Scheme of work
Week 1 - Revision
Week 2- Force (meaning of force)
Week 3 - Force (Gravitational
force)
Week 4 - Force ( Friction)
Week 5 - Force(Gravitational
force and
weightlessness)
Week 6 - Force (The earth in
space)
Week 7 - Midterm break
Week 8 - Force (Space travel)
Week 9 - Force ( satellite)
Week 10 - 13: Revision and examination.
FORCE
MEANING OF FORCE
Force is any action that moves
an object or alters its uniform motion
in a given direction.
Force is the product of mass of
the objects and its acceleration.
In science, force is a pull or
push.
Force is measured in Newton ( the
symbol is N)
Mathematical Expression of Force
Force ά mass x acceleration
F= ma, where F= force, m=
mass and a= acceleration
Example 1: Calculate the
amount of force required to
move a body of mass 10kg
with an acceleration of 3m/s2
SOLUTION
Given : mass = 10kg ,
2
acceleration = 3 m/s
F= ?
Recall that, F = ma
F= 10 x 3
F = 30N.
Example 2:
The force which is required to
move an object of mass 500g moving
with an acceleration of 4m/s2 is .
SOLUTION
Given that, F = ?, m = 500g, a = 4
m/s2 .
Convert 500g to kg before solving.
1Kg = 1000g
mass = 500/1000
Mass = 1/2kg
Recall that, F = ma
F=½x4
F = 2N.
EFFECTS OF FORCE
Force has the following effects on a
body.
1. It changes the shape of a body.
2. It makes a body at rest move
3. It makes a moving object stop
4. It causes an object to change its
direction
5. It causes a body to change its
speed.
TYPES OF FORCES
There are two types
of force. These are
1. Contact force
2. Non-contact force
(or force field)
1. CONTACT FORCE
These are force whose sources
are in contact with the body to which
they are applied.
Examples are pull, push, tension
forces ( in strings and wires) and
frictional force (between surfaces).
It can be direct (push, pull &
friction) or indirect ( tension).
2. NON- CONTACT FORCE (OR FORCE FIELDS)
This is a force whose source
does not require contact with the
object to which it is applied. It occurs
between two bodies or objects that
are separated by Space.
Examples are Magnetic
force, Gravitational force & Electric
force
1. MAGNETIC FORCE
This is a force that exists
around magnet . Objects
like iron, pin and nail are
attracted by the
magnetic force if
brought within the
magnetic field.
2 GRAVITATIONAL FORCE.
This is the force
with which the earth
pulls all objects
towards its centre. It
is also called force of
gravity.
3. ELECTRIC FORCE
This is a force that
exists between two
electric charges. Unlike
charges attract each
other. While like charges
repels each other.
DIFFERENCES BETWEEN GRAVITATIONAL
FORCE AND MAGNETIC FORCE
Gravitational
Magnetic Force
Force
1. It is a property
1. It is the pull
of some
exerted by the
substance to
earth on objects
attract iron or
steel objects
towards itself.
2. The direction of 2. The direction of
the force is
the force is
towards the
always
magnet.
downward the
3. The strength
3. The strength
of the force is
of the force is
weak
strong
4. It cannot pass 4. It can easily
through
pass through
substances like
substances like
wood, metal or
wood or glass.
glass.
5. It gives
objects its
weight
6. It enables
fruits to fall
from trees
5. It cannot
give weight
to objects
6. It cannot
fall fruits
from trees.
USES OF FORCE
1. It is needed to make objects
move
2. It prevents car wheels from
slipping on a tarred road when
moving on it.
3. It makes it possible for the car
to stop or slow down when the
brakes are applied
4. Friction between the sole of our feet
and the ground makes it possible for
us to walk without slipping.
5. Magnetic force is used by watch
repairers to pick tiny iron materials
like pin and screws
6. Magnetic force is applied to
separate iron dust from solid nonmagnetic substances like sulphur and
sand.
TOPICAL QUESTIONS ON FORCE
1. Which of the following is an example of
direct contact force? A. Gravitational B.
