Background: As members of the class Amphibia‚ frogs may live some of their adult lives on land‚ but they must return to water to reproduce. Eggs are laid and fertilized in water. On the outside of the frog’s head are two external nares‚ or nostrils; two tympani‚ or eardrums; and two eyes‚ each of which has three lids. The third lid‚ called the nictitating membrane‚ is transparent. Inside the mouth are two internal nares‚ or openings into the nostrils; two vomerine teeth in the middle of the roof
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Recreational vehicles by definition are designed for fun. However‚ that doesn’t mean they don’t need to be insured. You need coverage for your recreational vehicle. Otherwise‚ if something happens to it‚ your investment is lost. Since recreational vehicles aren’t cheap‚ it’s important that you protect yours. Read below to learn more about recreational vehicle insurance: Types of Recreational Vehicles Typically Covered: Of course‚ each insurance company differs slightly on what types of recreational
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reaction‚ what the products were‚ and if the reaction was completed or not. Materials and Methods - • .1 M NaCl • .1 M AgNO3 • .1 M Na3PO4 • .1 M NaOH • .1 CuSO4 • Five droppers • Spot Plate • Pen/Pencil • Paper • Goggles • Apron Safety Precautions – • Wear goggles and apron at all time while inside the lab. • You may use rubber gloves o protect your hands from the chemicals that will be used in the lab. • If any chemical gets on your skin tell the teacher right
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Observation tables were to be copied into lab books in order to record data. 2. Equipment was assembled as shown in diagram. (See figure 1.1 on page 2) 3. Welder’s goggles were used to protect the eyes when the magnesium was burning. 4. An 8cm long strip of magnesium was stripped of possible oxidation with a piece of sandpaper or steel wool. A piece of dry paper towel was used to remove any possible residue. 5. Based
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General ColleGe Chemistry LabPaq / Published by: Hands-On Labs‚ Inc. sales@HOLscience.com / www.HOLscience.com / Toll Free 866.206.0773 a laboratory manual of small-scale experiments for the independent study of General College Chemistry 50-0125-CK-01 LabPaq® is a registered trademark of Hands-On Labs‚ Inc. (HOL). The LabPaq referenced in this manual is produced by Hands-On Labs‚ Inc. which holds and reserves all copyrights on experiences. The laboratory manual included with a LabPaq
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empirical formula for hydrated copper sulfate. In doing this lab‚ one was able to see the gradual change in the composition of a hydrate into an anhydrous salt. The lab was carried out with numerous steps. First‚ one had to safely prepare by putting on goggles. One then had to wash and heat the dish with the flame for about three minutes. After allowing the dish to cool‚ one had to weigh the evaporating dish and record the weight. Two to three grams of copper sulfate hydrate was then added to the dish and
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Open source products and services. As the company states:” Google’s mission is to organize the world’s information and make it universally accessible and useful.” The same is with almost any of Google products. Let it be Google maps‚ calendars‚ drive‚ OS or the advices how to rank better in a search index. Google’s products can also be used with any OS or mobile device without a charge. Google openness is the key why Google is the number one in many products and services. 1. Quality and customer
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ten minutes. Materials: 1x1x1 cm agar cube 2x2x2 cm agar cube 3x3x3 cm agar cube 100 ml of sodium hydroxide Goggles Petri dish Scissors Timing device Tweezers Beaker Graduated cylinder Procedure: Refer to ’Nelson Science Perspectives 10’ pages 38-39‚ section 2.4; ’What Limits Cell Size?’. Safety: All long hair was tied back‚ and loose clothing was removed. Goggles were worn at all times‚ and the sodium hydroxide was handled carefully to prevent contact with skin‚ and was not ingested
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graph of the results. A hypothesis for this lab could be if ammonium nitrate is added to water then the water temperature will decrease. . Hypothesis: If ammonium nitrate is added to water then the water temperature will decrease Materials Goggles Gloves 250 ml beaker 150 ml beaker Chemical scoop Petri dish Petri Dish Accurate Scale 12 grams of Ammonium Nitrate Preciously 200 ml of water Beaker Brush (If beaker is not clean) TI CBL system and Thermometer Electric Stirrer or Stirring
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above the burning food. 7. Once the food has extinguished take the temperature of the water in the can. 8. Weigh the food that has been burned. 9. Pour out water that is in the can. 10. Repeat steps 2-9 for each food item. Safety: Wearing goggles. Wearing aprons. No eating of the lab materials. Securing long hair in a ponytail. Materials: Marshmallows. Tortilla chips. Potato chips. Barbeque lighter. Thermometer. Stirring rod. Ring stand. Data: Food Weight Before Burning
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