1st QUARTER
WRITTEN WORK 1
SCIENCE 8
Activity 1. Effect of force on a ball
Figure 6. Effect of force on a ball
Part I: ANALYZATION
Direction: Examine the ball on top of the table (see figure 6). Choose the letter of your answer to the
given conditions below:
Condition Answer
1. In letter A, is the ball at
A. Yes B. No
rest?
2. How can you make the ball A. The ball has to be pushed B. The ball has to be pulled
move? or pulled. only.
3. In letter B, what happens to A. The ball moves in the
the ball when you push it same direction as the B. The ball does not move.
with enough force? force.
B. The ball has to be
4. In letter C, while it is pushed in the same
A. Exert a force opposite the
moving, how can you direction of its motion.
motion of the ball.
make the ball stop?
B. The ball has to be
5. In letter D, how can we
A. The ball has to be pushed pushed in the same
make the ball change its
sideways. direction of its motion.
direction?
Part II: FILL IN THE BLANKS
Direction: Fill in the blanks with correct word/s. Write your answers on a separate sheet of paper.
1. Any push or pull is called ________________.
2. ________________ refers to the size or strength of the force while ________________
points to where the object goes. The direction of the arrowhead indicates the direction of the
force. The length of the arrow represents the amount of force (relative magnitude).
3. There are two types of forces, namely ________________ and ________________.
4. Applied, friction, normal and tensional forces are examples of
________________ forces.
5. Gravitational and magnetic forces are examples of ________________ forces.
6. ________________ are forces that are equal in magnitude but opposite in direction.
7. ________________ are forces that cause a change in the motion of an object.
8. The sum of all forces acting in an object is called ________________.
9. If the forces in an object are balanced, the net force is ________________.
10. If the forces in an object are unbalanced, the net force is ________________.
Part III: MULTIPLE CHOICE
Direction: Choose the letter of the correct answer. Write your answers on a separate sheet of paper.
1. Which is NOT a unit of force?
A. Dyne
B. Joules
C. Newton
D. Pound
2. What refers to how large or strong is the force?
A. magnitude
B. line of action
C. velocity of the object
D. direction of the force
3. What force is always directed opposite to the motion of an object?
A. Friction
B. Gravitational
C. Magnetic
D. Tension
4. What force pulls an object back to the Earth?
A. Applied
B. Gravitational
C. Magnetic
D. Tension
5. Which surface would be easiest for a bicycle to move?
A. Sand
B. Grass
C. Muddy road
D. Concrete road
6. What type of forces holds between two celestial bodies like the Sun and Earth?
A. Applied
B. Gravitational
C. Magnetic
D. Tension
7. What force acts perpendicular to the surface of the object in contact with?
A. Applied
B. Gravitational
C. Normal
D. Tension
8. Two people pull on a rope in a tug-of-war. Each pull with a 300 N force. What is the net
force?
A. 0 N
B. 300 N C. 600 N
D. 900 N
9. Planet Jupiter has a bigger mass than the Earth. If you were able to travel to planet Jupiter,
what happens to your weight?
A. increases
B. decreases
C. stays the same
D. varies with day and night
10.What is the net force in the figure below?
A. 25 N, to the left
B. 25 N, to the right
C. 195 N, to the left
D. 195 N, to the right
1st QUARTER
WRITTEN WORK 2
SCIENCE 8
WHAT I KNOW
DIRECTION: Choose the letter of the correct answer. Write your answers before the item number.
1. Who formulated the Three Laws of Motion?
A. Aristotle
B. Isaac Newton
C. Thomas Edison
D. Alexander Graham Bell
2. Which has more mass, a kilogram of cotton or a kilogram of iron?
A. the iron
B. the cotton
C. they both have the same mass
D. cannot be determined from the given information
3. Which has the greatest inertia?
A. airplane
B. car
C. jeepney
D. bike
4. Which of these vehicles moving at the same velocity is difficult to stop?
A. a bus
B. a car
C. a train
D. a truck
5. All of the following apply the third law of motion EXCEPT ____________.
A. kicking a ball
B. rowing a banca
C. throwing a stone
D. taking out ketchup from a bottle
6. Which of the following statements are true?
I. Action and reaction forces occur in pair.
II. Action and reaction forces act on the same object.
III. Action and reaction forces can occur one at a time.
IV. Action and reaction forces have the same magnitude.
A. I and II
B. I and IV
C. II and III
D. II and IV
7. Which Newton's law explains when a man is pushed forward in the car as it stops?
A. 1st law
B. 2nd law
C. 3rd law
D. 2nd and 3rd laws
8. In Newton’s first law of motion, a moving object that is not acted upon by a net force will
____________.
A. accelerate
B. change its velocity
C. eventually come to a stop
D. continue moving at constant velocity
9. A boy jumps out of the boat into a dock. As the boy moves forward to the dock, the boat
moves backward. Which statement describes this situation?
