Name: ……………………….
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Class: …………..............
Primary 6 Science
Midterm Revision sheet
Q1: Write the scientific term:
1. A rigid bar, straight or curved, rotates on a fixed point, and is affected by a force and
resistance.
[…………..……….……]
2. The fixed point on which a rigid bar rotates.
[……….…....…….……]
3. Levers that have the fixed point between the force and resistance. […………….….….……]
4. Levers that have the force between the resistance and fixed point. […………..……….……]
5. Levers that have the resistance between the force and fixed point. […………………...……]
6. A type of levers that has the effort between fulcrum and resistance force.
[…………….….……….]
7. Levers where the resistance lies between effort force and fulcrum. [………………………...]
8. The type of levers in which the force arm can be equal to the resistance arm.
[……….……..………….]
9. Force x its arm = Resistance x its arm.
[…………….……………]
10. The distance between the effort force and the fulcrum.
[…………….……………]
11. The distance between the resistance and the fulcrum.
[……………….…………]
12. The measuring unit of the effort force and resistance.
[……………….…………]
13. The measuring unit of effort arm and resistance arm.
[……………….…………]
14. It's a method of connecting electric lamps parallel to each other and electricity has different
routes to flow through.
[………………………..]
15. It's a method of connecting electric lamps one after another and electricity flows in one
path.
[………………….……..]
16. A type of lamps that contains mercury vapor.
[……….……….……….]
17. A way in which the light bulbs are connected one after another and the light intensity
decreases by increasing number of bulbs.
[………….….….………]
18. Means of converting electric energy to the light energy.
[……………….….….…]
19. The flow of electric charges through material conducting electricity. [……….………….……]
20. A coiled thin wire made from tungsten.
[…………….……..……]
21. An inactive gas used in electric lamps to protect the filament from burning.
[…………….……..……]
22. A closed path where an electric current pass making a complete cycle.
[….…………….….……]
23. The way where the bulbs are connected by branching routes and the lightening of the
lamps is not affected with the increase in their number.
[…………….…..………]
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Q2: Complete the following statements:
1. The tweezers is a ……….…..class lever while scissors is from ……….. class levers.
2. In the wheel barrow, the ………………….lies between the effort and the fulcrum.
3. In the manual broom, the ……………….lies between the resistance and the fulcrum.
4. In first class levers, the …………………lies between……………….and effort force.
5. Nutcracker is a …………......lever, while the pliers is a……………….lever.
6. …………..is an example of the first class levers, while…………….… is a second class lever.
7. Scissors and seesaw swing are ……………………class……….…………
8. Second class levers save effort because its effort arm is …….…………than the resistance
arm.
9. Third class levers don't save effort because the effort arm is ……….…………than the
resistance arm.
10. Levers make the job easier to do through………….….…………….…..and……..…..…………..…….
11. Among functions of lever is to avoid……………………… as in……………………
12. Tweezers are used in picking up………………………objects
13. The Hockey increases the…………..…. of the ball, while manual broom is used to increase
……………….of the force and move it from one place to another.
14. The crow bar is considered a ….…….……… class lever, while ………………..is third class lever.
15. Some levers save …………….…..through using small force to move a big load as in the
crowbar.
16. The second class levers always save effort because the force arm is ……….………than the
resistance arm.
17. If the arm of force is longer than the arm of resistance, then the force is ………………… than
the resistance.
18. ……………….class levers always save effort, while ……………..class levers never save.
19. The filament of the light bulb is made of …………………...
20. When several lamps connected in ………………, the electric intensity doesn't change.
21. The filament of the light bulb is made of …………………...
22. If one of the lamps connected in ………………….. is burnt out, the other lamps turn off.
Prim6_2nd Midterm Revision Sheet_2016
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Q3: Correct the underlined word:
1. The tweezers is a second class lever.
[…….……….…………]
2. The scissors is a second class lever.
[…….……….…………]
3. The coal holder is used to avoid speed.
[…….……….…………]
4. The manual broom is used to increase force.
[…….……….…………]
5. All first class levers save effort.
[…….……….…………]
6. All first class levers don't save effort.
[…….……….…………]
7. Wheel barrow is a third class lever.
[…….……….…………]
8. The manual broom works on increasing force.
[…….……….…………]
9. The bottle opener is a third class lever.
[…….……….…………]
10. In third class lever the resistance lies between fulcrum and resistance.[…………….…………]
11. Third class levers are most popular levers used in our daily life.
[…….……….…………]
12. Scissors and pliers are examples of third class levers.
[…….……….…………]
13. First class levers always save effort.
[…….……….…………]
14. Second class levers don’t save effort.
[…….……….…………]
15. The force arm is always longer than resistance arm in first class levers[…….……….…………]
16. The distance between fulcrum and effort force is called the resistance arm of lever.
[…….……….…………]
17. Some of the second class levers save effort.
[…….……….…………]
18. First class levers never conserve effort.
[…….……….…………]
19. There are two points of connection from inside on both tips of the lamp. [...……….…………]
20. Electric lamps change electric energy into chemical energy.
[…….……….…………]
21. The glass bulb of electric lamp contains an active gas.
[…….……….…………]
22. Fluorescent lamps contain neon gas.
[…….……….…………]
23. The filament in electric lamps is made from copper.
[…….……….…………]
24. Lamps in commercial stores are connected in series.
[…….……….…………]
