Science Primary /2018. Teacher's Name:... Name :. Work Sheets SE C O N D T E R M

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1 The Vision of the School :Distinct Environment for Refined Education Work Sheets SE C O N D Science Primary /2018 Teacher's Name:... Name :. Class : T E R M -0-

2 Unit 1 : Force and Motion Lesson 1 : Types of levers [1] What the difference between each of the following: (one point) 1-3 rd class lever and 2 nd lever st class lever and 3 rd class lever.. [2] Give reason for each of the following:- 1- In the 2 nd class lever the force is always less than the resistance The levers are very important to our life... [3] Choose the correct answer:- 1- is a lever from the 3 rd class. a) Sweet holder b) nutcrackers c) scissors 2- Wheel barrow is considered as.. lever. a) First b) second c) third 3- All the following are the functions for lever except a) Saving effort b) increasing force c) decreasing speed -1-

3 [4] Complete:- 1- The nutcracker is an example of the.. levers. 2- Levers which make tasks perform more easily by means of,.. and. 3- The fish hook is considered a class lever but the crowbar is considered a. class lever. [5] Write the scientific term:- 1- Levers that have the resistance between the force and the fixed point. (..) 2- The fixed point of rigid bar (..) 3- A rigid bar rotates on a fixed point and is affected by a force and the resistance. (..) [6] What is the meant by : 1- Fulcrum : Levers :. -2-

4 Lesson 2 : Law of levers [1] Complete:- 1- The law of levers states that. 2- The type of levers that always conserves effort is. 3- The levers of first type save effort when the is longer than the. [2]A) If you know that the length of the force arm in one of the levers 40cm., the length of the resistance arm is 60cm., Calculate value of the resistance that regains the balance of the lever given that value of the affecting force is 480 Newton and mention the type of lever. B) The length of the force arm of a crowbar is 50 cm. and the length the resistance of is 10 cm. if the value of resistance equal 300 Newton, Calculate the value of effort force and mention in the type of lever. [5] What happens if:- 1- The force arm and resistance arm are equal. 2- There would not be levers. 3- The resistance arm is longer than the effort force. -3-

5 Unit two :Electric Energy Lesson 1 :The Electric Lamps [1] Complete:- 1- Thomas Alpha Edison is an American inventor that invented the. 2- The light bulb consists of..,. and. 3- The fluorescent lamp contains. gas [2]Write the scientific term:- 1- A way in which the light bulb is connected one after the other and the light intensity of the bulbs decreases with the increase in their number. (..) 2- The materials that the filament of light bulb made from. (..) 3- The gas that the light bulb contain. (..) [3] What is the function of:- 1- The filament of tungsten in the glass bulb. -4-

6 [4] What happens:- 1- One of electric lamps burns out, while it is connected in parallel with others.. 2- The tungsten filament of the light bulb is replaced with copper The electric lamps are connected in series in our house... [5] Compare between Light bulb and fluorescent lamp with respect to structures Light bulb fluorescent lamp [6] Mention of one function for florescent lamps. -5-

7 [1]What would happen if:- Unit two : Lesson 2 :Dangers of Electricity 1- The electric fire is put out by water. 2- You insert a metal bar in an electric socket. 3- The spark resulting from the electric fire touches any part of the body. 4- The place the electric heater too close to furniture. [2] Complete:- 1- The simple electric circuit consists of..,.. and and are examples of materials that are electric conductors. 3- You cannot put the electric fire with water because water is.. 4- The.. leads to the destroying of the body tissues 5- The electric shock occurs as a result of passing through the human body isone of the causes of the burns resulting from the electricity. -6-