A. An object at rest remains at rest.
B. Friction opposes the motion of an object.
C. For every action, there is an equal and opposite reaction.
D. The net force is directly proportional to mass and inversely proportional to
acceleration.
10. Two balls are simultaneously applied with a force of 20 N. One ball has a mass of 0.3 kg
and the other has 0.4 kg. Which ball has greater acceleration?
A. They will both accelerate at the same rate.
B. None of them will accelerate greater than the other.
C. The one with a mass of 0.3 kg has the greater acceleration.
D. The one with a mass of 0.4 kg has the greater acceleration.
ASSESSMENT
1. What is the definition of weight?
A. the size of an object
B. the time it takes to get on a ride
C. the amount of matter in an object
D. the magnitude of the force of gravity on an object
2. Which law states that forces act with equal magnitude and in opposite direction?
A. Law of Inertia
B. Law of Interaction
C. Law of Acceleration
D. Law of Gravitational Force
3. For every _________ there is an equal and opposite ___________.
A. action, action
B. reaction, action
C. action, reaction
D. reaction, reaction
4. What Newton’s law of motion requires the use of seat belt in cars?
A. Law of Inertia
B. Law of Interaction
C. Law of Acceleration
D. Law of Universal Gravitation
5. A guava with a mass of 0.200 kg has a weight of ___________.
A. 0.200 N
B. 1.96 N C. 4.50 N
D. 10.0 N
6. A stone hits the ground before a flat sheet of paper because ___________.
A. it is less massive
B. it is more massive
C. the acceleration of gravity is greater on the stone
D. there is more air resistance against the flat paper
7. If the mass of an object is 45 kg on Earth, what is its mass on the moon?
A. 45 N
B. 45 kg
C. 441 N
D. 441 kg
8. Which of the following phenomena applies the first law of motion? A. A leaf sways back and
forth falling from a tree.
B. When a ball falls on the floor, the ball bounces back up.
C. When pushed with the same force, a car accelerates slower than a grocery cart.
D. When a cardboard with coin on top is suddenly pulled, the coin falls into the glass.
9. According to the second law of motion, the net force is the product of mass and acceleration.
Which of the following has the greatest acceleration? A. A 5.000 kg stone pulled with a 10 N
net force.
B. A 0.5000 kg toy car is pulled with a 9 N net force.
C. A 7.000 kg metal ball is pushed by a 17 N net force.
D. A 500.0 kg truck accelerated by 1000 N net force from its engine.
10.In a grocery store, you can easily push a cart with 5 kg sack of rice than a cart with a 10 kg
sack of rice to the counter. Which of these explains the situation?
A. Law of Inertia
B. Law of Interaction
C. Law of Acceleration
D. Law of Universal Gravitation
IDENTIFYING LAWS OF MOTION
DIRECTION: Identify the law of motion that applies in each situation. Write your answers
on a separate sheet of paper.
Situation Type of Laws of Motion
1. Throwing garbage on the river would go
back to the community during the flood
season.
2. It is easier to push an empty shopping cart
than a loaded one.
3. The baseball is thrown into the air after
being hit by the bat.
4. When walking, your foot pushes the
ground backward, and the ground
pushes your foot forward.
5. A runner who reaches the finish line must
continue running for some time.
1st QUARTER
WRITTEN WORK 3
SCIENCE 8
Part I: Potential or Kinetic Energy
DIRECTION: Identify whether the objects in the given situations possess Potential Energy or
Kinetic Energy. Write your answers on a separate sheet of paper.
1. Bird flying
2. Log in a fireplace
3. Watermelon on a desk
4. Car travelling on the highway
5. Car sitting in a driveway
6. Bunch of coconut stick on a table
7. Ball bouncing on the floor
8. Child jumping on his bed
9. Child sleeping on the crib
10.Marble rolling down the ramp
Part II: Multiple Choice
DIRECTION: Choose the letter of the correct answer. Write your answers on a separate
sheet of paper.
1. The following situations demonstrate potential energy EXCEPT:
A. a bullet fired from a gun
B. a child at the top of a slide
C. a car parked at the top of a hill
D. river water at the top of a waterfall
2. The potential energy is the energy an object has due to its __________.
A. mass
B. motion
C. position
D. weight
3. The following conditions exhibits kinetic energy EXCEPT:
A. water inside a glass
B. rolling stone from the hill
C. running athlete on the field
D. dancing kids in the living room of the house
4. Which of the following quantities, when doubled, has the greatest effect on the amount of kinetic
energy?
A. mass
B. size
C. speed
D. weight
5. If a green ball is higher from the ground than a yellow ball and both have the same mass, which
ball has more potential energy?
