

Slide 1

Light
    LIGHT IS A FORM OF? 

Slide 2

ENERGY

Slide 3

    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

Slide 7

    LIGHT TRAVELS IN?

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WAVES

Slide 9

    THE HIGH POINT OF THE WAVE IS CALLED THE?

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CREST

Slide 11

    THE LOW POINT OF THE WAVE IS CALLED THE?

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TROUGH

Slide 13

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

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WAVE-LENGTH

Slide 15

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

Slide 16

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

Slide 19

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

Slide 20

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

Slide 21

  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

Slide 26

  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: 

Slide 29

REFLECT

Slide 30

    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

Slide 41

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?

Slide 51

CONVEX

Slide 52