8 [3] Write the Scientific term :- 1- Fires occur as a result of the increase in the temperature of the electric machines. (..) 2- One of the dangers of electricity is causing the damage of the tissues of the body. (..) 3- One of the dangers of electricity occurs as a result of the passage of the electric current to the human body. (..) 4- They are the materials than don't allow the flow of electricity through it. (..) [4] Put ( ) or ( ) and correct the wrong one:- 1- All materials are conductors of electricity. () 2- We can put out the electric fire with water. () 3- We can touch the electric machines that are connected to the electric current with a wet hand. ( ) 4- Iron bar is a good conductor material of electricity. ( ) [5] Mention some of important precautions dealing with electricity [2 point] [6] What happens:- 1- If we place several connection in the same socket. -7-

9 [1] Complete:- Unit Three : The universe Lesson 1 :The solar eclipse 1- Types of Solar eclipse are,.. and 2- An solar eclipse is formed when the moon is located in an orbit higher than the earth. 3- The solar eclipse occurs when,.. and. are nearly on one straight line with the.. in the middle. 4- The solar eclipse is formed in the. area of the moon, we can see a. of the sun. [2] Write the scientific term:- 1- The phenomenon that occurs when the earth, the moon and the moon and the sun are nearly on one straight line with the moon in the middle. (.) 2- The eclipse that is formed in the semi-shaded area of the moon. (.) 3- The eclipse that occurs when the moon comes in an orbit higher from Earth. (.) 4- A dark body that revolves around the earth in a specific orbit. (.) -8-

10 [3] Give reason:- 1- We should not look directly at the sun with the naked eye?.. 2- We can not see the sun completely during the total eclipse?.. 3- The type of solar eclipse differs according to the movement of the moon in front of the sun. [4] What happens when:- 1- The moon hides a part of sun from the Earth's surface... [5] Mention one difference between :- 1- Total solar eclipse and partial solar eclipse

11 [1] Complete:- Unit Three : Lesson 2 :Lunar eclipse 1- The phenomenon of the lunar eclipse occurs in the of the lunar month. 2- Types of lunar eclipse are. and 3- The color of the moon tends to be.. during the start the.. lunar eclipse. 4- When the whole moon enters the shadow area of Earth, a. occurs. 5- When a part of the moon enters the shadow area of the earth, a... occurs. [2] Write the scientific term:- 1- It occurs when the earth comes between the moon and the sun on one straight line. ( ) 2- It occurs when the moon enters the shadow area of the Earth. ( ) 3- It occurs when a part of the moon enters the shadow of the earth. ( ) 4- The phenomenon that can be seen from any place on Earth when the sun is behind the horizon at night. ( ) -10-

12 [3] Put ( ) or ( ):- 1- Although the two phenomena of lunar and solar eclipses attract people's attention, they do not affect life on earth. ( ) 2- The two phenomena of lunar and solar eclipses are repeated regularly and can be predicted. ( ) [4] What happen when :- 1- The moon comes in an orbit higher from earth. 2- The moon enters the earth's umbra. [5] Correct the underlined word:- 1- Solar eclipse occurs when the earth comes between the moon and the sun. 2- The phenomena of the lunar eclipse occurs in the end of the lunar month. 3- The moon is coloured in blue at the start of total lunar eclips. -11-

13 Unit four: Lesson 1 : Absorption and transmission of water and salts in plants [1] Write the scientific concept:- 1- Biological process through which plants lose water in the form of vapour. ( ) 2- A structure in plant, water passes through it from root to stem to leaves. ( ) 3- Two cells inside a leaf stoma. ( ) 4- Transmission of water molecules through a semi permeable membrane from an area with a high concentration of water to an area with a low concentration of water. ( ) 5- A structure extends from root wall which absorbs water ( ) [2] Choose:- 1- Stomata are wide spreading on a) Stem b) leaf upper surface c) leaf lower surface 2- Root hair absorbs water by. a) Swallowing b) Osmosis c)voluntarily feature 3- Root hair wall is. a) Thick b) thin c) average 4- Root hair has a. age. a) Short b) average c) long 5- Plant loses water in a form of water vapourin. a) Photosynthesis b) Transpiration c) Evaporation -12-

