Here is a video about how magnets we buy in a store are made!
Have a look!
https://www.youtube.com/watch?v=noGGcyPHtdI
Hi everybody,
Here is a video about how magnets we buy in a store are made! Have a look! https://www.youtube.com/watch?v=noGGcyPHtdI
1 Comment
1. CAVES are formed in many different ways, but most caves are formed by chemical weathering that dissolves the limestone and minerals. Caves can get bigger, wider, taller and deeper as the weathering and erosion continues to take place. Even really neat mineral and rock formations can occur within the cave!
2. There are two types of arches- weather eroded arches are made of sandstone and are affected by the rainwater and wind as they erode the sandstone. Surface cracks crumble and flake until the rock eventually cuts through creating holes that get bigger with rock falls and further weathering. Water eroded ARCHES are formed when a stream wears away and penetrates the rock. 3. Cliffs are formed as weathering works on the upper parts of the cliff and erosion wears away the base of the cliff. Steep cliffs are formed from hard rocks that are resistant to weathering. The hard rocks erode and weather slowly. Softer rocks and fractured rocks form more gently sloping cliffs because they erode more easily. An escarpment (or scarp) is a type of cliff formed by the movement of a geologic fault, or a landslide. 4. There are a number of natural processes that can form lakes. When Earth’s plates lift and make a mountain range, it can create a bowl-shaped depression that accumulates water and forms lakes. Also, glaciers can scrape depressions in the surface where water accumulates. 5. A delta is a land form where the mouth of a river flows into an ocean, sea, estuary, lake or another river. Sediment carried outwards into the flat area of water which the river's flow encounters and is set down as the currents slow. A MESA is a flat-topped mountain bordered on all sides by steep cliffs. There are many different types of rock. Some erode quickly and some slowly. This is what gives mesas their distinctive shape. Softer rocks are eroded away on the surface into valleys, where they collect water drainage from the surrounding area, while the stronger rock layers are left standing out. A large area of strong rock may shield the layers below it from erosion while the softer rock surrounding it is eroded into valleys, thus forming a cap rock.” A MESA can be formed quickly or slowly.
Mesas get smaller as their cliffs erode and become small, flat-topped hills called BUTTES. Buttes are formed by erosion when hard rock covers a layer of softer rock that is easily worn away. The hard rock avoids erosion while the soft rock around it wears down. A CANYON is a deep valley between cliffs often carved from the landscape by a river. This erosion takes a very long time. The canyon is formed by the water flowing through the river valley eroding the earth beneath it and carrying away loose rock and soil. The rock and soil being carried away weathers the ground beneath it by one object rubbing against another. Canyon walls are often formed of strong sandstones or granite. The Colorado River and the Snake River run through canyons. Over time, a canyon valley can get deeper and deeper. VALLEYS are formed by a rivers or glaciers. A valley formed by flowing water is V-shaped. If the water is moving fast, there will be a narrow valley at the bottom. Slower moving waters create wider valleys. Valleys created by glaciers are U-shaped and they are created when the glacier warms up and disappears. Hi everyone,
Here is a video I found on Erosion. However, when he says "erosion", it seems to mean a combination of the weathering process AND the erosion process, since weathering and erosion mostly happen at the same time. For example, when wind is blowing at a rock, it is breaking it down and carrying it away AT THE SAME TIME. Don't get confused! Here is the link: https://www.youtube.com/watch?v=D7WFeh30UpY Hi,
Please watch this video about static electricity. https://www.youtube.com/watch?v=SnabbDPmlUs Just copy and paste it in your browser. Hope you will like it. Ms Zhong Hi Everyone,
Here is a video I found about definitions and differences between physical and chemical changes. http://studyjams.scholastic.com/studyjams/jams/science/matter/changes-of-matter.htm Hope you will all enjoy it. Zhong Hi Everyone,
For those who can't find my Quizlet page, here is the link: http://quizlet.com/class/1123706/ Hey everyone,
Here is a great website where students can type Chinese or use its online Chinese-English or English-Chinese dictionaries. www.mdbg.net It'd be really helpful if they can practice typing Chinese. Please make use of this. Thanks! Ms Zhong/ Mrs Griffin Hi guys,
Here is the link to a short video about electromagnet. http://www.neok12.com/video/Magnetism/zX57555a4f5f0b606e625063.htm Enjoy! Ms Zhong Hi everyone,
Here is the link to a short video explaining the magnetic field and the magnetic field lines. http://www.neok12.com/video/Magnetism/zX4752067171765e67545d45.htm Enjoy! Ms Zhong |
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