Magnetic C. Tension D. Friction
2. The quantity of matter in a body is called
its A. Force B. Space C. Mass D. Volume
3. These are field forces EXCEPT ----------force. A. Electric B. Frictional C.
Gravitational D. Magnetic
4. The amount of force needed to lift an
object depend on the object's A. Energy B.
Size C. Mass D. Force
5. The S.I unit of force is
A. N B. Nm C. Mn D. Kg
6. In science, a push or pull is a
A. Fall B. Rise C. Game D. Force
7. Which of the following is a
direct contact force?
A. Push B. Pull C. Tension D.
Tendon
8.The weight of an object is measured
in A. Kilobytes B. Kilometers C.
Kilowatt D. Newton
9.Gravitational, magnetic and electric
forces are generally called A. Contract
forces B. Contact forces C. Noncontract forces D. Non-contact forces
10.A force applied directly to an object
which may involve pushing or pulling is
called A. Gravitational B. Frictional C.
Contact D. Magnetic
WEEK 3
CALCULATION OF
GRAVITATIONAL FORCE
Gravitational force: is the
force with which the earth pulls
all objects towards its centre. It
is also called force of gravity.
The instrument used for
measuring gravitational force is
called spring balance.
When a ball of mass, m,
kilograms(kg) is thrown
upward above the ground
level to a height, h,
metres(m). Gravitational
force on the ball is given as: F
=mxg
F = mg---------- (1)
Where m is the mass of
the ball in kg, g is the
acceleration due to gravity in
m/s2 (meter per second square).
Note: On the earth surface the
universal value of acceleration
due to gravity(g) is 9.8 m/s2 or
10 m/s2 .
The System International(S.I)
unit of force is Newton( the
symbol is N) named after Sir
Isaac Newton who first
discovered the facts about
gravity.
Work done is defined as the
product of force and the
distance covered by the object.
Work done = force x distance
W.D = F x h …………. (2)
Recall that, f = mg from equation
(1)
W.D = m x g x h
W.D = mgh…………… (3). This is
used for calculation of work done
against gravity.
The S.I unit of work done is Joules
(the symbol is J). Note that
1000J = 1KJ.
Example 1: Calculate the
gravitational force required to
pull down a mango tree of mass
10kg falling with an acceleration
0f 5 m/s2 .
SOLUTION
Given that: F = ?, m= 5kg, a = 5 m/s2
Recall that F = mg from equation (1)
F = 10 x 5
F = 50N.
Example 2: Calculate the work done if
a box is pulled by a person with a
force of 30N through a distance of
7m.
Then,
SOLUTION
Given that, W.D = ?, F = 30N, h = 7m
Recall that W. D = F x h from equation
(2)
W.D = 30 x 7
= 210J
Example 3: If a load of mass 12kg is
raised up to a height of 40m. What is
the work done in the process?(Take
g=10 m/s2 ).
SOLUTION
Given that, W.D=?,
m=12kg, g=10 m/s2 ,
h=40m
Recall that W.D = mgh from
equation (3)
W.D = 12 x 10 x 40
W.D = 4800J or 4.8KJ
ASSIGNMENT
1. A mass of 300g is acted upon by
a force which produces an
acceleration of 5m/s2. Calculate
the force.
2. What is the work done by a man
who lifts a block of 30kg through a
height of 3 meters? (g=10m/s2).
3. How many work is done when a force of
200N is applied by a car over a distance of
6m ?
4. Suppose you lift an object of mass 2kg
from the ground to height of 2m, what is
the work done in lifting the object? ( Take g
= 10 metres per second square).
5. Calculate the gravitational force on an
object of mass 80kg which produces an
acceleration of 22 meters per second
square.
WEEK 4
FRICTION
This can be defined as any
force that tries to stop a body
from moving or that opposes
motion.
NOTE:
Friction is greater when
the surfaces of the body in
contact are rough than when
they are smooth.
Friction slows down
motion and acts in the
opposite direction to the way
they are moving.
