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Model answer
1-A1- displacement
2- light year
3-gametes formation - fertilization
4- concave
1- B1- The transparent medium that refracts the light and is limited
with two spherical surfaces and it is usually glass or plastic
2- The angle between the incident light and the normal.
1-c1- Due to the difference in the distance between the planet and
the sun and the speed of rotation of the planet around the sun
2- In order to predict the relation between certain physical
quantities and understanding practical results to describe
physical phenomena in easier way
3- Because it is produces from the male and female gametes
2-a
1-a
2-b
3-d
4-a
5-b
2-b1- A = v2 –v1 = 20-0 = 4 m/sec2
T
5
2-postive acceleration
2-c1- It size contacted and its revolving speed around it self increase
2- It will reflect passing through the focus
3-a1- Relative speed
2- Solar system
3- Vector physical quantities
4- Newton’s law of universal gravitational force
5- First law of light reflection
3-b1- 23 chromosomes
2- 23 pairs of chromosomes
3-cInverted , equal , real.
4-a1- Speed.
2- Alfred Hall
3- Prophase
4- 20 m/sec
5- 4 meters
4-b1- The distance = 30+40 = 70 meter
2- Average speed = total distance = 70 =10m/sec
Total time
7
4-c1- Short sight by using concave lens – long sight by using
convex lens .
2- Closed universe theory : Universe will stop expand and begin to contract unit it
become hot preparing new big bang
Opened universe theory: no defined end
Model answer
1-a1- Centormere
2- Hydrogen
3- 40 cm
4- Displacement covered
1-ba = v2 –v1 = 25 – 0 = 2.5 m/sec 2
Δt
10
1-c1- This means that he can see the near object only clearly but far
object seems distorted
2- This means that the speed of this car relative to another body
is 90 km/hr
2-a1- D
2- B
3- A
4- A
2-b-
1- Due to the continuous separation between galaxies in the
universe
2- Because it gets its genetic traits from one parent through
mitotic division
2-cAngle of incidence = 140 º/ 2 = 70º
3-a1 – lens
2 Fertilization
3- The sun
4- Regular speed
3-b1- Day : It is the period taken by the planet to make one complete rotation
around its axis.
Year : It is the period taken by the planet to make one complete rotation
around the sun.
2- To form a real and magnified image the object is located
between the focus and the center of curvature
To form a virtual and magnified image the object is located
before the focus
3- C –
40m/sec
4- A1- Zero
2- Binary fission
3- Light reflection
4- Distance / speed
4-b1- It passes through the lens without refraction
2- It size contracted and it speed around it self increase
4-c1- 23 chromosome
2- 23 pairs of chromosomes
Model answer
1-a1- Vector – scalar
2- Plane
3- Gametes formation – fertilization
1-b1- Because the lens has two circular surfaces but the mirror has
only one circular surface
2- Due to the distance between the plant and the sun and its
speed of rotation around the sun
1-cIt is the change of object’s position by equal distance at equal
intervals of time
2-a1- C
2- A
3- B
4- C
2-ba = v2 –v1
-2= v2 – 80
v2= (-2x12)+80 = 56m/sec
Δt
12
2-c1- The planet will leave their orbit and move in a random way and
this will lead to destruction of the earth
2- The genetic variation occurs among the members of the same
species
3-a1- Acceleration
2- Focus
3- Solar nebula
4- Milky way galaxy
5- Spindle fibers
3-b-
Real , inverted , small
3-c1- 23 pairs of chromosomes
2- 23 pairs of chromosomes
4-a-
1- Average speed
2- Nebular theory
3- Virtual , erected and small
4- Anaphase
4-bShort sight: It is the vision defect through which near objects can be seen
clearly but far objects seen distorted. The image formed in front of the
retina.-------Correction by using concave lens .
long sight: It is a vision defect through which far objects only can be seen
clearly but close objects are not seen clearly. The image formed behind the
retina.------correction by using convex lens .
4-c1- It is the speed of a moving object relative to an observer
2- It is the space which contains all galaxies, stars, planets, moons and living
organisms.
Model answer
1-a1- Relative speed
2- Spindle fibers
3- Contact lens
4- Light
5- Regular speed
1-b1- It states that there is no definite end for the universe
2- It is a glowing gas sphere revolving around itself from which
the solar system is originated.
3- It is the time taken by the earth to complete one rotation
around the sun
1-c1- 48 cm
2- Real , inverted and equal to the object
2-a1- A
2- A
3- C
4- C
5- B
2-b1- Because it gets its genetic traits from one parent through
mitotic division
2- Due to the center gravitational force of the sun
3- Because distance is determined by magnitude only while
displacement by both magnitude and direction
2-c1- This cause the retina to be far from the lens so it cause short
sight
2- The part containing a part of the central disc grows to form
new individual
3-a1- Distance
2- Parallel
3- Milky way galxy
4- 220
5- Plane mirror
3-b1- In uterus mitotic division
In ovary : meiotic division
2-in uterus 2 cells – 2 N
In ovary 4 cells- N
3-c1- Δv = 10m/sec
V2-v1 = 10 m/sec
As the body moves from rest then
V1 = zero then final speed = 10 m/sec
2- Positive acceleration
4-a1- Magnitude and direction
2- Mitosis
3- 20 m/sec
4- 15 cm
5- Helium and hydrogen
4-b1- The real image can be received on a screen the virtual image
cannot be received on a screen
2- The crossing star theory Chamberlain and Moulton.
