Download Final Revision 1] Complete the following

Science Third Prep.
Final Revision
1] Complete the following:
1. From the scalar physical quantities ---------, and -----------, while from the vector
quantities -----------, and ------------------.
2. The shortest year is one ---------.
3. The gametes contain number of chromosomes equal --------- the number of
chromosomes in the somatic cell.
4. The shortsighted person is treated by ------------ lens.
5. During the metaphase the ----------- are arranged at the cell equator.
6. The chromosome chemically consists of ----------, and -----------.
7. The light ray that falls passing through the optical center of the convex lens passes ------.
8. The scientist who established the modern theory is -----------.
9. The unit of measuring acceleration is ----------.
10.The yeast fungus reproduces asexually by ----------, and the bread mould fungus
reproduces by ------------.
11.If the focal length of a concave lens is 6 cm, the radius of curvature of this lens is ---- cm.
12. The properties of the image which is put at a distance less than double focal lens and
more than the focal lens -------, --------, and --------.
13.The time taken by Saturn to revolve around the sun is --------.
14.------------ contains the genetic materials of the two parents and grow to form new
individual have the characters of both.
15.One of the types of asexual reproduction is ----------- that occurs in unicellular living
organisms like -------, and multicellular living organisms like -----------, and -----------.
16.The point at the middle of the reflecting surface of the concave mirror is called -----------.
17.The result of dividing the total distance covered by a body and the total time taken is
called -------------.
18.One of the types of the asexual reproduction that takes place in algae and fungi is -------.
19.If an object started its motion from rest, so its initial speed equals -----------.
20.The presence of the moon between the sun and the earth causes ------------ phenomena.
21.The chromosomes consist of ------------- connected at -----------.
22.The asexual reproduction in bacterial cells takes place by --------------.
1
Science Third Prep.
23.The crossing over phenomena occurs in ---------------- of the division.
24.The generation which is produced by ------------ reproduction has genetic traits different
from their parents.
25.The bouncing of light rays when they hit a polished surface is called -------------.
26.The scientist who established the nebula theory is called -------------.
27.The light ray that falls parallel to the principle axis of the concave mirror reflects passing
through -----------------.
28.The galaxies present in the form of ---------------, one of them contains the sun and called
--------------- galaxy.
29. The convex mirror its reflecting surface is the ------------ surface of a sphere, while the
concave mirror its reflecting surface is the ---------------- surface of a sphere.
30.The reproduction in living organisms is ------------, and -------------.
31.The fertilization is the combination of -------------- and ------------- to produce -----------.
32.The meiotic cell division occurs in -------------- cells.
33.If a light ray falls on a convex mirror passing through the focus it passes ---------------.
34.The parent disappears in the reproduction of ---------------.
35.To describe the motion of an object we need two factors which are ----------, and ---------.
36.The image formed through the plane mirror is always -----------, --------------, and -----------.
37.The solar system present at one of the --------------- at the edge of the Milky Way galaxy,
which complete its revolution around the center of the galaxy every ------------- years.
38.The spindle fibers in the animal cell are produced from -----------, and in the plant cell
from the intensifying of ------------ at the cell poles.
39.The angle of incidence of the light ray which falls perpendicular on the reflecting surface
equals -------------, so if reflects --------------.
40. The bacteria reproduces asexually by ------------, while the bread mould fungus
reproduces by --------------.
Write the scientific term of the following:
1.
2.
3.
4.
5.
6.
It contains all galaxies, stars, and planets.
The straight line passing through the pole of the mirror and its center of curvature.
The speed in which the body moves equal distance in equal periods of time.
The point of connection of the two chromatids.
A galaxy encodes the sun and the solar system.
A point at the bottom of the lens on its principle axis.
2
Science Third Prep.
7. The change in the position of a body as time passes relative to another body or fixed
point.
8. A disease infects the eye causing drying of the eye lens.
9. The rebounding of light rays in the same media when they hit a polished surface.
10.The ability of some living organisms to compensate the damage parts.
11.A division occurs in the somatic cells of the living organism.
12.The force that makes planets revolves around the sun in fixed orbits.
13. The distance covered by light in one year.
14.The line passing through the two centers of curvature of the two faces of the lens and
its optical center.
15.The phase in which the vital processes that prepare the cell for division and the genetic
material is multiplied.
16.A unit is used to measure the distances in the space.
17.The expansion of the universe and the gathering of the particles forming hydrogen and
helium gases.
18.The speed in which the body moves unequal distances in equal periods of time.
19.The change in speed per unit time.
20.The point of collecting the light rays in the converging mirror.
Correct the following sentences if they are wrong:
1. If the average speed of a body doesn’t equal its regular speed, so this body moves
unequal distances in unequal periods of time.
--------------------------------------------------------------------------------------------------------------------2. The somatic cells divide meiotic-ally, which helps in growth and compensation of the
damage cells.
--------------------------------------------------------------------------------------------------------------------3. The mass is a vector quantity.
--------------------------------------------------------------------------------------------------------------------4. The crossing over phenomena occurs at the end of metaphase.
--------------------------------------------------------------------------------------------------------------------5. The long sight defect is treated by concave lens.
--------------------------------------------------------------------------------------------------------------------6. The universe expands and the particles gathered to form oxygen and nitrogen gases.
--------------------------------------------------------------------------------------------------------------------3
Science Third Prep.
