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Forces and Motion

Developing Essential Skills for State Standards

Gravity: K-12 TLC Guide

Quests Quests
PAGE ONE
What Is Force? 		PAGE TWO
Unbalanced Forces 		PAGE THREE
Mass and Inertia 		PAGE FIVE
Friction 		PAGE SIX
Drag 		PAGE SEVEN
Erosion
Answer Sheet State Standards Quest Archive
PAGE FOUR: Gravity
  1. Use this explanation of gravity from the University Corporation for Atmospheric Research to answer these questions:
    2.

    1. Gravity is:

        2. A.    A pulling force.
        B.    A pushing force.
        C.    Both a pushing and a pulling force.
        D.    Not a force.

    2. Which of the following exerts the greatest force of gravity?

        3. A.    A ping pong ball.
        B.    An apple.
        C.    The Moon.
        D.    The Earth.
        E.    The Sun.

    3. Which of the following statements is true?

        4. A.    Gravity only acts through air, not through land or sea.
        B.    Gravity does not act on flying airplanes.
        C.    Gravity always pulls objects toward the center of the Earth.
        D.    All of the above.
        E.    None of the above.

    4. If gravity is pulling you toward the center of the Earth, why doesn't it pull you through the pavement?

        5. A.    The pavement blocks the effect of gravity.
        B.    The pavement exerts an equal force in the opposite direction.
        C.    Gravity is weaker than the pavement.
        D.    All of the above.
        E.    None of the above.



  2. Use this screen from the BBC to test using a gradient to move the trucks and to answer these questions:
    3.

    1. A gradient is:

        2. A.    A flat surface.
        B.    An inclined surface.
        C.    A force.
        D.    All of the above.
        E.    None of the above.

    2. What force caused the trucks to move off the gradient?

        3. A.    A push.
        B.    A pull.
        C.    Gravity.
        D.    Wind.



  3. Play Lunar Lander and use your observations to answer these questions:
    4.

    1. The Lunar Lander is falling because of:

        2. A.    Mass.
        B.    Inertia.
        C.    Gravity.
        D.    None of the above.

    2. The Lunar Lander continues to fall even after you have fired the landing thruster because of:

        3. A.    Mass.
        B.    Inertia.
        C.    Gravity.
        D.    None of the above.

    3. The Lunar Lander continues to lift even after you have turned off the landing thruster because of:

        4. A.    Mass.
        B.    Inertia.
        C.    Gravity.
        D.    None of the above.

    4. The Lunar Lander drops faster on Jupiter than on the Moon, because:

        5. A.    Of Inertia.
        B.    Jupiter has greater mass and a greater gravitational force than does the Moon.
        C.    The Moon has greater mass and a greater gravitational force than does Jupiter.
        D.    None of the above.

TO PAGE THREE: Mass and Inertia TO PAGE FIVE: Friction
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This TLC Quest last edited 01/13/2007
This TLC Quest last revised 12/31/2006
This TLC Quest created 12/31/2006