The modern theory of the world Alfred Hale
4-c1- The total distance covered = 2+5+1+3+1 = 12 km
2- The displacement = 5 -3 =2 Km in the east DIRECTION
3- The velocity equal = displacement / time
= 2/0.033 = 60.6 km/hr in the east direction
Model answer
1-a1- Laplace – Alfred Hale
2- Two chromatids – centromere
3- The radius of the plant – the speed of rotation of the plant
around its axis
4- Short sight – concave
5- Relative speed – velocity
6- Without refraction – passing through the focus
1-b1- It is the physical quantity that has magnitude and direction
2- It is the change of an object speed in one second in a specific
direction
1-c-
Real , inverted , small
2-a1- Prophase
2- The displacement
3- The principle axis
4- Jupiter
5- Focus
2-b1- Because the angel of incidence = angle of reflection = zero
2- To help us to identify the car speed directly .
2-c1- 32
2- 32
3- 16
3-a1- The pole of the mirror
2- Sun
3- First law of light reflection
4- Light reflection
5- Solar system
3-b1- Metaphase
2- Spindle fiber not formed
3-c1- The total distance = 30+60+30 = 120 m
2- The total time = 30+20+10 = 60 sec
3- The displacement = 60 m in the east direction
4-a1- A
2- D
3- A
4-b1- The speed = 90x 1000 =25m/sec
3600
a = v2 –v1 = 25 – 0 = 2.5 m/sec 2
Δt
10
4-c1- a- the universe
b- the separation of the grains resemble the separation of the
galaxies in the universe
2- the universe is in the state of continuous motion
Model answer
1-a1- a
2- d
3- b
4- a
5- d
6- a
1-b1- it rotates around the earth at height 500km and collects the
photos of the universe since millions of years
2- they are used instead of the glasses to treat the vision defect
1-ca = v2 –v1
Δt
2-a1- relative speed
2- universe
3- the zygote
4- Average speed
-2= v2 – 80
12
v2= (-2x12)+80 = 56m/sec
5- Vector physical quantites
6- Angle of reflection
2-b1- Mitosis takes place in somatic cells
Meioses takes place in reproductive cells
2- The nebular theory Laplace
The crossing star theory Chamberlain and Moulton
2-c-
Real , inverted , smaller
f = r/2
r = 3x 2 = 6 cm
3-a1- A vector- a scalar
2- Radius of the planet – speed of rotation of the planet around it
axis
3- Refracts – reflects
4- Decreases – slower
5- The distance – time
6- Long sight- convex
3-b1- 23 pairs of chromosomes
2- 23 chromosomes
3-c1- When the object moves in straight line and in a fixed direction
2- When the body is placed at the center of curvature of a
concave mirror
4-a1- The optical center
2- The speedometer
3- Mercury
4- A concave lens
4-b1- Because of the offspring combines the genetic trades from 2
sources
2- Due to the continuous spacing between galaxies in the
universe
3- Due to the condition of the road
4- Because it is the vegetative reproduction occurs by roots,leaves
and stems
4-c1- Regular speed
2- Speed of body A = 2/1 = 2 m/sec
Speed of body B = 1/1 = 1 m/sec
The ratio of speed A : B = 2 : 1
Model answer
1-a1- Concave
2- The principle axis of the mirror
3- Spindle fibers
4- Newton
5- Distance
1-b1- Due to the roads condition
2- Due to the difference in – the radius of the planet –and the
speed of rotation of the planet around its axis
1-cFocal length = r/2 = 40/2 = 20 cm
Real, inverted and enlarged
2-a1- B
2- A
3- A
4- C
5- C
2-b-
1Real image
Virtual image
It is formed as a result of the
intersection of the reflected or
refracted light rays.
It is formed as a result of the
intersection of the extensions of
the reflected or refracted light
rays.
It can be received on a screen.
It cannot be received on a
screen.
It is always inverted.
It is always erect [upright]
It is larger or smaller than the
object.
It is larger, smaller or equal to
the object.
2- The crossing star theory Chamberlain and Moulton
The modern theory Alfred Hale
2-cThe speed = 72x 1000 =20m/sec
3600
a = v2 –v1 = 0-20 = -2.5 m/sec 2
Δt
8
3-a1- The pole of the mirror
2- Regeneration
3- Scalar physical quantity
4- Crossing over phenomena
5- Universe
3-b1- Closed universe theory : Universe will stop expand and begin to contract unit it
become hot preparing new big bang
Opened universe theory: no defined end
3-c1-
2- Graph B
4-a1- Mitosis
2- m/sec
3- Jupiter
4- 220 million years
5- Plastic
4-b1- This causes the shortness of the retina of the eye sphere thus
the retina is closed to the eye lens and this causes long sight
2- It passes through the lens without refraction
4-c1- The distance covered by the body = 44 x 1.5 = 66 m
2- The displacement = the diameter of the circle = 14 m
3- The average speed = total distance = 66 = 6.6 m/sec
Total time
10