Physical world-G8-Tri3-2016.pdf

8/16/2019 Physical world-G8-Tri3-2016.pdf

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Page 1 of 9

Worksheet (1)

Light

Key words :

White light :The light that comes from sun

Absorb : When the object doesn’t reflect the light

Reflect : When the ray of light bounces off an

object and changes its direction

1- Does the plant leaf absorb or reflect green light ?

The leaf reflects green light

2- Does the plant leaf absorb or reflect blue light ?

The leaf absorbs blue light

3- What color of light does a yellow banana reflect?

The banana reflects yellow light

4- If you take a photo of a white piece of paper in a

forest, the paper will look green in the photo.

Why?Because it reflects all light colors so it reflects green

color from the forest and appear green

5- Why do you see the class board white?

Because white materials reflect all light colors

6- The coal piece looks black, why?Because black materials absorb all colors and don’t

reflect any light color.

7- What is the color produces from mixing the

seven colored rays?White color results from mixing the seven colors

8- When we expose a banana to green light its

color will appear black, because the yellow

materials absorb all colors and reflects yellow only.

So when it’s exposed to green color the banana

absorbs it and reflects nothing so appears black.

اــــو

: تك

اض: ـو شـا ن يذا ءو ـا

وئـص: ـا ع شـا م ـا س ـ د ـ

: ركـس ـ و م ـ ئو ـا ع شـا مد طـ د ـ

ـ

ر -1 ـخا ءو ـا س ـ مأ ص ـ ت ـا ـرو ل ـ……………………………………………………………………………………………………………………

وء ازرق -2 ـا س ـ مأ ص ـ ت ـا ـرو ل ـ……………………………………………………………………………………………………………………

وزة -3 ـا ـ ـ يذا نو ـا ـ……………………………………………………………………………………………………………………

وف-4 ـ ـرو ـا ن ـا ء ـ رو ـ ةرو ـ ذ خـأ اذإ

ون ـ

ر ـظ

ذا ـ

.ورة ـا

ر ـخا

……………………………………………………………………………………………………………………

ض -5 ـا نو ـ ف ـ ةرو ـا ىر اذ ـ……………………………………………………………………………………………………………………

ذا -6 ـ . ود ـا نو ـ م ـ ـا ـط ود ـ……………………………………………………………………………………………………………………

7- ج ـا نو ـا ـاو ـا ـ شـأ ط خـ

ـ ـا

……………………………………………………………………………………………………………………

وف-8 ـ ر ـخا ءو ـا إ ةزو ـا ضر ـ ـد ـ ـ

ون ـ ر ـظ……………………………………………………………………………………………………………………

Abu Dhabi Education Council

Al Tamayoz School Cycle 2

Science De artment

Name : Grade : Date :


2/9


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Worksheet (3)

LightKey words :

Translucent : A material that light can travel

through, but which you cannot see through clearly

Screen : A flat surface that an image appears on

Pinhole camera:

How to make your camera ?

1- Take the lid of the box so you can see inside

2- Make a small hole in the middle of on end the

box.

3- On the other end of the box , cut most of theend away

4- Paint the inside of the box and the lid black, and

stick tinfoil in front of the pinhole . This will

improve your camera

5- Stick a sheet of translucent paper over the end

that you have cut away. This will be the screen

6- Put the lid on the box . your camera is ready to

use, Look at some objects on the screen

7- Describe the images you see on the screen :

(1)Smaller than the original tree, (2)upside down image

اـــو

: تك

: ف شـ هـشئو ـا شـا ن ءز ـ رور ـ ـ ةد ـ خـ

ـؤرا

ن ـ

ن ـوو ـو

: ـشـرشو ـا ر ـظ و ـ ط ـ

: كـرا اخـزا ذات اـب

را ـ

ـ

ك

ف

1- خـاد ـ ىر ـ قود ـا ن ء طـا ـرا

2- قودا ت ـ د ـأ ب ـث ل ـا

ط ـو

3-ش

ـ

دوق ـا

ن

رى خـا

ـ ـا

ظم ـ

ط ـا

و

4- ء طـا كذو دو ـا نو ـ ل خـادا ن قود ـا ـا

ل ـ

را ـا

ل ـ

ذك

.ب ـثا

در ـ

ورق

ـ

ل ـأ ل شـ

دوق اذي ت-5 ـا فر طـ ـش شـ ـرو ـا

را ـا ش شـ نو ـ فو ـ . ـ طـ

دوق-6 ـا ء طـا ـةز ـ ت ـأ كر ـ نا

ش شـا

ل خـ

ء شـا

ض ـ

إ

ر ظـأ

,ل ـ

7-: ش شـا و ـا ةرو ـا ت ـ ـو …………



Science Department

Physical World


object imageobject image


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Page 4 of 9

Worksheet (4)The Eye

Your eye in a similar way to the pinhole camera

* Describe the image formed in the human eye :(1)Smaller than the original object, (2)upside down image……………………………………………………………………………………………………………………….

