Earth from a larger Perspective Flashcards
a stony meteorite that haven’t undergone melting, spherical silicate
chondrites
is a long-surmised and recently (1992) confirmed outer asteroid belt of rock and ice objects orbiting beyond Neptune
Kuiper Belt
fixed face of the of a moon that we always see
titan lock
The burning of helium to produce heavier elements then continues for about 1 million years. Largely, it is fused into carbon via the triple-alpha process in which three helium-4 nuclei (alpha particles) are transformed. The alpha process then combines helium with carbon to produce heavier elements, but only those with an even number of protons.
Fusion of Heavier Elements
Name 3 changes in Earth’s movement and how long it takes.
Changes in Eccentricity (shape) - 100,000-year cycle (varies between 0.0034 to 0.058
Changes in obliquity (tilt) - 41,000-year cycles (22.1-24.5 degrees relative to the orbital plane
axial precession (wobble) - 26,000-year cycles
Our ____ consists of 8 planets, more than 100 moons, a belt of asteroids, and millions of comets, all of which orbit the Sun
solar system
They found an unusually high amount of ____ in sedimentary rocks laid down at the K–Pg boundary.
iridium
Paleontologists have discovered evidence of bacteria in rocks as old as ____ billion years
3.6
are variable stars which show both periodic and random fluctuations in their brightnesses.
T-Tauri Phase
contains large crystals of olivine, gem grade, yellow to orange-yellow
pallasites
asteroid belts large asteroids achondrites
Howardite-Eucrite-Diogenite (HED)
If the remnant of the explosion is 1.4 to about 3 times as massive as our Sun, it will become a neutron star
supernova
is the primary driver of Earth’s climate system
sun
age of the moon
4.5 million years old
Many astronomers regard __ as merely the largest of the Kuiper Belt objects
Pluto
ordinary chondrite, found in lanao central mindanao, brecciated
Pantar Meteorite
the moon minimizes Earth’s wobble in the axis which has helped ___ seasonal extremes between summer and winter.
reduced
combination of _____ causes ozone molecules (O3) to chemically break down into free oxygen (O2)
CFCs and UV radiation
nuclear reactions within the Sun release what is known as
electromagnetic radiation
hydrogen and he gas percentage in the Composition of the Solar System
98%
achondrite that has retained its chrondic characteristics
primitive
white, CA rich anorthosite that is visible on the moon
lunar highlands
a stony meteorite that has undergone partial melting
achondrites
is the pattern that appears when the actual brightness (or absolute magnitude) and color (or color index) of many stars are plotted against each other.
Hertzsprung-Russell diagram