Lunar Cycle and Ocean Tides
#Rockinreview
Kaitlin Federman- 6th period

Moon Phases:

Ocean Tides

Definitions:

Waxing: The moon at anytime after the new moon (illuminated area is increasing).

Waning: The moon after the new moon and before the full moon (its illuminated area is decreasing).

Gibbous: Illuminated part of the moon greater than a semicircle and less than a circle.

Crescent: The curved sickle shape of the waxing or waning moon.

Patterns:

Waning moon: A crescent on the left side of the moon.

Waxing moon: A crescent on the right side of the moon.

Lunar Cycle:

Definition: A cycle of 235 synodic months, about 19 years, after which the new moon occurs on the same day of the year as the begging of the cycle with perhaps a shift of one day, depending on the number of leap years in the cycle.

Earth's Season/Eclipses
#eclipses
Who was Copernicus?

Nicolia Copernicus (1473-1543) studied the solar system, and proved the Babylonians, the Mayas, and other ancient cultures wrong by stating that the Earth wasn't the center of the solar system, but the sun was.

Why are there seasons?

Seasons occur because the Earth rotates on a titled axis, and that 23.5 degree tilt allows different hemispheres to be at different angles to the sun at different times of the year.

Why isn't it warmer in the winter?

You would think that since the sun is closer to the Earth in the winter time that it would be much warmer but its not. This is because during the winter time the energy the sun gives off must travel through more atmosphere to reach the Earth, and it has to spread over a very large amount of land equally, which makes it colder.

Why aren't there Lunar Eclipses Every Month?

Even though there is a full moon every month, lunar eclipses aren't monthly because the sun isn't exactly in line with the moon and Earth every month. If the moon's axis wasn't titled 5 degrees more than Earth's, then we would see a lunar eclipse every month.

Why do we have day and night?

We experience day and night because of the Earth's rotation. When one side of the Earth faces the sun, the other side doesn't, which makes it dark. Then when the Earth spins on its axis, the dark and light halves of the the Earth switch, and then it repeats.

Definitions:

Solstice- Marks the point at which the poles are titled at their maximum away, or toward the sun.

Equinox- The time or date at which the sun crosses the celestial equator, when day and night are of equal length.

Plate Tectonics
#platetectonics

-Alfred Wegner- Was the scientist who proposed the Continental Drift Theory in the early twentieth century.

Definitions:

-Convergent boundaries- coming closer together, especially in characteristics or ideas.

-Divergent boundaries- tending to be different or develop in different directions.

-Transform boundaries-a strike-slip fault that offsets a mid-ocean ridge inopposing directions on either side of an axis ofseafloor spreading.

Boundaries:

What tectonic plate is just off the coast of Washington?

-The Juan de Fuca plate is the tectonic plate that is just off the coast of washington.

What role does that tectonic plate have on the formation of the cascades?

The Cascades volcanoes define the Pacific Northwest section of the ‘Ring of Fire', a fiery array of volcanoes that rim the Pacific Ocean.Not far off the coast of the North Pacific lies a spreading ridge; a divergent plate boundary made up of a series of breaks in the oceanic crust where new ocean crust is created.

Convection currents

Convection currents under Earth's surface may cause magma to rise, which causes the sea floor to spread apart.

Definitions:

-Rift zone- a 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- is the 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. When two tectonic plates meet, one may slide underneath the other, curving down into the mantle.

Channeled Scablands

The Channeled Scablands are a barren, relatively soil-free landscape in eastern Washington, scoured clean by a flood unleashed when a large glacial lake drained. They are a geologically unique erosional feature in the U.S. state of Washington.

Rocks and roles
#rocksandroles #tackkthursday #throwbackthursday

Definitions:

-Sedimentary- are types of rocks that are formed by the deposition of material at the Earth's surface and within bodies of water.

-Metamorphic- a rock that was once one form of rock but has not changed  to another under the influence of heat, pressure, or some other agent without passing through a liquid phase.

-Igneous- is formed through the cooling and solidification of magma or lava.

Examples of each rock

-Sedimentary- Rock salt, some limestones and sandstone.

-Metamorphic- Marble, gneiss and phyllite.

-Igneous-  Granite and basalt.

Stratification:

-a system or formation of layers, classes, or categories.

-Rock layers tend to be older since more sediment has turned into rock over time. That is why the older rock layers are on the bottom of younger rock layers.

-When the asteroid landed on earth and wiped out the dinosaurs the layers of rock in that area of land could have moved around due to the enormous weight and the force of the rock.

-They can create or add on to land. Specifically coral reefs are created by the living organism "coral". Over thousands to millions of years, they form massive structures of limestone that after the shoreline  of continents.