reaction has occurred. (examples = burning sugar or steel wool‚ fat reacting with sodium hydroxide‚ and mixing zinc with hydrogen chloride). Objectives: Students will be introduced to chemical reactions‚ reactants‚ and products and will build upon their knowledge of chemical versus physical changes. Essential Questions: How is a chemical change related to a chemical reaction? Estimated Time: 50 minutes Materials: Steel wool‚ lighter‚ Triple-Bean Balance‚ Google Chromebooks‚ Science Interactive
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beaker)‚ tap water (to wet the cotton)‚ pen‚ paper‚ ruler and a rubber (this is for your graph and data) Method: first get two beakers then wrap one in cotton wool and wet it with a tap water temperature representing the water an elephant would spray on its self to cool down ‚ then wrap one in cotton wool and then leave it dry‚ the cotton wool emulates (emulate just means to copy) the elephants skin. Then put water in both of the beakers make sure the water is put inside the beakers at the same time
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knights‚ clerks‚ carpenters and drapers. Across the road is the market‚ and in King John’s day‚ the price of wool in Nottingham set the price of wool for the whole of England‚ such was its importance. Merchants travelled from far and wide to trade there despite the danger from Gisborne’s 1‚500 men‚ and Sir Walter Tailboys‚ who in partnership with his brother-in-law Sir Geoffrey Luttrell ambushed wool merchants travelling to the coast. The sheriff’s men were everywhere and William de Trent‚ who featured
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It was made in 1934. Winn was from Celina‚ Tx‚ he was born in 1905 and died in 1979. In this painting three men are shearing two sheep and refining the wool. The man on the bottom of the painting is sheering a sheep‚ the one in the top left corner is refining the wool‚ and the last man is holding another ram steady waiting for it to be sheared. Each man is muscular‚ has a yellow undertone‚ and is wearing a different color hat. Behind the men is a building‚
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occupation. We get this idea from then when they went through different stages to become involved in a guild. This arose the idea of the ‘putting out system.’ For example‚ someone would raise sheep‚ they would bring the sheep to someone to take off all the wool. After‚ they
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The Effects of a Seed Coat in Seed Germination Mario Monroe INT1 Task 3 The Effects of a Seed Coat in Seed Germination Abstract Seed germination is an important aspect in plants growth and food production. It is therefore it’s of uttermost importance to know the effective ways of seed germination so as to improve food production. This research was therefore prompted by the rising issue of farmers buying low quality and a damaged maize seed from unscrupulous sellers and this has led to deterioration
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of chlorophyll due to the plants genotype or phenotype to the environment? Materials Used: • 400 mustard seeds • Cotton wool • 2 plates Methods Used: • Took 400 mustard seeds • Distribute it equally into two piles (200 seeds per pile) • Put one set of seeds in cotton wool (200) and the other set of 200 seeds in another piece of cotton wool. • Take the two cotton wools and place each one on a separate plate. • Put one plate in the sunlight • Put another plate in a dark cupboard. • Water
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Patricia Al-Masri 201004181 Figure 1 Christian Dior fixing the dress he designed on a model. Figure 1 Christian Dior fixing the dress he designed on a model. On February 2‚ 1947‚ Christian Dior launched his first fashion collection for Spring/Summer 1947‚ “Carolle”‚ thus putting an end to the wartime styles that had dominated the fashion world ever since 1939. The new collection went down in the fashion history and got to be known by the name of the “New Look”. During World War II
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Back Titrations Question 1 A 10.0 g piece of rusty steel wool is dissolved in 200.00 ml of 1.00 M sulfuric acid. The excess sulfuric acid is determined by titration with a 0.500 M sodium hydroxide solution. 300.00 mL of sodium hydroxide is required to neutralise the acid. What was the % purity of iron in steel wool? Question 2 A 3.145 g sample of a certain lead ore containing lead(II) carbonate‚ PbCO3‚ was heated gently with 25.00 mL of nitric acid of concentration
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clamp‚ paraffin oil‚ wool‚ stand‚ trough‚ water Hypothesis: We will collect the alkanes and alkenes in a test tube and when we put bromine water in‚ the water will turn from yellow to transparent in the presence of an alkene. Method: 1. Place some wool in the back of the boiler tube. Using a pipette‚ place a few drops of paraffin oil onto the wool. 2. Put in the boiler tube a handful of lava rocks‚ in the center of the tube and not touching the wool. 3. Place the stopper
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