Grade 3 Unit P.1 Forces, Magnets and Springs. Forces, Magnets and Springs

Size: px

Start display at page:

Download "Grade 3 Unit P.1 Forces, Magnets and Springs. Forces, Magnets and Springs"

Jack Kelly
6 years ago
Views:

1 Forces, Magnets and Springs 1

2 عب ١٠ ش ا حذح 10.1 Know that the effect of force depends on its direction as well as its size Demonstrate that there are forces of attraction and repulsion between magnets Know that some metal objects are attracted to a magnet but others, such as aluminum cans, are not Know that magnetic forces can act through non-metallic materials Give examples of some of the ways that magnets are used in everyday life Show that a stretch or compressed spring can exert a force. 1.1 Devise a fair test or comparison and recognize when conclusions are justified. 1.2 Make, test prediction and draw conclusions from observations and data. 3.1 Handle simple equipment correctly, safely and without damage to carry out simple experiment. 2

3 Force: is a push or a pull. It can change the motion of objects. ا دفع ا عحت جغ ٠ ؤد ا رحش ٠ ى ا ا ٠ مبف ا رغ ١١ ش شى Push: moves something away from you. ا ذفع رحش ٠ ه االش ١ بء ثع ١ ذا ع ه Pull: moves something closer to you. ا غحت رحش ٠ ه االش ١ بء لش ٠ جب ه Magnetism: is a force of attraction or repulsion that acts between certain objects called magnets. ا غ طخ ل ح ا زجبرة ا ز بفش ث ١ ا غ ط ١ ظ Magnetic: materials that attracted to magnets are called magnetic like: iron, steel, and some rare metals. ا اد ا غ طخ ا ز رجزة ا ا غ ط ١ ظ رى ص عخ ا حذ ٠ ذ ا ا غز ١ Non-magnetic: materials include silver, gold, copper, aluminum and lead. ا اد ا غ ١ ش غ طخ ا ز ال ٠ جزث ب ا غ ط ١ ظ Pole: is the place on a magnet that has the strongest push or pull. لطت ا غ ط ١ ظ ال مطخ ف ا غ طغ ١ ظ جزة Attract: means to pull toward. قىج انجز ه قىج انسذة Repel: means to push away. قىج انر افش و ه قىج انذفع 3

ا م ح ا دفع ا عحت ٠ ع ع رحش ٠ ه االجغب و ب صادد ا م ح صادد ا حشوخ pull push ا ذفع ا غحت * You can use force to move an object up, down, right, or

4 Questions you may have about force: ب ا م ح force? What is a ب ا اع ب? forces What are kinds of و ١ ف ٠ ز force? How do you measure ل ١ بع ب Force is defined as a push or a pull that makes something move. The more force you use, the more the object moves. ا م ح ا دفع ا عحت ٠ ع ع رحش ٠ ه االجغب و ب صادد ا م ح صادد ا حشوخ pull push ا ذفع ا غحت * You can use force to move an object up, down, right, or left. You can make it move in a straight line, a curve, or even a zigzag. ى ا رحشن االش ١ بء ثأرجب بد خز فخ ثم ح ع ١ خ ثز ج ١ ع ١ ى ا رحشو ب ثخط ط غزم ١ خ ا ح ١ خ ا ثخط ط زعشجخ صوضان- 4

Forces can make things: 1 2 3 4 اداح م ١ بط ا م ح (N) Forces are measured in newtons بن حذح م ١ بط ا م ح ا ١ ر Forces

Force meter Don't forget that you can't see forces, but you can see the effect of a force something speed up, slowing

5 Forces can make things: اداح م ١ بط ا م ح (N) Forces are measured in newtons بن حذح م ١ بط ا م ح ا ١ ر Forces are often measured using a spring-balance called a force meter (or Newton meter). Force meter Don't forget that you can't see forces, but you can see the effect of a force something speed up, slowing down, changing direction, or changing shape. انقىج ي ك ا ذز ذد سشعح انجسى او ذقهم ي سشعره و ي ك ا ذىقفه او ذغ ش ي شكهه دسة دجى انقىج او اذجاهها و ذأث شها عه االجساو 5

6 Force Answer these questions: اجت ع االعئ خ ا زب ١ خ force? What is. 1 ب ا م ح Force is a or a forces? What are kinds of. 2 ب ا اع ا م ح A. B. 3. What are the four things that forces can cause objects ب رأث ١ شاد ا م ح to do? forces? What are the units of. 4 ب ١ ت حذح ل ١ بط ا م ح. ): X Put ( ) or ( ضع صح ا خطأ. 1 ى ا ش ا م ح( ( forces. We can see 2. ى ا ش رأث ١ ش ا م ح( ( forces. We can see the effect of 6

