...Exercises 4, 20, 27, 30, and 43 on pages 155-156 Problems 3, 9, and 12 on page 157 1. The density of a rock doesn’t change when it is submerged in water? Does your density change when you are submerged in the water? A. A human body can be compressed, therefore, volume decreases while mass remains constant. Alternatively, a body will need oxygen in the lungs to survive, so as the water pressure increase with depth, the air pressure in our lungs must be increased to match. This means the mass of the gasses will be increased. 2. The relative densities of water, ice and alcohol are 1.0, 0.9, and 0.8, respectively. Does the ice cubes float higher or lower in a mixed alcoholic drinks? What can you say about a cocktail in which the ice cubes lie submerged at the bottom of the glass? A. The ice cubes will sink if there is enough alcohol in the beverage. In 80+ proof (40+%), ice cubes should sink. Ice cubes float in water, and sink in alcohol. Anything with less density than the liquid it's in will float. 3. How does the density of air in a deep mine compare with the air density at Earth’s surface? A. As altitude decreases, pressure increases. The mine air WILL be denser than surface air. 4. Why do you suppose that airplane windows are smaller than bus windows? A. Because there is a lot more pressure at a higher altitude and a smaller window is stronger. 5. When steadily flowing gas from a larger-diameter pipe to smaller-diameter pipe, what happens to its...
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...First off, to understand how glaciers have an impact on the hydrosphere you need to know what a glacier is. Glaciers, (also known as Icebergs when they break off of the main glacier and float on water) are a body of dense ice that is constantly moving under its own weight; it forms where the accumulation of snow exceeds, it grows over many years, often centuries. Although some of these parts of glaciers may float on salt water or the ocean they are made up of fresh water. Now, to truly understand glaciers lets go back to the beginning of a glacier. Moist warm air rises up from the ocean and then cools, condenses and falls down onto the ground as rain or snow. You need lots of snow to create a glacier, more than a mountain...
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...1. Dry Ice Bubble This fun, simple demonstration of how to create a giant soap bubble with dry ice will have your students' eyes popping. 2. Glow Sticks-Liquid Light Kids love glow sticks. Ask them how they work and the likely answer will be "batteries." The answer is simple science. This cool experiment on the luminescent science behind glow sticks is one of many fantastic and informative videos on YouTube hosted by Steve Spangler. 3. Inertia Experiment This basic experiment using a pen cap, a bottle, and a crochet hoop demonstrates one of Sir Isaac Newton's most fundamental principles-"an object at rest stays at rest." 4. How to Make a Rain Cloud in a Bottle Teach kids the curious process of condensation with a bicycle pump, a soda bottle, and a few other simple items. This is a great way to teach the science behind everyday weather. 5. Afraid of Pop Rocks? Discovery Channel's venerable Mythbusters team uses science to debunk the popular urban legend that the combination of Pop Rocks and soda could cause your stomach to explode. Use this video to talk with your class about how to pose scientific questions. 6. How Do You Keep an Egg from Breaking? How Stuff Works creator Marshall Brain offers a kid-friendly look at the science behind a shattering egg. How can you drop an egg from a height of two feet and not have it break? Watch this video with your students and invite them to figure it out! 7. What Is Surface Tension? Surface tension is what allows a paper...
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...Color Changes Intro to Physical Science Professor Fara Dyke 1. What three particles make up every atom? Protons, neutrons, and electrons are the three main subatomic particles found in an atom. Protons have a positive (+) charge. An easy way to remember this is to remember that both proton and positive start with the letter "P." Neutrons have no electrical charge. 2. What are the major differences among the three particles that make up every atom? The three particles which make up every atom differ in electrical charge and in mass, primarily. The proton and neutron have approximately the same mass but the neutron is slightly heavier; they each weigh approximately 2000 times more than the electron. The proton has a charge of +1, the neutron has no charge, and the electron has a charge of -1. 3. What is the relationship between a photon and a quantum leap? A quantum is a discrete bundle of energy. It can be delivered by a photon. A quantum leap in an atom is when a photon carrying just the right amount of energy (i.e., at the right frequency or the right color) is absorbed by the atom and its electron jumps to a higher quantum level or higher orbital. 4. using the periodic table, determine the result of the following calculation: the number of electrons in the outer shell of a hydrogen atom minus the number of electrons in the outer shell of a helium atom plus the number of electrons in the outer shell of a hydrogen atom. This would equal (0). 5 .When is an electron...