14 [3] Put ( ) or ( ):- 1- Respiration process contributes in water and dissolved substances transmission to the top of the plant. ( ) 2- Plant stomata are surrounded by two woody cells. ( ) 3- Root hairs secrete solid substances which help in water absorption. ( ) 4- Plant loses water in the form of water vapour in photosynthesis ( ) 5- Stem extends and penetrates in the soil to increase the absorption surface ( ) [4] What happens if:- 1- The root hair doesn't secrete sticky substance. 2- The leaves don't have stomata. [5] Give reasons:- 1- The root hairs are thin walls?. 2- Presence of holes in the lower surface of plant leaves.. [6] What is the meaning of :- 1- Osmosis:. [7] Mention one function for the two guard cells. -13-

15 Practical Science Second term 2017 /

16 Practical Science Lesson (1) Type of Levers Classify the following tools according to the type of lever:- 1) 2). 3). 4). The Answer: 1- First class lever 2- Second class lever 3- First class lever 4- Third class lever -15-

17 Practical Science Electric energy Unit (2) The Electric Lamps The structure of the light bulb:- Label the following diagram: The Answer:- 1- Tungsten filament 2- Argon gas 3- Glass bulb 4- Base of lamp 5- A piece of lead - In the following figure there are 2 electric circuit (A) and (B) mention the way in which light bulb is connected in each circuit (A) and (B) B A -16-

18 The answer:- 1- Light bulb 2- Electric wire 3- The positive pole 4- Battery -17-

19 Unit (2) Lesson (2) Practical Science Dangers of electricity and how to deal with it Classify the following into electric conductors insulators andelectric [key nail coin plastic button small piece of cloth, eraser] Electric Conductors Electric Insulators The Answer:- Electric Conductors - key - nail - coin Electric Insulators - Plastic button - Small piece of cloth, - eraser -18-

20 Science Practical Unit (3) : Lesson (1) The solar eclipse Examine the opposite figure, then answer A) Label the figure: B) Write the name of this phenomenon :-. The Answer:- A) 1- The sun 2- The moon 3- Shadow area (umbra) 4- Semi-shadow (The Penumbra) 5- Ant umbra B) Solar eclips -19-

21 Practical Science Unit (3) Lesson (1) * Look at the opposite figure represents lunar eclipse phenomenon observe it then answer: A) The type of lunar eclipse is. B) Label the figure [2] The figure represents the phenomenon. The Answer:- A) Total lunar eclipse B) 1- Moon's orbit 2- Earth's orbit 3- semi shadow (Penumbra) 4- Shadow area(umbra) -20-

22 Unit (4) Practical Science Lesson (1) Structure and Function of living organisms Identify the opposite figure write the label on the figure: The Answer:- 1- Cortex 2- Epidermis 3- Endodermis 4- Xylem 5- Pith 6- Root system 7- Root hair -21-

23 Lesson (2) (A) (B) Look at the opposite figure that show the structure of. A) Label the figure B) Figure (A) represents.. While figure (b) re represents

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28 Model Answer For science book Primary 6 Second term 2017 /

29 Unit One : Lesson (1) Type of Levers Exercise P.10 1) Write the scientific Term a) Fulcrum b) Lever c) First class lever d) Third class lever e) Second class lever 2) Complete the following sentences:- a) Increase the distance increase the speed increase the force. b) First third c) Crowbar scissors d) Wheelbarrow bottle opener e) Manual broom sweat holder 3) Classify the following tools according to the type of lever:- a) First class lever b) Second class lever c) Third class lever d) Second class lever e) Second class lever 4) Complete the following diagram:- a) The effort force between the resistance force and the fixed point. Examples: (the fish hook the manual broom the sweat holder) b) The resistance force between the effort force and fulcrum. Examples :(the soda water opener the wheel barrow ) c) Examples the first class lever : The scissors the crowbar the see saw Lesson (2) Low of levers 1) Complete the following sentences: a) Force X its arm = resistance X its arm b) Second third c) Force arm resistance arm d) Force arm equal resistance arm -28-

