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    Grade 8 Science Monthly Test

    Uploaded by

    Jam Astrero
    This document contains a science test for grade 8 students with questions about concepts in motion including force, work, energy, and Newton's laws of motion. It has 20 multiple choice questions and 10 short answer identification questions covering topics like forces, motion, energy, work, and power.

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    © All Rights Reserved
    Download as DOCX, PDF, TXT or read online from Scribd

    Grade 8 Science Monthly Test

    Uploaded by

    Jam Astrero
    39 views4 pages
    This document contains a science test for grade 8 students with questions about concepts in motion including force, work, energy, and Newton's laws of motion. It has 20 multiple choice questions and 10 short answer identification questions covering topics like forces, motion, energy, work, and power.

    Original Title

    Grade 8 Science Monthly test (1)

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    © © All Rights Reserved

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    This document contains a science test for grade 8 students with questions about concepts in motion including force, work, energy, and Newton's laws of motion. It has 20 multiple choice questions and 10 short answer identification questions covering topics like forces, motion, energy, work, and power.

    Copyright:

    © All Rights Reserved
    Download as DOCX, PDF, TXT or read online from Scribd
    Download as docx, pdf, or txt
    39 views4 pages

    Grade 8 Science Monthly Test

    Uploaded by

    Jam Astrero
    This document contains a science test for grade 8 students with questions about concepts in motion including force, work, energy, and Newton's laws of motion. It has 20 multiple choice questions and 10 short answer identification questions covering topics like forces, motion, energy, work, and power.

    Copyright:

    © All Rights Reserved
    Download as DOCX, PDF, TXT or read online from Scribd
    Download as docx, pdf, or txt
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    1st Monthly test in

    Grade 8 Science
    IDENTIFICATION: Identify the following.
    __________1. Push or pull; required to change an object’s motion.
    __________2. an English scientist and mathematician famous for his discovery of the
    law of gravity also discovered the three laws of motion.
    __________3. An object at rest remains at rest and an object in motion remains in
    motion at constant speed and in a straight line unless acted on by an unbalanced force.
    __________4. For every force, there is an equal and opposite force.
    __________5. An object depends on the mass of the object and the amount of the force
    applied.
    __________6. It is done when a force causes an object to move in the direction that the
    force is applied.
    __________7. The rate at which work is done.
    __________8. Work is measured in
    __________9. Power is measured in
    __________10. Ability to cause change; can change the speed, direction, shape, or
    temperature of an object.

    MULTIPLE CHOICE: Choose the letter of the correct answer.


    1. When the jeepney you are riding suddenly turns right, your body tends to move to the
    opposite direction. What law of motion is shown in this situation?
    a. law of inertia c. law of gravitation
    b. law of interaction d. law of acceleration
    2. When you brush your teeth, you exert force on the brush. Which of the following best
    describes the reaction force?
    a. The brush exerts the same force on your hand.
    b. Your teeth exerts the same force on the brush.
    c. The brush exerts the same force on your teeth.
    d. Your teeth exerts the same force on your hand.
    3. How much force is needed to lift an object with a mass of 100 kg?
    a. 980 N c. 10.20 N
    b. 100 N d. 0.09 N
    4. What would be the acceleration of a body if the force applied on it is doubled while
    the mass remains constant.
    a. 2a
    b. 4a
    c. a
    2

    d. a
    4
    5. Why do objects fall to the ground?
    a. They are pulled by the air.
    b. They are pulled by the moon.
    c. They go back to their natural place.
    d. They are pulled by Earth’s gravity.
    6. What would be the effect on the acceleration of an object of a given mass if you
    double the unbalanced force acting on it?
    a. doubled
    b. increased fourfold
    c. increased by one-half
    d. increased by one-fourth
    7. Which group usually wins in a tug-of-war?
    a. It depends on the force applied.
    b. The group that pulls the rope harder.
    c. The group that pushes the ground harder.
    d. None of the above.
    8. Which is the correct and complete equation for Newton’s law of motion?
    a. a = F net /m c. a = Fnet .m
    b. F = ma d. m = F/a
    9. Which of the following is the measure of one’s inertia?
    a. mass c. weight
    b. speed d. acceleration due to gravity
    10. Which of the following forces is stronger?
    a. interaction c. reaction force
    b. action force d. none of the above
    11. The common unit for work done and energy is joule. Which of the following units is
    equivalent to joule?
    a. N.m c. N2m2
    b. Nm2 d. kg. m/s2
    12. How much work is done on a chair if 50 N is used to lift it by 1 m?
    a. 0.02 N.m c. 5.00 N.m
    b. 0.20 N.m d. 50.0 N.m
    13. If the speed of an object is doubled, what happens to its kinetic energy?
    a. halved c. doubled
    b. tripled d. quadrupled
    14. In which of the following situations is work not done?
    a. a waiter carrying a tray toward
    b. a truck pulling a trailer along the road
    c. a soccer player kicking a ball across the field
    d. a powerlifter raising a barbell above his head
    15. If you increase the distance an object moves, what happens to its power?
    a. increases c. no change
    b. decreases d. a change in work only
    16. When is the body’s gravitational potential energy equal to zero?
    a. when h = 0 c. when m = 60 kg
    b. when h = 50 m d. when m = 50 kg
    17. Which of the following units is/are the SI unit/s of power?
    a. watt c. horsepower
    b. kilowatt d. all of the above
    18. Which of the following quantities has the greatest influence on the amount of kinetic
    energy that a car has while moving down the highway?
    a. 50 J c. 490 J
    b. 60 J d. 600 J
    19. An acrobat who has a mass of 50 kg jumps to a height of 1 m. What is his potential
    energy at the highest point?
    a. 50 J c. 490 J
    b. 60 J d. 600 J
    20. What is the speed of a 1kg mass if it has a kinetic energy of 1 J?
    a. 0.45 m/s c. 1.41 m/s
    b. 1.00 m/s d. 4.40 m/s

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