Everyday Science Mcqs

The SI standard of time is based on_____________
  • (A)  the daily rotation of the earth
  • (B)  the frequency of light emitted by Kr86
  • (C)  the yearly revolution of the earth about the sun
  • (D)  a precision pendulum clock
  • (E)  none of these
What causes the Moon's phases
  • (A)  The Sun lights up only one half of the Moon and as the Moon orbits the Earth we can sometimes see the unlit side of the Moon.
  • (B)  The Sun lights up only one half of the Moon and as the Sun orbits the Earth we can sometimes see the unlit side of the Moon.
  • (C)  The Earth's shadow falls on the Moon, blocking the sunlight.
  • (D)  The Moon's shadow falls on the Earth, blocking the sunlight.