ADVANTAGES OF FRICTION
1. It enables us to stand, walk and
run without falling.
2. It makes sharpening of tools like
cutlass, knives etc possible.
3. It is a useful force when we tie
shoe lace.
4. It is a useful force when we
strike a match or sit on a chair.
5. Build up of friction between the
bolts and nuts help them to
stay tightened
6. It makes the use of belt possible
in machines.
7. It makes a moving vehicle come to
a stop whenever it brakes are applied.
DISADVANTAGES OF FRICTION
1. It causes wear and tear on the
moving parts of machines.
2. It causes unpleasant sound(noise)
3. It increases the cost of maintenance
4. It causes heat in any engine which
can lead to breakdown of the
machine.
5.It reduces motion.
6.It reduces the efficiency
of machines.
7.It increases the energy
required to operate
machine.
HOW TO REDUCE FRICTION
Friction can be reduced in
the following ways:
1.Use of lubricants e.g.
greases and oils.
2.Polishing or Smoothening
the surfaces in contact.
3.Ball-bearing or
rollers reduces
friction.
4.Streamlining ( shape
of an object).
BALANCED FORCE
This is the action of two
equal and opposite forces
acting on a body.
It makes a body to
remain in equilibrium i.e.
no motion occur.
UNBALANCED FORCE
This is the action of two
unequal and unidirectional
forces acting on a body.
It makes a body not to
be in equilibrium by
causing motion to occur.
WEEK 5
GRAVITATION AND
WEIGHTLESSNESS
The pull or attraction of the
earth towards its centre is
called the earth’s
gravitation.
MEANING OF GRAVITATION
This is a type of force
that acts on a body
across a distance,
without any contact
between the source and
the body.
MEANING OF CENTRE OF GRAVITY
The centre of
gravity of an object
is the point where
the object is
perfectly balanced.
Note :
The amount of force with which
gravity pulls an object depends
on three things:
i. The mass of the object.
ii. The mass of the earth
iii. The distance between the
centre of the object and the
earth.
EFFECTS OF GRAVITATION ON
OBJECTS
1.It gives objects weight
2.It keeps the earth and
the other planets in
their orbits around the
sun.
3.It keeps the moon in its
orbits around the earth
4.It keeps the moon in its path
in the sky.
5.It is the work against gravity
that make aeroplane to fly in
the sky.
6.It brings about the formation
of tides for convection.
MEANING OF WEIGHTLESSNESS
Weightlessness is
defined as a state
of not experiencing
the effect of gravity.
Astronauts in space
do not feel the effects of
gravity (gravitational pull).
Weightlessness in objects is
observed in places with very
little or no force of gravity
e.g. in space and moon.
Note:
The weight of an object
in the moon is one sixth
(1/6) of the weight of the
object on earth and that is
why astronauts seem lighter
and need special boots and
clothes to walk on the moon.
Example 1:
If an astronaut weighs 60N on
earth, what will be his weight in the
moon?
SOLUTION
Let M= the weight of the astronauts in
the moon.
Since, the weight of an astronaut on
the moon is 1/6 of his weight on
earth
Therefore,
M = 1/6 x 60N
M= 10N.
Example 2: If an astronaut weighs
160N in the moon, what will be his
weight on the earth?
SOLUTION
Let E = the weight of the astronaut on
earth.
Since, the weight of the astronaut on
the moon is 1/6 of his weight on
earth
Therefore,
160N = 1/6 x E
Cross multiply
E = 160N x 6
E= 960N.
HINTS:
1. To determine the weight of
an object in the moon,
divide the value given by 6.
2. To determine the weight of
an object on the earth,
multiply the value given by
6.