30 2) Explain the following : a) Bec. force arm is always longer than resistance arm b) Bec. force arm is always shorter than resistance arm c) Bec. in the first class lever the fulcrum found in the middle between force and resistance d) Bec. this levers help to increase the distance or speed or accuracy or avoid risks. 3) Determine which of the following levers conserve the effort-give reason for your answer:- a) The lever that save effort is lever (a) because force arm is taller than resistance arm Butlever (b) does not save effort because force arm is shorter than resistance arm. 4) Force X its arm = resistance X its arm = 200 resistance arm Resistance arm = = 50 cm. 200 Unit (1) 1) Match column (A) with its correspondence in column (B) :- a) First class levers (levers that sometimes conserve the effort) b) Second class levers (levers that always conserve the effort) c) Third class levers (levers do not conserve the effort) d) The levers (A rigid bar rotates around a focal point and is affected by a force and a resistance). e) The fulcrum (fixed point that a rigid bar sits on). 2) Put ( ) or ( ) and correct the false ones:- a) ( ) second b) ( ) third c) ( ) first d) ( ) e) ( ) taller 3) Complete: a) Second class b) Third class c) First class d) Resistance X its arm e) First class lever -29-

31 4) Compare between the three types of levers:- Point of First class lever Second class lever Third class lever comparison Force between Fulcrum between Resistance between Definition fulcrum and force and resistance fulcrum and force resistance Conservation of effort Examples Sometimes conserve the effort - Crowbar - Scissors Conserve the effort Wheel barrow nutcracker Not conserve the effort Manual broom sweat holder 5) Classify the following machines according to the lever:- 1- Third class lever 2- First class lever 3- Second class lever 4- Third class lever 5- First class lever 6- Second class lever 6) Force its arm = resistance its arm = 1000 resistance arm Resistance arm = = 10 cm 7) Force its arm = resistance its arm Force 5 = Force = = 900 Newton Exercises:- (P. 35) Unit two Lesson (1) The Electric Lamps 1- Complete the following sentences :- a) Light bulb fluorescent lamp b) Tungsten melting point c) Filament of tungsten glass bulb the base of the light bulb. d) Inert Argon gas 2- Write the scientific term for each of the following: a) Connecting in series b) Electric lamp c) Connecting in parallel -30-

32 3- What happens if:- a) It does not give light like tungsten b) The tungsten filament will burning c) All the lamp of the house would have turned off when one lamp is damaged or when turned off. 4- Write a scientific explanation for each of the following:- a) To connect the electricity to the lamp b) To avoid all the lamp of the house not to turn off when one lamp is damaged or one lamp is turned off. c) Because it has high melting point which results that it does not burn at high temperature. Lesson (2) Dangers of electricity and How to deal with it. 1- Complete the following sentences:(p. 44, 45) a) Metal coins metal keys b) Wood plastic paper c) The fires the electric chock the burns. d) The burns e) Conducting electricity f) Electricity shock fuel spark g) Electric current h) Do not place several connections in the same socket. Don't leave the wires naked and not insulated. i) Touching spark touching an electric machine that generates heat as heater iron. 2- What would happen if :- a) Electric shock occurs. b) Electric fire occurs. c) Electric burn occurs d) Electric shock occurs e) The fire increases -31-

33 3- Write the scientific term for each of the following:- a) The electric shock b) The fires resulting from electric current c) Electric burns. 4- Complete the following diagram: A) Uses of electricity:- 1- To cook food and preserve it cold 2- Light our houses, street and factories 3- Operating machines B) Dangers of electricity:- 1- Fires resulting from electricity 2- The electric shock 3- The burns resulting from the electric current C) Precaution in dealing electricity:- 1- Do not place several connections in the same socket 2- Do not touch the electric machines with wet hand 3- Do not leave the wire necked and not insulated. Unit (2) Test: (P. 48, 49) 1- Complete the following sentences a) Connecting in series in parallel b) Don't touch electric machines that are connected to the electric current with wet hand, do not place several connections in the same socket. c) Battery lamp connecting wire d) Wood plastic rubber e) Series -32-

