Nozha Directorate of Education Form : 6 th primary Nozha Language Schools Ismailia Road Branch. Unit One Lesson (1) Types of levers

Transcription

1 Governorate Department: Science Nozha Directorate of Education Form : 6 th primary Nozha Language Schools Sheet Ismailia Road Branch A- Complete: Unit One Lesson (1) Types of levers 1- is a rigid bar that rotates around a fixed point called and is affected by. and is a fixed point that the bar rotates on. 3- Levers can be classified into types. 4- In levers of first order the. is located between the.. and the In the levers of third order, the located between the.. and the.. 6- The bottle opener and wheel barrow are levers of the.. kind, while the pliers are levers of the kind. 7- The pincers are from the levers of. class while the ice holder is from the levers of the.. class. 8- The nutcracker is a lever of.. class, while the scissors are a lever of. class. B- Choose 1- The effort lies between resistance and fulcrum in the. ( Wheel borrow pincers hammer sugar holder ). 2- Fulcrum is located between resistance and effort in the.. ( Nutcracker ice holder Scissors bottle opener ). 1

2 C- Give reason for: 1- The seesaw is a lever of first class. 2-Levers are very important in our daily life. D- Put ( ) or ( ) 1- Second class levers has a force between the resistance and the fulcrum. ( ) 2- The crowbar is an example of first class levers ( ) 3- From the functions of levers is decreasing the speed. ( ) 4- Archimedes is a Greek scientist, he is the first scientist described the lever. ( ) E- What is meant by : 1- Fulcrum. 2- Levers F- Mention three of the most important benefits of levers

3 Lesson (2) : Law of levers A- Complete: 1- The forceps are lever of the third order in which the. is longer than.. 2- Levers of second type save effort because effort arm is always.. Than resistance arm 3- The levers of first type save effort when the is longer than the. B) What happens when : 1- The force arm and the resistance arm are equal. 2- The resistance force is larger than the effort force. C) Choose 1- When the arm of force is longer than the arm of resistance, the effort force is the resistance. ( larger than smaller than equal to ) 2- The effort force and the resistance force is measured in... ( hertz Newton meter ) D- Give reason for: 1- Some times the first class levers conserve effort. 2- The force doesn't equal the resistance in the second class lever E) Write the scientific term : 1- Force its arm = resistance its arm. [.] 2- A type of levers that always conserves effort. [.] 3- The type of levers, where the effort force is always longer than the resistance force. 3 [.]

4 F) Problem : - The length of the force arm of a crowbar is 100 cm and the length of the resistance of is 15 cm. If the value of resistance equals 400 Newton, calculate the value of effort force and mention the type of lever. G) Complete the following table : Force Force arm Resistance Resistance arm

5 Unit.2 Lesson (1) : Electric energy I- Complete: 1-. is the main source of heat & light 2-. A tool that converts electric energy to light 3- The first scientist who invented the electric lamp was.. 4- The filament of the light bulb is made of, because it has high 5- The electric lamp connected to the electric circuit by.., 6- We fill the lamp with. gas to stop combustion. II- Write the Sc. Term: 1- An inert gas that is found in the glass bulb of electric lamp. [ ] 2- The most popular source of artificial light in all houses. [ ] 3- An inert gas isn't used in making the fluorescent lamp but these types of lamps are known with the gas name. [ ] 4- The part of lamp which protects the filament from burning by isolating the air [ ] 5- The lamp which has 2 filament of tungsten. [ ] III- What's the function of : 1- The filament of tungsten in the glass bulb The glass bulb in the light bulb... IV- What happens in the following cases : 1- Turning off one light bulb in an electric circuit contains many lamps connected in series One of electric lamps burns out, while it is connected in parallel with others.. 5

6 V- Write the label: VI) Look at the figure in front of you then answers : 1- In this case, the simple circuit is. thus the electric current passes through. 2- In case that any of these parts is not connected, the.. doesn't pass through the circuit. 3- Write the labels in the figure 1).. 2).. 3).. 4).. 5).. 6).. 6

