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Lahar vs. Undefined Lahar vs. other debris flows Lahar flows and their depositional environment are hard to distinguish from their non-aqueous cousins. The main difference between a mudflow and a clay rich lahar flow is the presence of volcanic material. Pyroclastic flows are more difficult to differentiate from a lahar debris flow that does not have more than 7% clay minerals. This is because they both have a volcanic origin. The main difference is that a lahar is saturated with water, and contains very little volcanic glass, where as pyroclastic flows tend to contain a lot of volcanic glass and little to no moister. A Pyroclastic flow can turn into a lahar if it encounters a large body of water. Pyroclastic Flows Pyroclastic flows are mostly formed of volcanic gases that carry Huge amounts of volcanic material downhill similar to an avalanche. Mudflows A mudflow occurs when unconsolidated sediment is saturated with water or other low viscosity liquid.

2015 Tide Table for Lincoln City (Siletz Bay), Oregon for fishing <º(((>< Tide tables and solunar tables for sport fishers in Lincoln City (Siletz Bay). Find out the forecast for high tides and low tides before setting out to fish, and other fishing-related data such as the lunar phase, tidal coefficient, sun and moon rising and setting times, hours of maximum fish activity, weather conditions in Lincoln City (Siletz Bay) ... We want you to enjoy to the max a well-planned fishing expedition! Good luck! Tide Chart: high tides and low tides in Lincoln City (Siletz Bay) today The tidal coefficient today is 116. Solunar chart for Lincoln City (Siletz Bay) The solunar fishing calendar in Lincoln City (Siletz Bay) tells us that today is an excellent day for fishing, the fish activity forecast is very high.

Tide timetable for Lincoln City (Siletz Bay) March 2015 Tide timetable for Lincoln City (Siletz Bay) . [ 0 low activity ] , [ average activity ] , [ high activity ] , [ very high activity ] Fishing locations close to Lincoln City (Siletz Bay) Map Data Map data ©2015 Google Map. What Did the Continents Look Like Millions of Years Ago? - Geoff Manaugh & Nicola Twilley. The paleo-tectonic maps of retired geologist Ronald Blakey are mesmerizing and impossible to forget once you've seen them. Catalogued on his website Colorado Plateau Geosystems, these maps show the world adrift, its landscapes breaking apart and reconnecting again in entirely new forms, where continents are as temporary as the island chains that regularly smash together to create them, on a timescale where even oceans that exist for tens of millions of years can disappear leaving only the subtlest of geological traces. With a particular emphasis on North America and the U.S. southwest—where Blakey still lives, in Flagstaff, Arizona—these visually engaging reconstructions of the Earth's distant past show how dynamic a planet we live on, and imply yet more, unrecognizable changes ahead.

These images come from Ron Blakey's maps of the paleotectonic evolution of North America. But I was late getting into the computer. Another thing I started doing was putting these maps into presentations. Holistic Lifestyle Community Blog: Climate Change: Causes and Effects. This post is a discussion of how the climate can change. For general discussion of the current change in Earth's climate, see post Global Warming: Planet in Peril? "Weather can be hot or cold, dry or wet, calm or stormy, clear or cloudy. Climate is the average weather in a place over a long period of time. Changes in climate may be due to natural forces or from human activities. Today climate changes are happening at an increasingly rapid rate. Climate change is altering weather and climate patterns that previously have been relatively stable. Climate change is a significant and lasting change in the statistical distribution of weather patterns over periods ranging from decades to millions of years.

Scientists actively work to understand past and future climate by using observations and theoretical models. The most general definition of climate change is a change in the statistical properties of the climate system when considered over long periods of time, regardless of cause. Causes. Your insight into science. From the deep sea vents of the Cayman Trough to the shield volcanoes of the Hawaiian islands, Earth Scientists explore the structures and processes that define our world, the forces that continue to sculpt it, and how these processes have interacted over the last 4.6 billion years of Earth’s history. Our Earth science modules introduce how scientists use detailed observations, modeling, and comparative studies to develop their understanding of plate tectonics, the foundational theory of the Earth sciences, as well as biogeochemical cycles, the structure of the Earth and its atmosphere, and rocks and minerals. This module addresses the rock cycle, including the historical development of the concept.