7 Draw a line to match each word with its picture: ص ا ص سح ى خ ا صح ١ حخ 1. push 2. pull Tell how each thing is being moved. pull. Writeع ١ push or ع ا م ح ا صح ١ حخ ص سح ا بعجخ 7

8 Sort the pushes and pulls (use arrows!): سرت ا ص س حغت ع ا م ح Pushes دفع Pull عحت 8

9 Homework Force 1. Circle the toys you push. Make an X on the toys push. youضع دائشح ع اال عبة ا ز رذفع خطأ ع اال عبة ا ز رغحت 2. Mark an X on objects that move easily with a gentle push. ضع خطأ ع االجغب ا ز رزحشن ثغ خ 9

10 Both these toy cars traveled across the floor. ع ف ز ا زجشثخ ج ١ ذا ث اجت ع االعئ خ ا زب ١ خ Car A Car B 0 cm 10 cm 20 cm 30 cm 40 cm 50 cm 1. How far did Car A travel? ب ا غبفخ ا ز لطعز ب ا غ ١ بسح ا 2. How far did Car B travel? ب ا غبفخ ا ز لطعز ب ا غ ١ بسح ث 3. Which car traveled farther? ا ٠ ب اعشع 4. Which car was given a soft push? ا ٠ ب ر مذ دفعخ خف ١ فخ 5. Which car was given a hard push? ا ٠ ب ر مذ دفعخ وج ١ شح 6. Tell how you know which car was pushed harder? فغش اجبثزه االخ ١ شح

11 Look at these pictures & decide ا ه ا more? 1. Which one will move سررذشك 2. force: Choose the biggest ا ه ا اكثش قىج 10 N 50 N 3. What do the arrows show on the ان يارا شيز انسهى diagram? force ياه انقىج 4. What is a force 11

How can this girl move this chair? How many ways? What are they?

12 1. How can you fix this pin like this picture? Which kind of force و ١ ف رثجذ ا ذث ط ثأ ل ح? use you will 2. How can this girl move this chair? How many ways? What are they? و ١ ف رحشن ا ىشع عذد ا اع ا م ح اسع ع ب زحذد ارجب ا م ح ف ا ص سح ا زب ١ خ 3. Draw the arrow to show the direction of force and name it: 12

13 Name these forces in the boxes below the اكرة ىع انقىج ذذد كم ي انصىس انران ح: as pictures Push force or pull force 13

14 There are different kinds and shapes of spring ا غجش ه ا ا ض جشن ل ع ١ خ ا ىجظ ا شذ حغت االرجب ا ز رغ ط ع ١ ا م ح حغت ع ا غجش ه 14

Class Work Springs Draw a circle around objects which have springs? اسع دائشح ح ي االجغب ا ز ف ١ ب ا غجش ه أ ا ض جشن ا حذ ٠ ذ Activity:Bring a spring from home any type!

Ask children the following questions to make them think about how they would test the springs: What will you do? What equipment will you need? How will you keep your test fair?

15 Class Work Springs Draw a circle around objects which have springs? اسع دائشح ح ي االجغب ا ز ف ١ ب ا غجش ه أ ا ض جشن ا حذ ٠ ذ Activity:Bring a spring from home any type! (Teacher will lead) Collect the different springs - and distribute and tell them they have to answer the question Which spring is the stretchiest? Ask children the following questions to make them think about how they would test the springs: What will you do? What equipment will you need? How will you keep your test fair? How will you make sure your test is safe? What will you measure? How will you record your results? What will your table look like? Which spring do you predict will be the stretchiest? Why do you think this? 15

16 Magnets 16

17 Magnets ب ا غ ط ١ ظ magnet? What is a برا ٠ جزة ا غ ط ١ ظ? attract What can a magnet magnetism force of attraction or repulsion ان غ ط س ح ه قىج جزب او ذ افش not all objects are affected by the force of magnetism ex. wood, glass, paper, plastic ال ذرأثش ج ع ان ىاد تان غ ط س يثم انخشة و غ شها common metals affected by magnetism : iron, ي ان ىاد انر ذ جزب نه غ ط س هى انذذ ذ poles two ends of a magnet ه اك قطثا نه غ ط سpoles every magnet has two انش ان north (N) pole انج ىت south (S) pole even if you break a magnet in half, each half will have a north pole and a south pole The ends of a magnet are where the magnetic در نى ا كسش ان غ ط س strongest. effect is the ان اث ا او اكثش سرذرفظ كم قطعح تقىذها نهجزب و كم قطعح س صثخ نها فس انقطثا These are called poles. Each magnet has 2 poles 1 north, 1 south. 17