* Match each part of the eye with its function :

1- Pupil (3) the transparent cover in front

of the eye

2- Iris (1) the part of the eye that lets

light in

3- Cornea (4) the black surface of the eye

act as the screen

4- Retina (5) communicates information

from the retina to brain

5- Optic

nerve

(2) the colored part of the eye

that surrounds the pupil

اــــن

ـ

ر طـ

ب ـثا

ذات

از خـا

را ـ

شـ

ك ـ

: رـشا نـا وـكا ةرو ـا تـ ـو *………………………………………………………………………………………………………………………

………………………………………………………………………………………………………………………

اـن ووظه ن أجزا * ـل ن كل جـز

1- ؤ ـؤ ـا

ط

اذي

ف شـا

زء ـا

زء ـ ـا ن ـا

2- ز ـا رور ـ يذا ءز ـا

وء ـ ـا

ل خـاد

إ

3-ـر ـا يذا ن ـا لخاد دوا ءزا

ش شـا

ل ـ

ل

4- ـ شـا شـا ن تو ـا ل ـو

ـد ـ

5-ارا ب يذا ن ـا ن نوا ءز ـا

ـؤ ـ

cornea

iris

pupilretina

Optic nerv



Science Department



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Worksheet (5) Light Reflection

Key words :Light reflection : The light beam bounce when

hitting with a surface

Incident ray : The light ray which hit the mirror

Reflected ray : the light ray reflected from the

mirror

* Reflection law :

The reflection angle is (more than – less than –

equal to) the incidence angle

* Compare between specular reflection and

diffuse reflection :

* Explain :

All students in the class can see the diagram on the

board? The light comes from the source/data-show

is reflected off the screen/board and enters

students eyes forming an image on their retina

which is transferred into their brain through the

optic nerve.

اـكس اـو

:

:كت داكس اـو طـ ـا د ـ ـ ئو ـا شـا دادرا

س ـ ط ـ: رآشـع اـقط ـا ط ـا ئوا ع شـا

: عشـع اـكس شـا س ـ ـا ئو ـارآة ـ

: * قـون اـكس

ـوازان رأ ( –ن ر ـأ –) وي ـوط ـ ـا

ـواز

* قـرن ن اـكس اظـم و اـكس

: ـر ظـم

: * ــر

وم ـرا

ل شـا

رون

ف ـ

ب طـا

ـ

ورة ـ

………………………………………………………………………………………………………………………

………………………………………………………………………………………………………………………

Comparison Specular reflection Diffuse reflection

1 Reflecting surface Regular Irregular

2 Reflected rays direction Same direction Different directions

3 Reflection law The reflection angle = The incidence angle



Science De artment



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Page 6 of 9

Worksheet (6)

Light Reflection

* Complete the following figures :

* Fill in the gaps by guide words :

( black – equals – reflected – yellow )

1- The light beam hitting a mirror is reflected

to the opposite direction

2- When we expose a red apple to green light it will

appear black in color

3- The reflection angle equals the incidence angle

4- The lemon fruit is yellow because it reflectsyellow color of the light spectrum

اــو

اـكس

: ـا لكـشا لـكأ *

:ـا

ـك

ـا

اـراغـت

ـا

*

ود ـأ –يو ـ –س ـ –) أـر

رآة-1 ـ مد طـ ـ ا ئو ـا شـا………………………..

ا ـا

2-ا ـا ضر ـ د ـ ـ ر ـخا ءو ـا إ ءار ـ

ون ـ ر ـظ………………………..

