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    Earth, Moon, and

                                    12                                                  the Sun

                                               computational thinking quest

                    Tick ( ) the correct option.

                      1.  While  sitting  on a merry-go-round  rotating     3.  From the  diagram,  why does  the  Northern
                         anti-clockwise,  a  tree  appears  to  move          Hemisphere experience summer in June?
                         clockwise. This observation helps us conclude                                (Abstract Thinking)
                         that                     (Abstract Thinking)                                 Vernal Equinox
                                                                              Summer                    20 March
                                (a)   the Sun actually moves across the       Solstice
                                   sky from East to West.                     21 June           Spring
                                                                                        Summer          Winter
                                (b)   the Earth rotates clockwise when
                                   viewed from the North Pole.                                  Autumn          Winter
                                                                                                                Solstice
                                (c)   apparent motion of objects               Autumnal Equinox              21 December
                                   is opposite to the observer’s                   23 September
                                   rotation.                                        (a)  Earth is closest to the Sun

                                (d)  the Earth’s axis is tilted at 23.5°.           (b)   Axis  tilt  causes  more direct  rays
                                                                                       and longer daylight
                      2.  When viewed from above the North Pole, the                (c)  Orbit is elongated
                         Earth rotates anti-clockwise. Which everyday
                         examples best models this motion?                          (d)   Southern Hemisphere blocks sunlight
                                                  (Abstract Thinking)      4.  The Foucault pendulum demonstrates Earth’s

                                                                              rotation because:       (Abstract Thinking)
                                (a)   A spinning top observed from
                                   above.                                           (a)   The pendulum bob itself rotates
                                                                                       with the Earth’s axis
                                (b)   A pendulum swinging back and
                                                                                    (b)   The pendulum swings in a fixed
                                   forth.
                                                                                       plane while Earth rotates beneath it
                                (c)   A ball rolling on the ground.
                                                                                    (c)   The pendulum’s length determines
                                                                                       the Earth’s rotational speed
                                (d)  A car moving in a circular track.
                                                                                    (d)   The pendulum bob is magnetically
                                                                                       aligned with the poles

                    90         Computational Thinking-7 (Science)

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