34 2- Correct the underlined in the following sentences:- a) Light b) Tungsten c) In series d) Florescent e) Electric shock f) In parallel g) In parallel h) Argon i) Copper 3- Write a scientific explanation to each of the following:- a) To avoid burning of tungsten filament. b) To avoid electric shock. c) To connect electricity to the lamp. d) To prevent the occurrence of fires. [4] Compare between :- A) Series connection of lamp 1- The light bulbs are connected one after another. 2- There is one route only for the electric current to pass through in the electric circuit 3- When one of the light bulbs damages all the other lamps will turn off. B) Parallel connection of lamp 1- The light bulbs are connected in branching. 2- There are more than one route for the electric current to pass through in the electric circuit. 3- When one of light bulbs damages the other lamp are not affected. The structure of light bulbs It consists of tungsten filament glass bulb the base of lamp C) The structure of fluorescent It consists of glass tube (the inner tube surface is covered with a phosphoric material) - Two filaments of tungsten - Two points of connection on each tip of the lamp. Conducting material They are materials that allow the electric current to pass through them Examples: (iron copper ) -33- Non-conducting material They are materials that don't allow the electric current to pass through them. Example : (wood plastic )

35 [5] Write the scientific term:- a) good conductor of electricity b) electric fire c) bad conductor of electricity d) connecting in series e) Electric lamp f) connecting in parallel g) electric shock h) electric burns Unit (3) Lesson (1) The Solar Eclipse Exercises P. 58, The first case is considered a partial solar eclipse because we can see the part of the sun. The second case is considered an annular solar eclipse because the sun appears as lighting rings. 2- The cone shadow (umbra) and penumbra, because the earth, the moon and the sun are located on one straight line with the moon in the middle. 3- a) Because the ultraviolet ray and infrared ray harm the eye and can cause blindness. b) Because the moon size appears smaller to that of the sun so the sun appears as a lighted ring. c) Because during the moon s trip lighted in front of the sun ray it hides a part or all the sun disk. 4- a) Partial eclipse occurs when the earth s surface is in the penumbra of the moon and the moon in a higher orbit from the earth. b) Annular eclipse occurs when the earth s surface in the antumbra of the moon. c) Total eclipse occurs when the earth is in the umbra of the moon. d) Solar eclipse occurs when the earth, the moon and the sun are nearly on one straight line with the moon in the middle. Lesson (2) The Lunar Eclipse Exercises P. 65 Points of comparison Solar eclipse Lunar eclipse 1- Time of occurrence 2- How does it occur? 3- Its duration 4- Safety precautions Seen at morning When the moon comes between the earth and the sun on one straight line. Seven minutes and few second Requires precautions such as special glasses -34- Seen at night When the earth comes between the moon and the sun on one straight line. More than two hours Doesn t require precautions because it doesn t harm to eye

36 [3] Put ( ) or ( ) and give reason:- 1- ( ) because they are two natural phenomena that occur as a result of the moon s rotation around the earth and both of the and the earth moon rotation around the sun. 2- ( ) because the moon and the earth revolve in regular and fixed orbit and the scientists can calculate the time of earth s rotation and the moon rotation in the space. 3- Draw a diagram of lunar eclipse P Because the earth is greater in size than the moon. 5- a) Partial lunar eclipse occurs when: a part of the moon enters the shadow area (umbra) of the earth. b) Total lunar eclipse occurs when: The whole moon enters the shadow area (umbra) of the earth. c) Lunar eclipse occurs when the earth comes between the sun and moon on one straight line. Unit (3) Test Exercises P a) Because ultraviolet ray and infrared ray harm the eye and it can lead to blindness. b) Because the moon hides all or a part of light when passing in front of the sun disk. c) Because the earth is greater in size than the moon. d) Because the vision is clearer due to the clear atmosphere. e) To explore outer space. f) Because the moon hides the sun disk completely. 2- a) Solar eclipse moon b) Lunar eclipse earth c) Telescopes observatories d) Annular 3- a) ( ) b) ( ) Galileo c) ( ) d) ( ) e) ( ) 4- a) It is the dark inner shadow in which the total solar eclipse appears. b) It is faint outer shadow in which the partial solar eclipse appears. c) It is the type of solar eclipse in which we can t see the sun completely and it is formed in the shadow area (umbra) of the moon. d) It is the type of solar eclipse in which we can see a part of the sun and it is formed in the semi-shaded area (penumbra) of the moon. e) It is the type of solar eclipse in which the sun appears as a lighting ring and it is formed when the moon is higher orbit from the Earth. f) It is the lunar eclipse which occurs when the whole moon enters the shadow area (umbra)of the Earth. -35-