3- ـوازا…………………….. ـ ـواز

وط ـ ـ ـ

ون-4 ـا س ـ ر ـا نو ـ نو ـا ةر ـث ر ـظ

وئ..……………………… ـا ف طـا ن



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Page 7 of 9

Worksheet (7)Light Refraction

Key words :

Light refraction : The change of the angle of a ray

of light when it moves between two transparent

materials

Transparent : A material that light can travel

through

Optical density : The ability of the material to

refract light beam

When a ray of light move between two different

transparent materials the speed of light changes

and the angle of the straight ray of light will change

* There are three cases of refraction according to

the optical density of the transparent materials

1- When the ray travels from air (lower optical

density) to water (higher optical density), the ray

refracts (approaching or away from) the normal

2- When the ray travels from water (higher optical

density) to air (lower optical density), the ray

refracts (approaching or away from) the normal

3- When the ray moves vertically between two

transparent materials it doesn’t deviate and pass

without refraction

اــو

اكـــر

: تك

: ل نكـر اـو ـ د ـ ـ ئو ـا ع ـشا فار ـ ـا شـ نط ـنو

: وشـــف ـ ـا رور ـ ـ ـ ـ ا ةد ـا خـ

: ئوـا ـك ـ ـ شـا ر ـ ـ ف ـ ـ شـا ط ـ ـوا ةرد ـ ـئو ـ

ن شـ

طن ـو

ن

ئو ـا

ع ـ شـا

ل ـ ـ

د ـ ـ

ه ـا

ر ـ

ذك

و

ر ـ

وء ـا

ر ـ

ن

ن خـ

ئو ـا ع ـ شـ

ئوـا ـك ـ ث ـت كـر اـو ـ دـجو *

وـط اشـف

1- ثـ ل ـا ( واء ـا ن ئو ـا ع شـا ل ـ د ـ ـ

ر ـ

ع شـا

ن

)ئو

ثـ

ـا

(ء ـا

إ

)ئو ـ

و ـ

ن

)د ـ

أم

ر ـ

ـا

د

2- ثـ

ـا

(ء ـا

ن

ئو ـا

ع شـا

ل ـ

د ـ ـ

ر ـ

ع شـا

ن

)ئو

ثـ

ال

(واء ـا

إ

)ئو ـ

ر ـا

ود ـ

ن

)د ـ

أم

ر ـ

طن-3 ـو ن دو ـ ئو ـا ع شـا ل ـ د ـ ـ

ن شـ ـ نأ نود ر ـ و هر ـ ن فر ـ

ر ـ



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Water ( n 2 )

Air ( n 1 )


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Page 8 of 9

Worksheet (8)

Light Refraction

* Complete the following figures :

* Why we see objects under water above the real

position ?

Because of light refraction as in the next figure

* Write true or false for each of the following :

1- Refraction is most obvious when you look

directly down through the water [×]

2- Refraction is most obvious when you are looking

across the surface of the water [√]

3- Refraction is the same at whatever angle you

look at the surface of the water [×]

اــو

اكــر

: ـا لكـشا لـــكأ *

ـقوـ

ن

ـأ

ـ ـا

ت ـ

ـشا

رى

ـذا

*ــ

ا ب ـ ـا ل شـ ـو ـ ءو ـ ـا رــ

: ـ لك مـأ طـخ مأ ـ بـكأ *

1-ط ـ إ دو ـ ر ظـ د ـ ـ ـوأ ر ـا نو ـ

ء ـ ـ[ ]

2- ـوأ ر ـا نو ـر ظـ د ـ اـذط ـ

ء ـ ـ

[ ]

3- ر ظـ ا ـوازا ت ـ شـ ر ـا نو ـ

ء ـ ـا ط ـ [ ]



Science Department


Air

Water

Air

Water

Air

Water


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Page 9 of 9

Worksheet (9)

Splitting White light

* What are the colors that white light made of ?ROYG BIP (Red – Orange – Yellow – Green – Blue – Indigo – Purple)

Explain:*

White light splits into seven colors when it passes

through a glass prism

* Why can we see rainbow on rainy days?

Because rain droplets act as small prisms which refract

and split white light into spectrum of 7 lights“rainbow” (see the previous question)

اــو

ــل

ا ـض * ـ اـوان ا كون ـ اـو………………………………………………………………………………………………………………………

………………………………………………………………………………………………………………………

: * ـــر

روره ـ د ـ ـ ناو ـأ ـ إ ض ـا ءو ـا ل ـور شـ

ل خـ

………………………………………………………………………………………………………………………

………………………………………………………………………………………………………………………

طرة ـا مـا حزـق سوـق ىر اذـ *………………………………………………………………………………………………………………………

………………………………………………………………………………………………………………………

glass prism

White light



Science Department


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Physical world-G8-Tri3-2016.pdf