TOPICAL EVALUATION
QUESTIONS
1. Gravity depends on these factors
EXCEPT
A. Mass of the object B. Mass of the earth C.
Distance between object and the earth
D. Distance between object and the moon.
2. The force with which the earth attracts
objects towards its centre is called
A. Gravity B. Force C. Mass D. Joules
3. The force of gravity attracts the objects
going up to the
A. Moon surface B. Satellite surface C.
Earth's surface D. Sun surface
4. A calibrated spring balance can be used to
measure
A. Magnetic force B. Weight C. Gravitational
force D. Electrical force
5. Centre of gravity simply means
A. Centre at which the body balance its position
to operate B. Centre at which the body remains
at rest C. Point at which a body remains at rest
D. Point where two or more bodies meet
6. The gravitational force on the moon is about
1/6 of that of the earth. Calculate the weight of a
man on the moon who weighs 90kg on earth
A. 15kg B. 75kg C. 84kg D. 540kg
7. Gravitational force is a force of
A. Attraction B. Separation C. Opposition D.
Movement
8. Astronauts in space have one major problem which
is
A. Weather B. Heaviness C. Communication D.
Weightlessness
9. The further away an object is from the centre of the
earth, the
A. more its mass B. less its mass C. more its weight
D. less its weight
10. The name of the scientist that proposed the
principles of gravity which have become universally
accepted is
A. Nelson Mandela B. Sir Isaac Newton C.
Muhammad Buhari D. Wale Adenuga
11. The main reason why the earth has a great
gravitational pull on objects is
A. The earth has a great mass B. The earth is
spherical C. The earth is rotating D. The earth can
move
12. Gravitational pull causes the following EXCEPT
A. Makes objects to have weight B. Causes objects
to fall back when thrown up
C. Causes objects to float in air D. Causes objects to
feel heavy
13. The attraction exerted by the earth which makes
an object fall to the ground if not supported is known
as A. Earth's movement B. Earth's attraction C.
Earth's gravitational attraction
D. Attraction of the masses
14. -------------------- is a state of not
experiencing the effect of gravity
A. Force B. Push or pull C. Power D.
Weightlessness
15. The weight of an object in the surface
of the moon is
A. One-tenth that on earth B. One-sixth
that on earth C. The same with that on
earth
D. Twice that on earth
ANSWER
1D
2 A
3C
4C
5C
6A
7A
8D
9D
10 B
11 A
12 C
13 C
14 D
15 B
WEEK 6
THE EARTH IN SPACESOLAR SYSTEM,
EARTH ROTATION AND
ECLIPSE
THE SOLAR SYSTEM
The solar system consists of
the sun, the eight official
planets , at least three “ dwarf
planets” more than 130 satellites
of the planets, a large number of
small bodies ( called the comets
and asteroids) and the
interplanetary medium.
The solar system is divided into
inner and outer parts. The inner solar
system contains the Sun, Mercury,
Venus, Earth and Mars while the
outer part contains Jupiter, Saturn,
Uranus, and Neptune. The two parts
are demarcated by asteroid belt.
( Pluto is now classified as dwarf
planet).
The Eight Planets are:
I. Mercury
II. Venus
III. Earth
IV. Mars
V. Jupiter
VI. Saturn
VII.Uranus
VIII.Neptune
ROTATION OF THE EARTH
Rotation is the movement of
the earth round its own axis.
The earth rotates and completes
one rotation on its axis every 24
hours. The rotation of the earth
on its axis causes day and night.
Therefore, one day and one night
makes up the 24 hours.
The Sun is a stationary body. This
means that it does not move. The
rotation of the earth makes it appear
as if the sun is moving.
THE MOON
The moon is a natural
satellite. A satellite is any
object that revolves round a
planet. Our planet ( Earth)
has only one moon. Some
planets have no moon at all,
while others have more than
one moon.
PLANETS AND THEIR MOONS
PLANET
NUMBER OF
MOONS
NUMBER OF
NATURAL
SATELLITES
MERCURY
0
0
VERNUS
0
0
EARTH
1
1
MARS
2
2
JUPITER
12
12
SATURN
10
10
URANUS
5
5
NEPTUNE
2
2
Earth’s moon is a slightly
egg-shaped ball, and is
composed mostly of rock and
metal.
