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Sun/Moon/Earth Study Guide Answers

Sun/Moon/Earth Study Guide Answers. Axis. The imaginary line that the Earth spins on. Rotate. to spin on an axis. Revolve. to move around the Sun. Luminous. to create its own light. Illuminated. Not a light source, reflects light. Opaque.

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Sun/Moon/Earth Study Guide Answers

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  1. Sun/Moon/Earth Study Guide Answers

  2. Axis • The imaginary line that the Earth spins on

  3. Rotate • to spin on an axis

  4. Revolve • to move around the Sun

  5. Luminous • to create its own light

  6. Illuminated • Not a light source, reflects light

  7. Opaque • an object that does not let light pass through

  8. Know what causes day and night and how long it takes. • Day and Night are caused by the rotation of the Earth on its axis every 24 hours. • The side of the Earth that is facing the Sun is in day. • Due to the fact that the Earth is an opaque object, the side that is not facing the Sun is in night.

  9. The Sun rises in the East and sets in the West.

  10. Be able to explain what causes a year and how long it takes. • Years are caused by the revolution of the Earth around the Sun. • It takes about 365 days for the Earth to complete 1 revolution or 1 year.

  11. Know the relative positions of the earth, the sun and the moon.

  12. Know which objects in the Solar System are luminous and which are illuminated.

  13. Know how much of the Earth is in daylight and how much is in darkness at any given time. • 1/2

  14. Know how long it takes to complete 1 lunar cycle • About 1 month

  15. Know why there are different moon phases. There are different moon phases because… • the Moon revolves around the Earth • the Moon reflects the Sun’s light • it appears to change depending on the position of the Earth, Sun & Moon

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