7. A concave mirror its focal length (vertex) is 10 cm, so its radius of curvature is 5 cm.
--------------------------------------------------------------------------------------------------------------------8. The contact les is a very thin lens made of glass.
--------------------------------------------------------------------------------------------------------------------9. The acceleration is the rate of changing the distance with speed.
--------------------------------------------------------------------------------------------------------------------10.The image formed through the lens may be real or virtual.
--------------------------------------------------------------------------------------------------------------------11.The value of acceleration becomes negative if it is increasing acceleration.
--------------------------------------------------------------------------------------------------------------------12.There are two principle axes for the spherical mirror.
--------------------------------------------------------------------------------------------------------------------13.The physicist use mathematical methods such as graphs and tables.
-------------------------------------------------------------------------------------------------------------------14.The universe is in continuous expansion.
-------------------------------------------------------------------------------------------------------------------15.The uniform speed can’t be determined practicality.
--------------------------------------------------------------------------------------------------------------------
Give Reason of the following:
1. Pilots put in consideration the vector speed (velocity) of wind during flying.
2. The planets revolve around the sun in fixed orbits.
3. The acceleration may be decreasing acceleration.
.
4. There is only one principle axis for the spherical mirrors.
5. The sexual reproduction is a source for the genetic variation.
6. The length of the day differs from planet to another.
7. The convex lens is used in treating the long sight.
8. There is a difference between the average speed and vector speed (velocity).
9. The occurrence of the crossing over phenomena causes variation in genetic treats.
10.The lens has two foci, but the mirror has only one focus.
11.The galaxy in which our solar system belongs is called the Milky Way.
12.The asexual reproduction produces new individual typical to the parent.
13.It is difficult to measure the regular speed.
4
Science Third Prep.
14.The lens has two centers of curvatures (M₁ & M₂).
15.The concave mirror can be used to obtain extreme heat.
16.The length of the year differs from planet to another.
17.The concave lens is used in treatment of the short sight.
18.Star fish arms can be revived and give out new animal.
19.The object which moves by uniform speed its acceleration equal zero.
20.It is possible to obtain real image only by a concave mirror.
What happens if?
1. There is no gravity between sun and planets.
2. The exchange of equal parts of the internal chromatids in the prophase I of the meiotic
division.
3. The average speed is the uniform speed.
4. A plane mirror is put at the left side of the driver instead of a convex mirror.
5. The yeast fungus is put in warm sugar solution.
6. The combination of dust, ice, and gases in the sun nebula.
7. A body is put at the focus of the convex lens.
8. The approaching of planets to the sun in their orbits.
9. The nebula lost its heat from Laplace point of view.
10.A body is put at distance equal double focal length.
Answer the following:
1. Write short notes on:
a. Function of DNA.
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------b. The second law of light reflection.
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------c. Vegetative reproduction.
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------d. Fertilization.
5
Science Third Prep.
e.
f.
g.
h.
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------The crossing star theory.
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Crossing star theory.
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Binary fission.
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------The formation of gametes.
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Compare between:
a. Meiotic and mitotic divisions according to the site of occurrence, the importance,
and the no. of cells produced.
b. Nebula, crossing star, and the modern theory.
c. The somatic cells and gametes according to the no. of chromosomes.
d. The sexual and asexual reproduction according to the type of cell division and the
genetic traits produced.
e. Budding and regeneration.
f. Regular and irregular speed.
g. Distance and displacement.
Write the function of:
a. The convex lens.
----------------------------------------------------------------------------------------------------------------b. Hubble telescope.
----------------------------------------------------------------------------------------------------------------c. Light year.
---------------------------------------------------------------------------------------------------------------d. Contact lens.
----------------------------------------------------------------------------------------------------------------6
Science Third Prep.
6.
7.
8.
9.
What is meant by?
a. The focus of the lens.
b. Velocity (vector speed).
c. The principle axis of the mirror.
d. The average speed.
e. The galaxies.
f. Optical center of the lens.
g. The first law of reflection.
Show by drawing:
a. The formation of sperms in man.
b. The properties of image formed when a body is put at distance more than focal
length and less than the double focal length in front of concave mirror.
c. The properties of image formed when a body is put at distance more than double
focal length in front of convex lens.
d. The properties of image formed when a body is put at distance double focal length of
a convex lens.
If a person stand at distance 4 m of a plane mirror. What is the distance between this
person and its image inside the mirror?
What is the relation between the genetic structure of the offspring and the parents in
the following cases:
a. The binary fission in paramecium.
b. The plant produced from the germination of seeds.
The following graph show the relation between displacement and time in definite
direction:
Displacement
12
24
36
48
(m)
Time (sec.)
2
4
6
8
- From the table describe the motion of the body, and calculate its velocity?
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------A car moves by speed 140 km/h calculate the distance by meter covered by this car in 7
sec.
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------7
Science Third Prep.
10.A car moves in straight line, its speed changes from 8 m/s to 16 m/s in 4 sec. calculate
its acceleration?
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------11.If the angle between the reflected ray and the surface of the mirror is 50°. Calculate its
incident angle?
--------------------------------------------------------------------------------------------------------------------12.A car covered a distance 100 m northward in 40 sec., then 200 m eastward in 100 sec.,
then 100 m southward in 20 sec., then it returned back to the start point in 80 sec.
calculate the following:
a. The total distance ------------.
b. The total time -----------.
c. The average speed --------------.
d. The displacement --------------.
e. The velocity --------------.
8