Moon Tides

Waxing- the moon at any time after new moon and before full moon

A waxing moon over time reveals more of the moon and looks like its "growing".

Waning- the moon at any time after full moon and before new moon

A waning moon pattern over time starts to "decrease" in size until it is entirely shadowed.

Gibbous- seen with more than half but not all of the apparent disk illuminated

Crescent- the shape of the visible part of the moon when it is less than half full

Lunar cycle- the moon's continuous orbit around the earth and is 29.53059 days.

Earth's Seasons/ Eclipses

  •     Nicolai Copernicus changed our understanding of astronomy when he proposed that the sun, not Earth, was the center of the solar system.
  •     We have seasons because the earth is tilted as it makes its yearly journey around the sun. This means that the Earth is always "pointing" to one side as it goes around the Sun.
  •     During the winter, the sun's rays hit the Earth at a shallow angle. These rays are more spread out, which minimizes the amount of energy that hits any given spot.
  •     Moon phases are the result of the Moon's own shadow.
  • When the shadow of Earth moves across the Moon, we call it a lunar eclipse. When the Moon moves between Earth and the Sun, it casts a small shadow on Earth, and people inside that shadow see a solar eclipse.
  • Earth rotates on its axis, and the fact that this axis is tilted.
  • Earth’s rotation occurs from west to east, which is why the Sun always appears to be rising on the eastern horizon and setting on the western.
  •     The time or date (twice each year) at which the sun crosses the celestial equator.
  •     Either of the two times in the year, the summer solstice and the winter solstice, when the sun reaches its highest or lowest point in the sky at noon.

Plate Tectonics

  •     Alfred Wegener was a German polar researcher, geophysicist and meteorologist. He proposed that the continents had once been joined, and over time had drifted apart.

  • Convergent-
    coming closer together.
  • Divergent-
    Tending to be different or develop in different directions.
  • Transform Boundary-
    Two tectonic plates that slide alongside each other.
  • Large convection currents in the aesthenosphere transfer heat to the surface, where plumes of less dense magma break apart the plates at the spreading centers, creating divergent plate boundaries.
  • Rift Zone-
    Feature of some volcanoes, especially shield volcanoes, in which a linear series of fissures in the volcanic edifice allows lava to be erupted from the volcano's flank instead of from its summit.
  • Subduction Zone-
    Biggest smash-up on Earth, marking the collision between two of the planet's tectonic plates, the pieces of crust that slowly move across the surface over millions of years. Juan De Fuca plate.
  • The Juan De Fuca changes the sea floor by spreading it out and creating new sea floor. That also makes the chance of earthquakes slimmer and slimmer, therefore decreasing the amount of earthquakes in the cascade area.
  • The Channeled Scabland was created when the Ice Age floods accelerated across the tilted surface of the Palouse slope, causing massive erosion. Much of the eroded sediment was carried all the way to the Pacific Ocean.