It is the second brightest
object after the sun. It does not
produce any light of its own, but
shines by reflecting the light
from the sun.
The moon is the ONLY place
in space that humans have
visited.
ROTATION OF THE MOON
The moon is a
natural satellite of the
earth and revolves
round the earth once
in about 27.3 days.
However, for the moon to
go from one phase to the
next phase, it takes 29
days. This period is called
the lunar months.
Five phases occur during the
rotation of the moon. They are as
follows:
I. New moon
II. Quarter moon
III.Half moon
IV.Three quarter moon
V. Full moon.
REVOLUTION OF THE EARTH
The revolution of the earth is
the movement round the Sun. It
takes 365 days (1 year) to
complete one revolution round
the Sun. The revolution of the
earth causes seasons. There are
two major seasons in a year
namely summer and winter.
What causes these seasons
is due to the tilting of the Earth
during rotation. When the earth
rotates and comes to the east
the northern axis tilts toward the
sun causing summer while the
southern axis tilts away from the
sun causing winter.
ECLIPSE
An eclipse occurs when a
heavenly body such as the
moon get into the space
between the earth and the
Sun thereby blocking some
part of the earth from
receiving sunlight directly
from the Sun.
TYPES OF ECLIPSE
There are two
types of eclipse
namely:
1.Eclipse of the sun
2.Eclipse of the moon
1. ECLIPSE OF THE SUN
An eclipse of the sun is also
called a solar eclipse. This occurs
when the moon gets directly
between the earth and the sun.
At this period, the earth or parts
of it will not see the sun for
sometime during the day, until the
moon moves out of that point.
Another eclipse of the sun, which
may occur, is the annular eclipse.
This occurs when the moon is far
away from the earth than usual, so
that it casts a smaller shadow on
earth that blocks out only the centre
of the sun. So, only a partial shadow
falls on the earth at this period.
2. ECLIPSE OF THE MOON
The eclipse of the moon is
also called Lunar Eclipse. This
occurs when the earth moves
between the sun and the moon.
When this happens, the earth
blocks the rays of light from
reaching the moon, so that the
shadow of the earth is cast on
the moon for some time.
There are two types of lunar
eclipse, that is , the eclipse of
the moon. (a) total lunar eclipse
occurs when the earth’s shadow
covers the entire moon. (b) A
partial lunar eclipse occurs when
the earth’s shadow falls on only
a part of the moon.
TOPICAL EVALUATION QUESTIONS
1. How many planets are there in the solar
system? A. 6 B. 7 C. 8 D. 9
2. The Earth has
A. Ten satellites B. Twenty artificial satellites
C. One natural satellite D. Ten natural
satellites
3. Which is the closest planet to the sun?
A. Pluto B. Mercury C. Earth D. Saturn
4. The following are the components of the
solar system EXCEPT
A. Asteroid B. Comets C. Satellites D. Night
5. The earth takes---------- to complete
one rotation around its axis per day.
A. 1 hour B. 24 hours C. 27 hours D. 30
hours
6. The following form the inner solar
system EXCEPT
A. Mercury B. Venus C. Saturn D. Mars
7. The following form the outer solar
system EXCEPT
A. Neptune B. Venus C. Uranus D. Jupiter
8. The ONLY planet in the solar system
with the temperature that can support life
9. Which of the following is a luminous body in the
solar system?
A. Earth B. Jupiter C. Saturn D. Sun
10. When the earth comes between the sun and the
moon, ------------- occurs.
A. Annular eclipse B. Eclipse of the moon C. Eclipse of
the sun D. Partial eclipse
11. Which of the following is called a satellite of the
earth?
A. Asteroid B. Comet C. Moon D. Pluto
12. Seasons occur because of the
A. Inclination of the earth as it rotates about its axis B.
Revolution of the earth round the sun
C. Rotation of the earth on its axis D. Rotation of the
sun
13. The revolution of the earth causes
A. Occurrence of seasons B. Day and
night C. Rain and sun D. Dry and wet
14. Uranus is the ------- planet in the solar
system.
