change in average global temperature. The main cause of global warming is thought to be the ’greenhouse effect’ that is mainly caused by us humans. With an increase in temperature glaciers worldwide are melting faster than the time taken for new ice layers to form‚ sea water is getting hotter and expanding causing sea levels to rise‚ rivers overflow due to melting glaciers causing floods‚ forest fires are on the rise‚ and innumerable undesired effects are taking place due to global warming.
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Lab 15: Chemical and Physical Properties Introduction Pre-lab Questions 1. Determine if the following scenarios represent a chemical or physical property. a. Dry ice (CO2) sublimes (changes from a solid to gas) at -78 ⁰C at standard atmospheric pressure. Physical b. Iron metal rusts in moist conditions. Chemical c. Hydrogen peroxide decomposes in the presences of light or heat. Chemical d. Silver metal does not react with hydrochloric acid (HCl). Chemical e. Copper is a
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that is common with most matter just before solidification. Once the water temperature has dropped to 0° C‚ the rows of molecules connect at the ends to form an open-ended hexagon. Because of the empty spaces into the middle of these hexagons‚ the ice takes up more space than the same amount of liquid water. The net result is approximately 9% more volume. The disadvantages of this peculiar property are many. For example‚ if a container holding water is made of something rigid‚ like metal or glass
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Wisconsin Glaciation Effects on Minnesota A glacier is a large piece of ice on land‚ normally formed over time. A glacier forms when snow falls and compresses together to form the large mass of ice over time. The glaciers can move because of gravity‚ and the smoothness of the glacier. Glaciers were present in Minnesota thousands of years ago‚ and as they retreated they left behind large amounts of glacier meltwater and various landforms still present today.Glaciers are both constructive and
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people need to understand the characteristics of glaciers‚ climate change‚ and figure out why the two are not mixing‚ which in short‚ is the problem. The gigantic‚ beautiful‚ and majestic landmasses that are formed from thousands of years of snow and ice accumulation are called glaciers. Most of the time‚ glaciers move through valleys and large riverbeds in which the glacier carves through the rock like a knife slicing through hot butter. This comparison is not exactly true because most glaciers move
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(212 degrees.) The way he goes about conducting his experiment is simply stepping out and tossing the two glasses in the air the cold water falls to the ground still wet and on the other hand when the hot water falls to the ground it falls solid as ice thus proving that hot water freezes fastest. In my opinion this experiment isn’t as controlled as it should be there are many uncontrolled variables that are not even mention‚ but he does repeat the experiment two separate times leaving the viewer with
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glacier when the ice melts 3. ________depressions where most outwash plains are pitted C. cirque 4. ________theory that most scientists now accept D. kettles 5. ________large cracks E. horn 6. ________masses of ice that occupy millions of square kilometers F. Milanokovitch Theory 7. ________an almost motionless mass of permanent snow and ice G.ground moraine 8. ________elevation above which ice and snow remain throughout H. crevasses the year 9. ________grainy ice I. continental
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going to do this is by heating up 100ml of water on a Bunsen burner then adding ice cubes. Use a thermometer to measure the temperature every 30 seconds until it reaches a plateau. Hypothesis: As more time passes‚ the temperature of the water increases. Independent variable: Time Dependent variable: Changing water temperature Controlled variable: Fire‚ amount of water and apparatus Apparatus: * Five ice cubes * 250ml beaker * 100ml tap water * Bunsen burner * Tripod
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you need to first pound the dry ice into small pieces. To do so‚ place the dry ice into a plastic packet and tie the packet up firmly. Now pound the packet with the help of a hammer. Once the dry ice has broken down into small pieces‚ scatter a few pieces in the warm water. You will immediately see white smoke rising from the water. This is nothing but condensed carbon dioxide. The quantity of smoke will depend on how hot the water is and also on the quantity of dry ice put in the water. For constant
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1. Physical Properties of Water and Ice 1. Molecular Weight: A. 18.01528 g/mol Water‚ Molar mass Triple Point The temperature and pressure at which solid‚ liquid‚ and gaseous water coexist in equilibrium is called the triple point of water. This point is used to define the units of temperature (the kelvin‚ the SI unit of thermodynamic temperature and‚ indirectly‚ the degree Celsius and even the degree Fahrenheit). As a consequence‚ water’s triple point temperature is a prescribed value rather
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