37 5- a) Between solar and lunar eclipse b) Between total and annular solar eclipses:- C) Between observing space from:- The earth's surface By using telescopes 6- a) Telescopes b) Total lunar eclipse c) Partial lunar eclipse d) Lunar eclipse -36- Outside the earth By using space telescope carried on satellites and space stations. Unit (4) Absorption and Transmission of water and mineral salts in plants Exercises P. 84, Choose: a) (3) b) (2) c) (1) d) (2) e) (2)

38 2- a) The osmosis b) The root hair c) The transpiration d) Xylem (wood) e) The two guard cells 3- Experiment in book P a) The transpiration b) The root hair c) Sticky substance d) The transpiration e) The two guard cells 5-1) Cortex 2) Epidermis 3) Endodermis 4) Xylem Pith Root hair Root system 6- A) Transpiration: It is the losing of water in the form of vapour from the leaves or from other green part to its surroundings through holes in plant leaves called stomata. B) The Osmosis feature:- It is the transmission of water molecules through semi-permeable membrane from the area with high concentration of water to an area of low concentration of water. Unit (4) Test P. 88, Choose the correct answer:- a) (1) b) (3) c) (3) 2- a) Transpiration b) Osmosis c) Root hair d) Two guard cells 3- a) (x) Root hair b) (x) Transpiration c) (x) Stomata 4- (b) -37-

39 5- A) Transpiration:- The loss of water in the form of vapour from the leaves or other parts of plants. B) Osmosis: It is the transfer of water molecule during a semi-permeable membrane from an area of high concentration of water to area of low concentration of water. -38-

40 St. Fatima Lang. School Heliopolis Name: Mid - Term Exam 2015 Answer the following questions:- [1] A) Choose the correct answer:- Form:6 th Primary Subject: Science Class: 1- The force is between the resistance and fulcrum in. a) Nutcrackers b) scissors c) sweat holder 2- Which gas of the following gasses is found in the florescent lamp but not in electric bulb a) neon b) argon c) mercury vapour 3-. Is considered from the second class levers. a) fish hook b) see saw c) nutcracker B)What happen in each of the following cases:- 1- The electric lamps are connected in series in our houses The force arm is longer than the resistance arm. [2]A) Complete the following statements:- 1- is considered as one of the first simple machines which invented in the past. 2- The scientist.. who invented the light bulb. 3- The simple electric circuit consist of,. and B)Write the scientific term:- 1- Materials allowing the electric current passing through it. (..) 2- The fixed point of a rigid bar. (..) -39-

41 [3] A) Give reason:- a) The levers are very important to our life. b) Water cannot be used to turn off the electric burns. c) The second class levers conserve effort. B) Compare between 3 rd class lever and 1 st class lever. [Two point only] 1 st class lever 3 rd class lever [4]A) The length of the force arm of a crowbar is 50 cm and the length of resistance is 10 cm. if the value of resistance equal 300 Newton. Calculate the value of effort force and mention in the type of lever... B) Correct the underlined words in the following:- 1- There are two connecting points at each end of the light bulb ends.. 2- The electric fire occurs due to the passage of the electric current though the human body.. 3- Coal holder is a first class lever.. Best of Luck -40-

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