the first and upper most layer of the Earth. There is Continental Crust which sits on top of Oceanic Crust. This layer is made frequently from granite rocks and is solid. Continental Crust is approximately 32km. Below the Continental Crust is Oceanic Crust. It is about 8km. This part of the Crust is made from basalt rocks. The Crust is most of lithosphere and is the coolest layer by far. Mantle is like silly putty consistency. It is the largest layer of Earth sitting under the Crust. It is made
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crust). The lower mantle runs slowly‚ at a rate of a few centimeters per year. 3. Core: The Earth has an iron-nickel core that is about 2‚100 miles in radius. At the core-mantle boundary‚ composition changes. Seismic waves suggest this material is of a very high density (10-13 g/cm3)‚ which can only correspond to a configuration of metals rather than rock. The presence of a magnetic field around the earth also indicates a molten metallic core. Unlike the crust and the mantle‚ we don’t have any samples
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naturally occurring; Synthetic Diamond: NO – Manmade; Water: NO – liquid state‚ only a solid material can be considered a mineral – in it’s naturally occurring ice state it is a solid and therefore a mineral; Wood: NO – organic‚ living material. How are rocks different from minerals: rock is lithified aggregate of a mineral. Rocks may contain multiple minerals as well as organic matter whereas minerals are a singular substance. ATOM: Electrons‚ Protons & Neutrons: Pro & neu heavier particles
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Life on Mars and Life on Earth • Life on Earth - Right spot‚ suitable for life - Size of earth has allowed the internal heat from leaking too rapidly - Plate tectonic activity and bulkinism helps maintain and recycle carbon dioxide which helps prevent the earth from freezing - The magnetic field from the inner core maintains heat at a certain level protecting earth - Within the atmosphere‚ there exists hydrogen‚ water‚ methane and ammonia - These gases are subject to lightening and
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Table below shows the layers of the Earth : Layer Composition Depth Properties Crust Oceanic crust Continental crust Basalt Granite 7-10 km 20-70 km Cool‚ rigid‚ and brittle Cool‚ rigid‚ and brittle Lithosphere Lithosphere includes the crust and the uppermost portion of the mantle Varies; the crust and the mantle have different compositions About 100 km Cool‚ rigid‚ and brittle Mantle Uppermost portion of the mantle included as part of the lithosphere Asthenosphere
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Save Forests and Wildlife As man learnt about nature he started to interfere with the laws of nature. He cut off the forests for agriculture and tamed wild animals for his food and clothing. Man was able to conquer nature‚ yet he can ’t control it. A balance exists between all living and non-living things in nature. Ecological disasters are bound to happen if there is any disturbance in the natural equilibrium. Increased industrialization and human requirements have led to the destruction of our
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direction with height that turn storms severe. • Thunderstorms with rotating updrafts are called super cells commonly producing tornadoes. animation – audio http://www.sandi.net/cms/lib/CA01001235/Centricity/Domain/7724/animations/animations glencoe earth science/thunderstorm_stages_332.swf • Stages of thunderstorms: Cumulus stage(no rain‚ mainly updrafts) ‚ Mature stage(updrafts and downdrafts caused by rain)‚ Dissipation stage (lingering downdrafts). http://my.hrw.com/sh2/sh07_10/student/tabpages/hq7c/c24/s02/vc04/hq7c_c24s02_vc04fs
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HOW DO SUNSPOTS AFFECT US ON EARTH?? Sunspots usually travel in connected pairs. The surface of the sun can reveal small dark areas that vary in numbers and location. Sunspots even tend to cluster in bands above and below the equator. Sunspots are darker than the rest of the sun because they are lower in temperature and release less energy than the areas surrounding them. Sunspots largest number recorded is about 200. Sunspots last for several days. Even though the largest ones can last for so many
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Slogans on Save Environment 1. Get into the Green Scene 2. Cool kids help a warm planet 3. Trees don’t grow on money either 4. Water‚ water everywhere but not a drop to drink 5. Join the race to make the world a better place 6. Save water! Save Life! 7. It’s the only Earth we got 8. When you conserve water‚ you conserve life! 9. A drop of water is worth more than a sack of gold to a thirsty man 10. One tree can make a million matches. One match can destroy a million trees. 11. Save water‚
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World Water Day 3/22/2011 10 Ways to Save Water in the Home: 1. Keep a pitcher of water in the refrigerator instead of running the tap for cold drinks. This way‚ every drop goes down you and not the drain. 2. If you shorten your shower by a minute or two‚ you’ll save up to 150 gallons per month. 3. Designate one glass to use for your drinking water each day or refill a water bottle. This will cut down on the number of glasses to wash. 4. Soak pots and pans instead of letting the water run while
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