18 Magnets can push or pull certain metal objects. A pole is the place on a magnet that has the strongest push or pull. جغ عذ ٠ غزط ١ ع ا ٠ حشن االجغب ا حذ ٠ ذ ٠ خ االخش ثب غحت ا ا ذفع Magnets are pieces of metal that have the power to attract other pieces of metal. لطعخ ا عذ ذ ٠ ب ل ح جبرث ١ خ الجغب ا عذ ١ خ االخش - Magnets attract objects made of iron or steel. ا غ ط ١ ظ ٠ جزة ا حذ ٠ ذ ا ا غز ١ - Magnets have a 'N' and 'S' pole. ذ ا غ ط ١ ظ لطجب ش ب ج ث S N - Like poles repel each other. االلطبة ا زشبث خ رز بفش S S - Different poles attract each other. االلطبة ا خز فخ رزجبرة N S - There are different shapes of magnets. I have a horseshoe, ring, and a bar magnet. بن اشىبي ز عخ ا غ ط ١ غبد S N Bar horseshoe circular 18

19 - Compass - an instrument that is used to find directions. This instrument has a needle that points north. ا ج ص خ اداح رش ١ ش ا االرجب بد االسعخ خالي اثشح غ ط ١ غ ١ خ دل ١ مخ رش ١ ش دائ ب ا ا ش بي The magnetic force of a magnet can pass things through materials like... water, glass, aluminum, and paper. ل ح ا غ ط ١ ظ ى ا رخزشق ثعض االجغب ث ا بء ا ضجبج ا خف ١ ف اال ١ ا شل ١ ك ا سق 19

20 Class Work Grade 3 Unit P.1 Forces, Magnets and Springs ضع دائشح ع االجغب ا ز ٠ جزث ب ا غ ط ١ ظ Circle the items the magnets will attract. Sci 20

sentences: Completeاو these ا عجبساد ا زب ١ خ 1. Magnets are pieces of ------ that attract things.

People use different kinds of ----------- in different ways. ٠ غزع ا جشش ا اع خز فخ.

.....ص 5- Sailors use a ----------- to find out direction. ا جحبس ٠ غزع ١.

21 sentences: Completeاو these ا عجبساد ا زب ١ خ 1. Magnets are pieces of that attract things. ا غ ط ١ ظ لطعخ Magnets can things made of iron. ا غ ط ١ ظ ٠ غزط ١ ع ا... ا ص عخ ا حذ ٠ ذ 3. People use different kinds of in different ways. ٠ غزع ا جشش ا اع خز فخ Every magnet has a and a pole. و غ ط ١ ظ......ص 5- Sailors use a to find out direction. ا جحبس ٠ غزع ١... عشفخ االرجب بد ف ا جحش Record Data ضع دائشج عه االجساو انر ذ جزب نه غ ط س و خطأ عه االجساو انر ال ذ جزب Circle the things that are pulled by magnet. Make an x on the things that are not pulled by a magnet. 21

22 Match each word to the picture it tells about. ص ث ١ ا م ح ا ص سح Attract Repel S N S S Write two sentences about magnets: اوزت عجبسرب ع ا غ ط ١ ظ ث ب ا ا غ ط ١ ظ ٠ جزة ا حذ ٠ ذ زا ش ٠ ذ ا ر ال مطخ ف ا غ ط ١ ظ ثعذ سع The magnet attracts iron bits. Color the parts of the magnet that have the strongest force: 22

23 ضع دائشج عه االجساو انر ذجزب نه غ ط س Circle things that are attracted to a magnet: Gold Iron sharpener Put a tick ( ) next to the picture that shows Steel clock : attractionذجارب repulsion: Putضع (X) next the pictures that show عاليح خطأ عه انر افش 23

24 Put (T) or (F): و ا غ ط ١ غبد ل ٠ خ 1. All magnets are strong. ( ) الر جزة ج ١ ع ا عبد غ ط ١ ظ 2. Not all metals are attracted to magnets. ( ) غ ط ١ ظ اسثعخ الطبة 3. Magnets have four poles. ( ) سالت ع ذ ب رمشة ا مطت ا ج ث الحذ ا غ ط ١ غبد اخش ب ع عصح ا ظ بع برا رش برا ٠ حص Observe and describe then write what happens when you actually bring the south pole of one bar magnet near the other magnet on a desk or a smooth surface. 24

