1) Tide a) changes in ocean level caused by pull of gravity between Earth and its moon b) The spinning of Earth on its axis. Earth rotates once every 24 hours. c) The changing appearances of the Moon as seen from Earth d) The time between sunrise and sunset e) the period of time of darkness between sunset and sunrise f) an instrument showing the time by the shadow of a pointer cast by the sun onto a plate marked with the hours of the day. 2) Compass a) an instrument showing the time by the shadow of a pointer cast by the sun onto a plate marked with the hours of the day. b) the time between sunrise and sunset c) the tool that uses the natural magnetism of the earth to show direction d)   3) Shadow a) changes in ocean level caused by pull of gravity between Earth and its moon b) an instrument showing the time by the shadow of a pointer cast by the sun onto a plate marked with the hours of the day. c) An area from which light is blocked. 4) High Tide a) The time at which the tide reaches its highest level b) The time at which the tide reaches its lowest level c) The spinning of Earth on its axis. Earth rotates once every 24 hours. 5) Rotation a) The spinning of Earth on its axis. Earth rotates once every 24 hours. b) one complete trip around the sun c) The changing appearances of the Moon as seen from Earth

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