25. When connecting several lamps in series the light intensity increases. […….……….…………]
26. If one lamp is broken in the house, the rest of the lamps turn off.
[…….……….…………]
27. Decorative lamps in festivals are connected in series.
[…….……….…………]
28. There is/are two tungsten filaments at each end of the fluorescent lamp. […….…….…………]
29. There are three connecting points at each end of the fluorescent lamp. […….……….…………]
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Q4: Choose the correct answer:
1. The resistance is between the force and fulcrum in the …….
a. Nutcracker
b. scissors
c. sweet holder
2. The force is between the resistance and fulcrum in the …….
a. Nutcracker
b. scissors
c. sweet holder
3. The 2nd Class levers………….save effort.
a. Always
b. sometimes
c. never
4. In 3rd Class lever the force arm is …………the resistance arm.
a. Longer
b. shorter
c. equal to
5. The Levers of 1st Class …………… save effort.
a. Always
b. sometimes
c. never
6. The force arm of the ………… levers is longer than the resistance arm.
a. 1st class
b. 2nd class
c. 3rd class
7. One of the following levers transfer force from one place to another…………
a. Manual broom
b. nutcracker
c. wheelbarrow
8. All of the following levers are third class levers except…………….
a. Wheel barrow
b. fishing rod
c. sweet holder
9. ………..is considered from third class levers.
a. Fish hook
b. see-saw
c. nutcracker
10. In ………… class levers, the resistance lies between fulcrum and effort force.
a. First
b. Second
c. Third
11. The effort lies between fulcrum and resistance in ……………..class levers
a. First
b. Second
c. Third
12. The force and the resistance are equal in some levers of…………………
a. First
b. Second
c. Third
13. The filament is made from Tungsten because it has a ….…………… point.
a. High boiling
b. High melting
c. Low melting
14. One of the following gases is found in the fluorescent lamp but not in the electric bulb..
a. neon
b. Argon
c. mercury vapor
15. Fluorescent lamps contains argon gas and a little of ………………………..
a. Hydrogen gas
Prim6_2nd Midterm Revision Sheet_2016
b. mercury vapor
c. atmospheric air.
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16. The fluorescent lamp is covered from inside with ………………………..substance.
a. golden
b. phosphoric
c. oily
17. When increasing the number of lamps connected in series, the light intensity……....
a. Decreases
b. increases
c. doesn't change
18. When removing one of the lamps connected in parallel with other lamps, the light intensity…..
a. decreases
b. increases
c. doesn't change
19. When disconnecting an electric lamp from a series connection, the rest of the lamps…………
a. Stay lighting
b. turn off
c. make a spark.
Q5: Solve the problem:
1- A lever is affected by a force of 150 Newton, a resistance of 300 Newton and the effort
force arm was 20 cm. Calculate the resistance arm.
…………………………………………………………………………………………………………………………………
…………………………………………………………………………………………………………………………………
…………………………………………………………………………………………………………………………………
2- A lever is affected by a force of 50 Newton and its force arm is 20 cm. Given that the
resistance arm is 5 cm, calculate the resistance force
…………………………………………………………………………………………………………………………………
…………………………………………………………………………………………………………………………………
…………………………………………………………………………………………………………………………………
3- The exerted force equals 500 Newton and length of its arm is 20 cm and is affected by
resistance with a value of 200 Newton. Find the value of the arm of the resistance.
…………………………………………………………………………………………………………………………………
…………………………………………………………………………………………………………………………………
…………………………………………………………………………………………………………………………………
4- The arm length of a third class lever is 5 cm and the length of the arm of the resistance is
15 cm. if the resistance has a value of 300 Newton , calculate the value of the affecting
force .
………………………………………………………………………...........................................................
…………………………………………………………………………………………………………………………………
………………………………………………………………….................................................................
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Prim 6 Science
Mid Term Revision Sheet
Part (2)
Q6: Give reason:
1- In the 2nd class lever the force is always less than the resistance.
………………………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………………..
2- Third class lever don’t save effort.
……………………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………………
3- In some of the first class levers, the effort force is equal to resistance force.
…………………………………………………………………………………………………………………………….
……………………………………………………………………………………………………………………………
4- In 2nd class levers the effort doesn’t equal to resistance.
……………………………………………………………………………………………………………………………
…………………………………………………………………………………………………………………………….
5- The presence of two pieces of lead in the electric lamp.
…………………………………………………………………………………………………………………………..
……………………………………………………………………………………………………………………………
6- The filament of the light bulb is made of tungsten.
……………………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………………
7- The presence of inert gas inside the light bulb
…………………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………………
8- Decorative lamps are connected in parallel not in series.
………………………………………………………………………………………………………………………..
…………………………………………………………………………………………………………………………
9- Although some levers don’t save effort but they are important in our life.
………………………………………………………………………………………………………………………..
………………………………………………………………………………………………………………………..
10- Wheel barrow is considered from second class lever.
………………………………………………………………………………………………………………………
………………………………………………………………………………………………………………………
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Q7: What happens if:
1- Atmospheric air enters the electric bulb through a hole in the base.
………………………………………………………………………...........................................................
2- The tungsten filament of the light bulb is replaced with copper.
………………………………………………………………………............................................................
3- Connecting all light bulbs in series in the house.
………………………………………………………………………...........................................................
4- Increasing number of lamps in an electric circuit connected in series.
………………………………………………………………………..........................................................
Q3: Write the labels on the figure A and write the type of connection in figure B and C:
[A]
[B]
[C]
Type of connection: ……………………
Type of connection: …………………..
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