7 Lesson (2) : Danger of electricity. I- complete: 1- Iron is considered as an electrical., while wood is considered as an electrical. 2- The harms of electric shock depend on. & 3- Electricity is used to lighten and. II- Mention some of important precautions when dealing with electricity ( only 3 points ) a).. b)... c)... III - Give reason for: 1- The electric heater must not be placed close to furniture or rugs. 2- Electricity can cause danger.. 3- We must place a piece of plastic in the socket. 4- Water is not used to put out electric fires. 5- You have an electric shock if you touch a source of electricity. IV- Write the scientific Term: 1- A closed path that the electric current passes in. [ ] 2- It s caused by neglected the safety precautions that have to be followed while dealing with electricity. [ ] 7

8 3- The materials that allow the electric charges to flow through them. [ ] 4- The materials that don t allow the electric charges to flow through them. [ ] V- What happens it: 1- If you touch a source of electricity which your hands. 2- A piece of glass is inserted in a closed electric circuit. 3- If we place several connections in the same socket. VI- Put ( ) or ( ) and correct the wrong one : 1) Electric shock occurs as a result of passing an electric current through human body. ( ) 2) Fires resulted from electricity are extinguished by water. ( ) 8

9 Unit Three Lesson (1) : Solar eclipse A- Complete: 1- Occurs when earth, moon and sun are nearly on one straight line with the moon in the middle. 2- hides the sunlight from us and a. Of the moon is formed. 3- There are three types of solar eclipse which are., and. 4- Doctors warn of. as its rays.. and can lead to within few minutes. 5- When the earth lies in the semi shaded area of the moon, we can see a. of the sun what's known as B- Correct the underline words : 1- In the semi-shaded area of the moon, we can see a part of the sun forming the total solar eclipse. 2- The semi- shadow is called umbra. 3- The solar eclipse always occurs at night. C- Identify the astronomical phenomena in the following figure then answer : 1- What does the figure show?.. 2- Label it. 1).. 2).. 3).. 4).. 9

10 Lesson (2) : The lunar eclipse A- Complete: 1- Lunar eclipse occurs when earth hides.. or apart of it from moon at a rate of.. lunar eclipses per year. 2- When the earth comes between moon and sun, lunar eclipse will be. 3- The lunar eclipse becomes if the moon falls in the penumbra area. 4- There are two types of lunar eclipse which are.. and 5- The lunar eclipse occurs in of lunar month. 6- We can see.. when the sun is behind the horizon at night, where always occurs at the morning. 7- Solar eclipse does not last more than. minutes and.. Seconds, whereas the duration of.. eclipse last for more than two hours. 8- The color of the moon tends to be.. during the start of the lunar eclipse. B- Put ( ) or ( ) 1- Two phenomena of lunar and solar eclipse are repeated regularly and can be predicted. ( ) 2- When the cone shadow doesn t reach earth surface so annular solar eclipse can be observed. ( ) 3- We can observe the lunar eclipse with naked eye. ( ) 4- The lunar eclipse occurs in the morning. ( ) 5- The time of solar eclipse is less than the time of lunar eclipse. ( ) C- What happen when : 1) The moon comes in an orbit higher from earth.... 2)The moon enters the earth's umbra. 10

11 D- Write the scientific term : 1- Rays that can't be absorbed from above the atmosphere to the earth, that causes red color of the moon in the start of lunar eclipse. [ ] 2- The Earth's shadow in which total lunar eclipse is formed. [ ] E- Correct the underlined word : 1) Lunar eclipse occurs in the middle of the lunar month two times a month. 2) The phenomenon of the lunar eclipse occurs in the end of the lunar month 3) The solar eclipse occurs when the earth comes between the moon and the sun. F- The following figure represents an astronomical phenomenon : 1- What's the name of this phenomenon?.. 2- Label the figure : 1) 2) 3).. 11

12 Lesson (3) Observing space A- Complete : 1-..was the first scientist who made astronomical telescope by himself in Earth is from.. planets, while Jupiter is from the.. planets 3- The length of Hubble telescope is Our galaxy is called.. and it has a shape. 5- Places where astronomers work and where..are kept in side are called.. 6- Hubble telescope uses. to collect light. B- Write the scientific term : 1) A celestial system consists of 200 billion stars. [ ] 2) The most famous space monitoring telescope. [ ] 3) The first satellite that was launched successfully in an orbit around the earth [ ] C- Define : Telescope D- Choose the correct answer : 1- Galileo used. To make his telescope. a- mirrors b- lenses c- aluminum 2- All the following are from the huge gaseous planets except.. a- Venus b- Neptune c- Saturn d- Uranus 3- We can study the stars by looking at them using. a- telescope b- microscope c- naked eyes 12