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...My Idea Problem & Hypothesis Problem Statement and Hypothesis 03/25/201245 Comments Picture Now that you know your independent and dependent variable, the rest of the science fair project is a piece of cake. Your problem statement and hypothesis are extremely easy to write if you have determined your independent and dependent variables. Lets begin with the problem statement. This statement is ALWAYS written as a question. The question should always start with either which or how. The one you choose will depend on your independent and dependent variable. The form should be Which or How will the independent variable affect the dependent variable. Picture Look at the examples to the left. These questions are problem statements based on the independent and dependent variables which were previously decided. How will .... or Which amount .... are excellent ways of starting your problem statement. As you can see, both of these problem statements fit the format described above. How or which independent will affect the dependent. Okay, now it is time for you to write your problem statement for your science fair project. 1. What is your problem statement? Picture Our next step is to write a hypothesis. The hypothesis is very much like the problem statement except it is the answer to your question. The hypothesis should always start with I THINK ...., the you will choose one of the three independent variables you think will have the least or most affect...
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...theory has a much broader scope than a hypothesis. An element is a substance than cannot be broken down into other substances by chemical reaction Chapter 2: Chemistry for Biology • What is the difference between and element and a compound? An element is a substance than cannot be broken down into other substances by chemical reaction. Compounds are substances that contain two or more elements in a fixed ratio. 2. Draw a picture of an atom. Label the nucleus, protons, neutrons and electrons 3. What is a covalent bond? A covalent bond forms when two atoms share one or more pairs of outer-shell electrons. 4. Why does ice float? In liquid water, hydrogen bonds all the time, coming apart and coming back together again. Ice floats because as water is cooled down, stable hydrogen bond hold the molecules apart, therefore making ice less dense than liquid water. Chapter 3: The molecules of life Complete a 4-3-2-1 on this chapter. List 4 important things you learned in this chapter One pretty interesting fact I learned from this...
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...(A) Molecules of water in liquid state (B) Atoms of helium in gaseous state at high temperature (C) Molecules of solid iodine (D) Molecules of hydrogen chloride gas 2. Acetone and chloroform are soluble in each other due to (A) Intermolecular hydrogen bonding (B) Ion-dipole interaction (C) Iinstantaneous dipole (D) All of the above 3. NH3 shows a maximum boiling point among the hydrides of VA group elements due to (A) Very small size of nitrogen (B) Lone pair of electrons present on nitrogen (C) Enhanced electronegative character of nitrogen (D) Pyramidal structure of NH3 4. When water freezes 0oC, its density decreases due to (A) Cubic structure of ice (B) Empty space present in the structure of ice (C) Change of bond lengths (D) Change of bond angles 5. In order to mention the boiling point of water at 110oC, the external pressure should be (A) Between 760 torr and 1200 torr (B) Between 200 torr and 760 torr (C) 765 torr (D) Any value of pressure 6. The boiling point of the halogens: (A) Increases down the group (B) Decreases down the group (C) Remains constant (D) Cannot be predicted 7. At Murree Hills water boils at: (A) 98oC (B) 100oC (C) 0oC (D) 50oC 8. Vapour pressure of a liquid depends upon: (A) Amount of liquid (B) Surface area (C) Temperature (D) Size of container 9. Forces which are present between ions and water...