A. green ball
B. yellow ball
C. both has the same PE
D. both has the same KE
6. Which of the following factors does not affect the amount of potential energy of an object?
A. gravity
B. height
C. mass
D. speed
7. Which happens to kinetic energy if mass is doubled?
A. doubled
B. the same
C. tripled
D. quadrupled
8. Potential energy is the energy of an object based on its ___________.
A. height and mass
B. mass and speed
C. speed and height
D. weight and speed
9. Where does a car on a hill have the greatest potential energy?
A. top of the hill
B. bottom of the hill
C. halfway down the hill
D. it has the same potential energy at all points
10. Kinetic energy is the energy an object possessed due to its ___________.
A. mass
B. motion
C. position
D. weight
1st QUARTER
WRITTEN WORK 4
SCIENCE 8
Formative Test:
Direction: Choose the letter of the best answer. Write the chosen letter before the item number.
1. Sound does not travel in space because,
a) Space is too far away. c) There is no matter in space.
b) Space is the final frontier d) Space has planets.
2. Sound travels fastest through which of these materials?
a) air b)empty space c)metal d)water
3. Sound travels fastest through________.
a) solids b) liquids c) gas d) water
4. How are light waves and sound waves similar?
a) The both are invisible. c) They both carry energy.
b) They both travel in vacuums. d) They both are harmful to cells.
5. ______ is the highness or lowness of a sound.
a) energy b) sound c) vibrate d) pitch
For item 6-10, Tell whether the statements are True or false.
6. Sound waves travel faster than light waves.
7. You can hear sound in space.
8. When the sound waves reach your ears, the air in your ears vibrate.
9. An object that vibrates quickly makes sound waves.
10. Echo is formed when sound waves bounced back and forth.
WordPuzzle
Objectives:
Be familiar with the technical terms used to describe sound waves,
Develop awareness and critical thinking in answering the cross word puzzle.
Summative Test: Multiple Choice
Directions: Choose the letter of the best answer. Write the chosen letter before the item number.
1. Sound waves can be easily detected by,
A)Human eye B) computers C) human ear D) antennas
2. Sound is a form of ___________ energy, that’s why it must travel through a medium.
A)Electrical B) electromagnetic C) light D) mechanical
3. Sound can be transmitted in all materials except, _____________.
a) air b) water c) solid d) vacuum
4. We say that sound wave is a longitudinal wave, because;
a) The disturbance moves perpendicular to the wave.
b) The period of the wave is very long
c) The disturbance moves in the same direction as the wave
d) The wave has a very low frequency
5. The region in sound wave where molecules are closed together, is called;
a) interference b) rarefaction c) compression d) polarization
6. The region in sound wave where molecules are spread out, is called;
a) compression b) rarefaction c) refraction d) interference
7. The intensity of sound wave is measured by its ___________.
a) amplitude b) pitch c) quality d) wavelength
8. The speed of sound is affected by some factors except,
a) humidity b) medium c) temperature d)time
9. Sound is formed by;
a) rarefaction b) conduction c) induction d) vibration
10. The speed of sound in air at freezing temperatures measured at,
a) 331 m/s b) 346 m/s c) 333 m/s d) 364 m/s
1st QUARTER
PERFORMANCE TASK 1
SCIENCE 8
DIRECTION: Use crayons or colored pencils to fill in the color spectrum below and label
the dispersed colors on the blank provided. (10 points)
1st QUARTER
PERFORMANCE TASK 2
SCIENCE 8
Objective:
At the end of the activity, you will be able to make a color wheel showing the wavelengths,
frequencies and energies of the colors of light.
Materials:
Color wheel pattern Folder/Any paper Cutter/Scissors Glue/Paste
Split Pin/button fastener/coconut broomstick
Procedures:
1. Cut the color wheel patterns (already distributed by the teacher) that make up the wheel found in
the next page.
2. To make it thicker, put the color wheel patterns on a folder or any paper and cut it out.
3. Cut the shapes drawn on the top wheel. The shapes which will be the small window located near
the center of the wheel should be completely cut out and removed.
4. Punch a hole at the center of the two wheels. You may use split pin/ button fastener/coconut
broomstick to secure the two wheels together one on top of the other, but both should be free to rotate
relative to each other.
5. When you see a region of the color spectrum that shows up in the open window and the
wavelength, frequency, and energy that corresponds to the region then you know that you have done it
correctly.
1st QUARTER
PERFORMANCE TASK 3 & 4
SCIENCE 8
I. PHASE CHANGE
Direction: Draw a diagram that shows the different phase changes which includes melting, freezing,
sublimation, deposition, condensation and evaporation. Put your diagram below. (20 points)
II. SERIES/PARALLEL
Directions: Draw an illustration of series and parallel circuit found in your home or within your
community. Put your illustration below and at this back of this paper. (20 points)
