Earth Science

6. When the sun starts rising and the ocean starts receding.
9. a rigid layer of the Earth's crust that is believed to drift slowly.
10. a body of water flowing in a channel or watercourse, as a river, rivulet, or brook.
13. the movement or study of the movement of Earth's crust
15. Happens when the Moon passes between the Sun and Earth.
16. movement of the edge of one tectonic plate under another.
17. the branch of geology studying the folding and faulting of the earth's crust.
18. a space of partial illumination between the perfect shadow on all sides and the full light
19. the tidal phase during which the tidal current is flowing seaward

1. the second layer of a star's atmosphere, located above the photosphere and below the solar transition region and corona.
2. water at its lowest level, as in a stream
3. When a tidal current moves toward the land and away from the sea
4. the bottom of a sea or ocean.
5. The oldest eon and dates from 4.5–4.0 billion years ago.
7. coldest season of the year, between autumn and spring.
8. an occasion when the sun looks like it is completely or partially covered with a dark circle because the moon is between the sun and the Earth.
10. the season between winter and summer.
11. The third season of the year, coming after summer and before winter.
12. a period of moderate tides when the sun and moon are at right angles to each other.
14. The warmest season of the year