Lecture2_2011.keyr

Lecture2_2011.keyr -...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: http://scrippseducation.ucsd.edu/faculty/driscoll/water Different regions of California clearly have different precipitation patterns. Different levels of precip, rain vs. snow…affects how water moves across the landscape. Point out North Coast, Sierras and Central Valley, Mojave (South Lahontan), Colorado River region… Note most of the Central Valley receives very little rainfall… 2/3 of all rainfall in NoCal; 2/3 of population in Central & SoCal Different regions of California clearly have different precipitation patterns. Different levels of precip, rain vs. snow…affects how water moves across the landscape. Point out North Coast, Sierras and Central Valley, Mojave (South Lahontan), Colorado River region… Note most of the Central Valley receives very little rainfall… Normal conditions El Nino Different regions of California clearly have different precipitation patterns. Different levels of precip, rain vs. snow…affects how water moves across the landscape. Point out North Coast, Sierras and Central Valley, Mojave (South Lahontan), Colorado River region… Note most of the Central Valley receives very little rainfall… Water in the Universe Big Bang Life cycle of a star – stellar processes Elemental solar abundance Fusion vs Fission Birth of the Solar System Water on planets and moons Comets Dihydrogen Monoxide Big Bang In 1927, the Belgian priest Georges Lemaître was the first to propose that the universe began with the explosion of a primeval atom. 1964 by Arno Penzias and Robert Wilson- background radiation Penzias and Wilson began looking for theoretical explanations. Around the same time, Robert Dicke (1916-1997) at nearby Princeton University had been pursuing theories about the big bang. He had elaborated on existing theory to suggest that if there had been a big bang, the residue of the explosion should by now take the form of a lowlevel background radiation throughout the universe. Dicke was looking for evidence of this theory when Penzias and Wilson got in touch with his lab. He shared his theoretical work with them, even as he resignedly said to his fellow-researchers, "We've been scooped." http://www.youtube.com/watch?v=U0kXkWXSXRA http://scrippseducation.ucsd.edu/faculty/driscoll/water Stellar Nebulae Super Nova Solar Elemental Abundances -----------------------------------------------------------------------Element Number % Mass % -----------------------------------------------------------------------Hydrogen 92.0 73.4 Helium 7.8 25.0 Carbon 0.02 0.20 Nitrogen 0.008 0.09 Oxygen 0.06 0.8 Neon 0.01 0.16 Magnesium 0.003 0.06 Silicon 0.004 0.09 Sulfur 0.002 0.05 Iron 0.003 0.14 What controls the abundance of Elements in the Earth? What controls the abundance of Elements in the Solar System? What controls the abundance of Elements in the Solar System? Fusion Fusion continues for heavy elements just at a faster rate Fision Birth of our solar system Because the collapsing cloud is rotating, the collapse is inhibited in the plane of rotation. The gravitational collapse is uninhibited along the axis of rotation. The result of this asymmetric collapse is a flattened disk that is rotating around the central protostar. Evidence for Water Stony Planets Gassy Planets Evidence for Water in Our Solar System?? Because the collapsing cloud is rotating, the collapse is inhibited in the plane of rotation. The gravitational collapse is uninhibited along the axis of rotation. The result of this asymmetric collapse is a flattened disk that is rotating around the central protostar. Comets are found in two main regions of the solar system: the Kuiper Belt and the Oort Cloud. There are two types of comets: short-period comets and long-period comets. ShoemakerLevy9 comet Halley’s comet Water Use Chart In addition to filling out the chart, please do the following: How did you ascertain if the toilets and showers are low flow (Gallons/per minute)? List three ways you can conserve water. Mars There are polar ice caps on Mars that get larger during the Martian winter and smaller in the summer. The ice caps are largely composed of frozen carbon dioxide, but small amounts of water-ice have also been detected. Vallis Marinaris • bedforms - ripples • evaporites - salt deposits Water Ripples on Mars?? Area of Exploration: What Can We See? Area of Exploration: Ius Chasma Canyons suggest erosion - maybe water?? Area of Exploration: Melas Chasma Area of Exploration: Candor Chasma Area of Exploration: Ophir Chasma Area of Exploration: Coprates Chasma Europa Impact craters on Europa -- the jovian satellite that scientists say may hide a subsurface liquid ocean -- show that the moon's brittle ice shell crust is more than 3 to 4 kilometers (1.8 to 2.4 miles) thick. Cracks are thousands of km long, but none of these features are higher than a few kilometers on Europa, making it one of the smoothest objects in our Solar System. What causes cracks and blocks? ...
View Full Document

{[ snackBarMessage ]}

Ask a homework question - tutors are online