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Light and color

Light and color

Assessment

Presentation

•

Physics, Biology, Science

•

6th - 8th Grade

•

Practice Problem

•

Easy

•
NGSS
MS-LS1-8, MS-PS4-1, MS-ETS1-2

+2

Standards-aligned

Created by

Chelsea Walsh

Used 64+ times

FREE Resource

21 Slides • 18 Questions

1

Light and color

What is light and how do we see color?

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2

3

Multiple Choice

Light is a kind of.....
1
reflection
2
energy
3
heat
4
matter

4

The electromagnetic spectrum

  • We usually think of "light" as the light we can see, visible light.

  • Scientists also include the rest of the electromagnetic spectrum when they talk about light

  • Visible light can be split up into different colors

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5

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https://image.shutterstock.com/image-illustration/visible-light-wave-length-difference-260nw-514067863.jpg

6

Multiple Choice

What do most people usually mean when they say "light"

1

The light that we can see

2

Gamma rays

3

Infrared

4

A form of energy

7

Multiple Choice

What do scientists mean when they say "light"

1

Visible light

2

Gamma rays

3

Infrared

4

The electromagnetic spectrum

8

Multiple Choice

What kind of light propagates (moves well) in water?

1

Ultraviolet

2

Gamma

3

Infrared

4

Visible light

9

When light hits an object it can be:

  • Reflected

  • Absorbed

  • Transmitted (go through)

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10

Reflected light

  • We see objects ONLY when light reflects off of them and reaches our eyes

  • The color of an object depends on what color of light it reflects

  • For example RED objects reflect only red light.

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11

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12

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13

Multiple Choice

Question image

What color light does a traffic cone reflect?

1

Orange

2

Blue

3

Green

4

Purple

14

Absorb

  • Light that an object doesn't reflect is absorbed

  • Absorbed light gets turned into heat

  • This is why darker colored objects heat up more in the sun

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15

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16

Multiple Choice

If you want to warm up on a cold day what color should you wear?

1

White

2

Grey

3

Yellow

4

Black

17

Multiple Choice

If you want to help a house stay cool in a hot climate what color would you make the roof?

1

White

2

Grey

3

Black

4

Purple

18

19

Humans have 2 kinds of receptors in their eys

  • Rods sense the amount of light

  • Cones sense color

  • There are 3 kinds of cones: Red, Green and Blue

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20

Multiple Choice

What do the CONES in your eyes sense?

1

Amount of light

2

Colors

21

Multiple Choice

What do the RODS in your eyes sense?

1

Amount of light

2

Colors

22

Multiple Select

What are the 3 colors our cone receptors sense?

1

Red

2

Yellow

3

Green

4

Blue

23

web page not embeddable

  Deep Look | The Snail-Smashing Mantis Shrimp | Season 3 | Episode 20 | PBS

Deep Look | The Snail-Smashing Mantis Shrimp | Season 3 | Episode 20 | PBS

You can open this webpage in a new tab.

24

25

Additive colors

  • Technology that projects light uses additive color mixing

  • Our eyes sense color through additive mixing

  • TV's, computer screens, projectors

  • ADDING ALL THE COLORS MAKES WHITE

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26

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27

Multiple Select

What colors do tv screens use to make all the colors (choose 3)

1

Red

2

Yellow

3

Green

4

Blue

28

Multiple Choice

In additive color mixing: Red and green make:

1

Brown

2

Yellow

3

Green

4

Purple

29

Multiple Choice

In additive color mixing: Red and Blue make:

1

Brown

2

Yellow

3

Green

4

Purple

30

Multiple Choice

How do tv screens make white or how do your eyes sense white?

1

No colors of light

2

Equal amounts of all colors

3

Only a small amount of all colors

31

32

Subtractive color mixing

  • This is the color mixing used in printing or in painting

  • Red, Yellow, Blue are the primary colors you recognized from painting

  • Cyan, Magenta and Yellow are used in printing (with black)

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33

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In subtractive color mixing you get white by NOT adding any colored ink or paint.

34

Mixing paints and inks

  • Red+Blue = Purple

  • Red + Yellow = Orange

  • Yellow + Blue = Green

  • All three = black

  • None = white

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35

Multiple Select

What colors would you mix to get orange?

1

Red

2

Yellow

3

Blue

36

Multiple Select

What colors would you mix to get Green?

1

Red

2

Yellow

3

Blue

37

Multiple Select

What colors would you mix to get Purple?

1

Red

2

Yellow

3

Blue

38

Multiple Select

Last question: What colors would you mix to get Black?

1

Red

2

Yellow

3

Blue

39

web page not embeddable

  It's Okay to Be Smart | Why Is Blue So Rare In Nature? | Season 5 | Episode 11 | PBS

It's Okay to Be Smart | Why Is Blue So Rare In Nature? | Season 5 | Episode 11 | PBS

You can open this webpage in a new tab.

Light and color

What is light and how do we see color?

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