The relationships between uniformitarianism, the rock cycle, and plate tectonics are explored both generally and through the specific example of the Cascade Range in the Pacific Northwest. Powered by the sun, water constantly cycles through the Earth and its atmosphere. Biogeochemical cycles. Biogeochemical cycles are pathways for the transport and transformation of matter within four categorical areas that make up planet Earth (biosphere, hydrosphere, lithosphere, and the atmosphere). Source. Biogeochemical cycles are components of the broader cycle that govern the functioning of planet Earth.

The Earth is a system open to electromagnetic radiation from the sun and outer space, but is a virtually closed system with regard to matter. This means that the planet has minimal flux of matter, other than meteorite collisions and minor amounts of intergalactic particle trapping (or loss) by the upper atmosphere. Therefore, matter that Earth contained from the time of its birth is transformed and circulated geographically. This is in line with the law of conservation of matter which states that matter cannot be created nor destroyed but can be transformed including the transformation between matter and energy Pathways of biogeochemical cycles 1.

The importance of biogeochemical cycles. Are You suprised ? Lesson Title: Making Solutions is Simple Objective: This lesson will focus on concepts in multiplication, division and will orient students to simple concepts in algebra and chemistry and biology Materials: Graduated cylinders 100 ml Food coloring Sugar Salt Distilled Water Workup Solution chemistry is simple.

Demonstrate this simple exercise. Concentrations The next exercise will involve sugar. Beginning Concentration X Beginning Volume = Ending Concentration X Ending Volume VBegin x CBegin = VEnd x CEnd At this point, present this equation on the chalk board. So we have VBegin = 60 ml and CBegin = 0.04g/ml. Salinity Next introduce the concept of salinity. The salinity of seawater is typically in the range of about 33-35 parts per thousand (ppt). 100 ml of water will weigh 100 grams. To demonstrate the concept of salinity ppt lets begin by making a solution that is 100 ppt. Fill a 100 ml graduated cylinder with 100 ml of distilled water. Next weigh 10 grams of salt and add it to the water. Dilution. Water Weight Conversion. How Much Does a Gallon of Water Weigh? | ChemistryTwig. Oddly enough, I am often asked how much a gallon of water weighs. I’ve heard guesses anywhere from 5 pounds to 15 pounds.

How much does a gallon of water really weigh? The simple answer is that a gallon of water weighs about 8.3 pounds. However, this answer comes with a caveat. Someone trying to be smart with you (or just taking the question literally) may tell you that it’s a trick question that has no answer the way it was asked. They may also simply ask for the temperature of the water.

The thing is, assuming we are talking about liquid water, the weight per gallon, referred to as the density, of water will fluctuate with temperature. Now, imagine you have a gymnasium and you draw a square on the floor that fills half the gymnasium. You get people moving. Hope this will help clear up any questions about the weight of a gallon of water! [Photo Credit] David Mulder About The Author Marc. Index of /info/Science. A Journey through Climate History. Accelerating Voltage Physics Calculator. Dolores Gende: Environmental Science, Chapter 3. Fig. 3.10 The same principle of storage and release of potential energy applies to ecosystems. Matter, Energy and Life Fig. 3.1 From a biological point of view, the three most important gases of the lower atmosphere are nitrogen, oxygen, and carbon dioxide. Fig. 3.2 Water consists of molecules, each of which is formed by two hydrogen atoms bonded to an oxygen atom (H2O).

In water vapor, the molecules are separate and independent. Fig. 3.5 The organic molecules making up living organisms are larger and more complex than the inorganic molecules found in the environment. Fig. 3.3 The atoms of most elements gain or lose one or more electrons, becoming negative (-) or positive (+) ions. Fig. 3.6 Biological systems include levels of complexity beginning with atoms and molecules and broadening up to the biosphere. Fig. 3.7 Kinetic energy is energy in one of its active forms.

Fig. 3.8 Any form of energy can be converted to any other form, except heat energy. IV. A. B. 1. Warming. 4. IV. 1. Faculty of Science / Current students / Educational resources. National Science Week posters National Science Week (NSW) is a countrywide celebration of science which aims to highlight the importance of science in people's daily lives. The theme for 2012 is"The Role of Science in Economic Development". This annual country-wide event is led by the Department of Science and Technology (DST), and supported by the South African Agency for Science and Technology Advancement (SAASTA).

It is aimed at highlighting the important role science plays in everyday life and attracting the country's youth to enter and remain in science related studies and careers. The Science Faculty at UCT has for the last six years participated in NSW by producing high quality, scientifically up-to-date posters which are distributed to schools and used as a resource for teachers, learners and educators. Click on the images to enlarge. back to top.