A. Third B. Sixth C. Second D. Seven
15. The moon revolves round the earth in
___ days. A 29 B 28 C 27.3 D 27
16. The largest planet in the universe is
A. Jupiter B. Saturn C. Mercury D. Pluto
17. The planet which has disintegrated is
A. Mercury B. Jupiter C. Pluto D. Saturn
18. When the moon is far from the earth
such that no region of the moon falls on
the earth, it results in
A. Total eclipse B. Partial eclipse C.
Annular eclipse D. Lunar eclipse
19. Solar system comprises of --- and ---A. Stars, moon B. Sun, planets C. Sun,
metallic D. Sun, earth
20. The moon can be described as
A. Comet B. Planet C. Satellite D. Star
ANSWER
1C
2C
3B
4D
5B
6C
7B
8A
9D
10 B
11 C
12 B
13 A
14 D
15 C
16 A
17 C
18 C
19 B
20 C
WEEK 8
SPACE TRAVEL
LESSON OBJECTIVES
At the end of the lesson, students
should be able to:
1. explain space and space travel;
2. recall the first in space science;
3. enumerate two purposes of space
travel;
4. outline four dangers of space
travel.
MEANING OF SPACE
The place or
region beyond the
earth’s atmosphere
is called space.
MEANING OF SPACE TRAVEL
Going into space (the
moon, and other
planets, or orbiting the
earth) in a spaceship or
space shuttle is called
space travel.
THE FIRST IN SPACE SCIENCE
1.Yuri Gagarin was the first
person (male) to go to
space on April 12, 1961.
2.Neil Armstrong was the
first person to step on the
moon on July 21, 1969.
PURPOSE/ADVANTAGES OF SPACE TRAVEL
1.Advancing
scientific
research
2.Uniting different
nations.
3.Ensuring the future survival
of humanity
4.Developing strategic military
advantages over other
nations.
5.It helps in weather forecast
and agriculture
6.
It can be use to predict
natural disasters using satellites
7. It helps in production of
photographic equipment e.g. xray and gamma ray machines
DANGERS OF SPACE TRAVEL
1.The major danger is that
man cannot live
permanently in the space.
2.Weightlessness
3.Explosion of rockets at
the launch path or in
flight.
4.Development of weak
bones due to loss of
calcium.
5.Failure of some necessary
equipment in the
spaceship to function
well.
6. Space travel is risky. It may
lead to loss of life e.g. The
disappearance of the
American Space Flight named
Avenger with 11 crew
members in 1980.
7. Wrong calculation of the
angle, speed at the time of
launching.
TOPICAL EVALUATION QUESTIONS
1. The American Space Flight named Avenger
suddenly disappears with how many crew
members on board?
A. 8 B. 9 C. 10 D. 11
2. Scientists that travel to space are called
A. Archaeologist B. Astrologers C. Astronomers
D. Astronauts
3. The sudden disappearance of the American
Space Flight named Avenger occurred in what
year
A. 1908 B. 1890 C. 1809 D. 1980
4. The force needed by spaceship to keep it
moving round the earth is known as------ force.
A. Centrifugal B. Electrical C. Frictional D.
Gravitational
5. Who was the first person to step on the moon?
A. Neil Armstrong B. Jonathan Bassey C.
Roberto Carlos D. Joseph Michael
6. The travel from the earth through space to
other planets or earth's moon is called
A. Journey B. Travelling C. Tourism D. Space
travel
7. The first person to step on the moon did that
in what year?I
A. 1699 B. 1996 C. 1969 D.1973
8. A Russian cosmonaut who was the first man
in space is by name?
A. Neil Armstrong B. Yuri Gagarin C. Helen
Sharman D. Valentine Tereshkova
9. Which of these is NOT a benefit of space
travel?