25 Homework Grade 3 Unit P.1 Forces, Magnets and Springs Pre-Test 1. A magnet will pick up a ان غ ط س هرقط. A. paper clip B. piece of wood C. piece of chalk D. shoe 2. Magnets should not be put near ذج ة وضع ان غ ط س د ة ال. A. desks B. books C. computers D. pencils 3. The two ends of a bar magnet are called the طشفا ان غ ط س س ا ب ال. A. rods B. poles C. backs D. ends انقطثا ان رشاتها. poles 4. Like A. attract B. repel C. do nothing D. stick together 25

26 ذجذ. in 5. You can find a magnet ان غ ط س ق A. a rocking chair B. a pencil C. a picture D. an electric can opener Post-Test Grade 3 Unit P.1 Forces, Magnets and Springs 1. The magnet that picked up the most paper clips (the strongest) was. يا ىع ان غ ط س انز جزب اكثش عذدد ي دتات س انىسق A. the bar magnet B. the horseshoe magnet C. the circle magnet D. the piece of wood 2. The strongest part in a magnet is. اقىي قطح ف ان غ ط س A. in the middle B. all over C. at the poles D. on the front 26

27 برا ٠ جزة ا غ ط ١ ظ? Attract What Do Magnets Things to try ٠ جزةattract Do ال Do not attract ٠ جزة 27

28 Choose the correct answer: 1. Magnets are made of stones. - steel or iron. - any metal. - plastic. 2. Magnets have one pole. - two pole. - three pole. - four pole. 3. A magnet doesn't attract iron. - steel. - nails. -diamonds. ج ع ان غ ط ساخ نها قطثا ش ان و ج ىت و ج ع ان غ ط ساخ يص ىعح ي انذذ ذ ان عانج تطش قح يع ح ن جزب تعض ان عاد و ي ها انذذ ذ و انسر م و سرع م ان غ ط س ف ح اذ ا ان ىي ح و ف عذج يجاالخ و ي ها ان غ ط ساخ ان سرع هح ف اطاستاب انثالجح و ان غ ط ساخ ان سرع هح عه تاب انثالجح و ف داخم االجهزج انكهشتائ ح ىد ا ثه ا ال قشب ان غ ط ساخ ي انكىيث ىذشاخ و االجهزج االنكرشو ح انذق قح ال ه سثة نه انعطم و انرهف 28

Why can a magnet pick up a nail, but bottle?

parts? than برا other رغحت ثعض االجضاء ال غ ١ ش ب.

some برا things and not ل ح ا غ ط ١ ظ رخزشق ثعض ا اد ١

The discovery of magnets was very important as they

Things that would disappear if we had no electricity

29 Why can a magnet pick up a nail, but bottle? not برا a soda can or ٠ جزة ا غ ط ١ ظ ا غ بس ال ٠ جزة ع جخ ا ججغ. Why do some parts of a magnet push and pull harder parts? than برا other رغحت ثعض االجضاء ال غ ١ ش ب. Why can a magnet pull through others? some برا things and not ل ح ا غ ط ١ ظ رخزشق ثعض ا اد ١ ظ و ب. The discovery of magnets was very important as they are used to make electric motors and generators. Things that would disappear if we had no electricity are telephones, lights, electric heat, computers, and televisions. Some uses of electromagnets: trains, car, scrap metal sorters, telephones, computers, doorbells, tape recorders etc. 29

30 Magnets around us Look at the items below and circle them if they have magnets in them. ضع دائشح ح ي االش ١ بء ا ز ف ١ ب غ ط ١ ظ Name two other items in your house that have magnets. اروش ش ١ ئب ب غ ط ١ ظ, ضع دائشح ح ي االجغب ا ز رخزشل ب ل ح ا غ ط ١ ظ Circle the things that a magnet can pull through: 30

Web الع sites for kids خ: http://www.bbc.co.uk/schools/revisewise/scien ce/physical/http www.bbc.co.uk/schools/scienceclips/ages/5_6/ pushes_pulls.

31 Web الع sites for kids خ: ce/physical/http pushes_pulls.shtml ce/physical/12_act.shtml 31

ی و ن ه ع ل ق د و م ح م ن

ی و ن ه ع ل ق د و م ح م ن ز ا ه د ا ف ت س ا ا ب ه خ ر چ و د ی ا ه ر ی س م د ا ج ی ا ت ه ج ن ا ه ف ص ا ر ه ش 3 ه ق ط ن م ر ب ا ع م ی د ن ب ت ی و ل و ا AHP ی ب ت ا ر م ه ل س ل س ل ی ل ح ت د ن ی آ ر ف ک ی ن ک ت ی ی و ن ه ع ل ق د و