13 Unit. 4 I- Complete: 1- The plants takes..,.. from the air,.... From the soil, with the presence of light, then plant forms its food by the.. process. 2- Absorbing minerals & water from the soil occurs by. in the root. 3- The root systems composed of. &. 4- The root hair extend from the. and is lined from in side with a thin layer of.. 5- In the plant water passes into tissue of.. where..the juice is raised to reach the stem of plant and leaves, then the other. 6- the process of allowing some salts to pass according to the plants need is called The vital process by which the plant gets rid of water is called II Write Scientific Term: 1- It fixes the plant in soil and prevent the soil erosion. [ ] 2- Cells in plant root which regulates water crossing into a xylem tissue. [ ] 3- The openings in the plant leaves to get rid of water in the form of water vapor [ ] 4- The two cells which surround the stomata. [ ] 5- A process contributes in water and dissolved substance transmission to top of the plant. [ ] 6- The transfer of water from high concentration area to low concentration area through semi permeable membrane. [ ] 13

14 III- Give reason for : 1- The root system in plant is subdivided and extended through soil particles Stomata are very important for plant Root hair has a concentrated solution more than the soil solution The age of root hair doesn't exceed few days The root hair secretes sticky substance The root hairs are of thin walls... IV- What happens if : 1- The root hair doesn t secrete sticky substance. 2- The leaves don t have stomata. 3- The plant doesn t make photosynthesis. 14

15 Cairo Governorate Nozha Directorate of Education Nozha Language Schools Ismailia Road Class Serial ٢٠ Subject: Science Form : 6 th Primary Mid Term Exam. March, 2012 اسم التلميذ /... 1 st Question : A) Complete the following statements: and. from the dangers 10 Marks of electricity. 2- is an example of the first class levers while is an example of the second class levers. 3- The fluorescent glass tube contains. gas and a little of. B) Match from column ( B ) what is suitable for column ( A ) :- ( A ) ( B ) 1- Lever 2- Electric load 3- Electric current 4- Solar eclipse a- is a flow of electric charges through a conductor. b- occurs when the moon is located between sun and Earth on one straight line. c- occurs by connecting more than one machine to one socket. d- is a rigid bar that rotates around a fixed point. 2 nd Question : A) Write the scientific term:- 10 Marks 1- The main source of light. [..] 2- The materials that don t allow the flow of electricity through it.[...] 3- A type of solar eclipse is formed in the shadow area of the moon in which the sun can t bee seen completely. [..] 4- Levers that have the force between the resistance and the fixed point. [..] B ) Correct the underlined words:- 1- The base of the light bulb has a piece of glass for connection. 2- The annular solar eclipse occurs when the moon lies in the lower orbit from the Earth in front of the sun. 3- The manual broom is considered as a second class lever. 4- To avoid danger of electricity, we have to insert a metal object in the socket. 15

16 3 rd Question : A) Choose the correct answer:- 10 Marks 1- The inner tube surface of the fluorescent lamp is covered with. material. a- neon b- lead c- copper d- phosphoric 2-.. is good conductor of electricity. a- Iron b- Glass c- Wood d- Plastic 3- If the resistance arm is longer than the force arm, the resistance will be.. than the effort force. a- smaller b- larger c- equals d- a and c 4- The moon revolves around the Earth in. orbit. a- circular b- oval c- rectangular d- spherical B) Give reason for : 1- The second class levers conserve the effort. 2- It is preferred to connect the lamps at home in parallel. C) What is the importance of : 1- Special glasses during observing the solar eclipse. 4 th Question : A) Put ( ) or ( ) :- 10 Marks 1- The electric chock happens when the body is a part of an opened electric circuit.( ) 2- The solar eclipse phenomenon doesn t last more than 14 minutes and 7 seconds.( ) 3- The semi-shadow area is called umbra. ( ) 4- The force and the resistance can be equal only in the second class lever. ( ) B) If the effort force equals 20 Newton and length of its arm is 100 cm. Calculate the value of the resistance if the length of the resistance arm is 50 cm C) Write the labels : Good Luck