A. Weather forecast B. Alternative power source
C. Land survey and navigation devices (GPS) D.
Cordless tools for mass destruction 1
10. What's the full meaning of GPS?
A. Gospel Preaching Students B. Global
Positioning System C. God's Power Saves
D. Government Public Schools
11. The Space outside the Sun, stars and planets
is called
A. Outer Space B. Galaxies C. Atmosphere D.
Moon
12. What is the name of the special craft that
could be used to travel to the Moon, planets or
orbit the earth called A. Spaceship B. Sun C.
Planets D. Craft
ANSWER
1D
2D
3D
4D
5A
6D
7C
8B
9D
10 B
11 A
12 A
WEEK 9
SPACE TRAVEL
LESSON OBJECTIVES
At the end of the lesson, students
should be able to:
1. explain space and space travel;
2. recall the first in space science;
3. enumerate two purposes of space
travel;
4. outline four dangers of space
travel.
MEANING OF SPACE
The place or
region beyond the
earth’s atmosphere
is called space.
MEANING OF SPACE TRAVEL
Going into space (the
moon, and other
planets, or orbiting the
earth) in a spaceship or
space shuttle is called
space travel.
THE FIRST IN SPACE SCIENCE
1.Yuri Gagarin was the first
person (male) to go to
space on April 12, 1961.
2.Neil Armstrong was the
first person to step on the
moon on July 21, 1969.
PURPOSE/ADVANTAGES OF SPACE TRAVEL
1.Advancing
scientific
research
2.Uniting different
nations.
3.Ensuring the future survival
of humanity
4.Developing strategic military
advantages over other
nations.
5.It helps in weather forecast
and agriculture
6.
It can be use to predict
natural disasters using satellites
7. It helps in production of
photographic equipment e.g. xray and gamma ray machines
DANGERS OF SPACE TRAVEL
1.The major danger is that
man cannot live
permanently in the space.
2.Weightlessness
3.Explosion of rockets at
the launch path or in
flight.
4.Development of weak
bones due to loss of
calcium.
5.Failure of some necessary
equipment in the
spaceship to function
well.
6. Space travel is risky. It may
lead to loss of life e.g. The
disappearance of the
American Space Flight named
Avenger with 11 crew
members in 1980.
7. Wrong calculation of the
angle, speed at the time of
launching.
TOPICAL EVALUATION QUESTIONS
1. The American Space Flight named Avenger
suddenly disappears with how many crew
members on board?
A. 8 B. 9 C. 10 D. 11
2. Scientists that travel to space are called
A. Archaeologist B. Astrologers C. Astronomers
D. Astronauts
3. The sudden disappearance of the American
Space Flight named Avenger occurred in what
year
A. 1908 B. 1890 C. 1809 D. 1980
4. The force needed by spaceship to keep it
moving round the earth is known as------ force.
A. Centrifugal B. Electrical C. Frictional D.
Gravitational
5. Who was the first person to step on the moon?
A. Neil Armstrong B. Jonathan Bassey C.
Roberto Carlos D. Joseph Michael
6. The travel from the earth through space to
other planets or earth's moon is called
A. Journey B. Travelling C. Tourism D. Space
travel
7. The first person to step on the moon did that
in what year?I
A. 1699 B. 1996 C. 1969 D.1973
8. A Russian cosmonaut who was the first man
in space is by name?
A. Neil Armstrong B. Yuri Gagarin C. Helen
Sharman D. Valentine Tereshkova
9. Which of these is NOT a benefit of space
travel?
A. Weather forecast B. Alternative power source
C. Land survey and navigation devices (GPS) D.
Cordless tools for mass destruction 1
10. What's the full meaning of GPS?
A. Gospel Preaching Students B. Global
Positioning System C. God's Power Saves
D. Government Public Schools
11. The Space outside the Sun, stars and planets
is called
A. Outer Space B. Galaxies C. Atmosphere D.
Moon
12. What is the name of the special craft that
could be used to travel to the Moon, planets or
orbit the earth called A. Spaceship B. Sun C.
Planets D. Craft
ANSWER
1D
2D
3D
4D
5A
6D
7C
8B
9D
10 B
11 A
12 A