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...overseas markets, the chain serves Pepsi products. The Jollibee brand successfully incorporated into its line-up the Sweet & Sour Meatballs, Grilled Pork Tenders, Jollibee floats and Flavored Crispy Fries in 2011. It also introduces the Crunchy Chicken Burger and Chicken Nugget Crunchers to its chicken offerings. The charming thing for me is the brand also added the Corned Beef Pandesal, Chicken Sausages and Pancake Combos, and Hash Brown Burger to its breakfast line, and the Choco Crumble Sundae and Strawberry Sundae for dessert lovers. Thus, we can see that Jollibee is always progress until now. Core target group analysis in the selected market Jollibee principal business is the development operation and franchising of quick-service restaurants under the trade name “Jollibee.” However, Jollibee knows the food quality, service, price-value relationship, store location and ambience, and efficient operations continue to be critical elements of the Company’s success in the quick-service restaurant industry. The company president is Tony Tan Caktiong (better known as TTC). He started Jollibee in 1975 as an ice cream parlor owned and run by the Chinese-Filipino Tan family, he made Jollibee had diversified into sandwiches and realized that events triggered by the 1977 oil crisis would double the price of ice cream. The Tans’ hamburger, made to a home-style Philippine recipe developed by Tony’s chef father, quickly became a customer favorite. A year later, TTC had opened five...
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...(undiluted extract and room temperature H2O2) was used within the experiment with only one other variable changed in the other assays. These variables included a boiled, frozen and then thawed, and frozen potato extract and dH2O instead of the potato extract. It was noted that the temperature and or way the potato extract was prepared effects how the enzyme with the potato will react. Therefore the results of each assay varied, suggesting there is more than one way that a catalyzed reaction can occur. Introduction: (Burmania) The main purpose for this experiment was to explore how an enzyme catalase caused a reaction to catalyze through doing various assays using potato extracts. Enzymes are catalysts that are crucial in helping to speed up reactions, and catalase is a common enzyme found in almost every living organism that is exposed to oxygen. For this experiment, potatoes were used because they were previously known to have significant catalase activity. The potato catalase was mixed with hydrogen peroxide because the catalase helps to breakdown the hydrogen peroxide which helps determine how long a paper disk takes to float to the surface, which in return provides the time of the complete reaction. Since various assays were mostly used in combination with the potato extract, the extract should aid in speeding up the reactions with the assays that it is used. With the following information, the various ways that the assays were prepared within the realm of temperature...
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...a molecule have opposite charges - H+, O- Polarity and Hydrogen bonds -H+ attracts to O- and forms a hydrogen bond between water molecules -polarity and H-bonding are the reason why water has all of its special characteristics that support life! Cohesion -same type of molecules sticking together (water to water) -ex: water molecules forming a lake Adhesion -two different molecules sticking together (water to something else) -ex: water sticking to grass -water is both cohesive and adhesive Capillary action -water creeping up thin "tubes" -ex: plants getting H2O to the leaves from the roots Less dense as solid -ice is less dense than liquid water (b/c molecules are spaced farther apart in ice than water) - important for aquatic habitats: -ice floats in top so aquatic life...
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...Explain how the properties of water are important to plants/animals. All living things contain water. Water is the main constitute of all organisms. Mammals consist of around 65% water. Water is the solvent, the medium and the participant in most of the chemical reactions occurring in our environment. The properties of water are extremely important to plants and animals for many reasons. Firstly, water is transparent which allows light to filter into aquatic environments, and therefore aquatic plants can absorb light and perform photosynthesis. Since all plants originated in the ocean, the transparency of water has had a major influence on life as we know it. Secondly, water is also cohesive, meaning it binds to itself, due to the polarity of the water molecule. The positive, hydrogen side of the molecule binds to the negative, oxygen side of another water molecule. This bond is called a hydrogen bond. Water is also adhesive, meaning it binds to other things around it. This property allows for transport of water against gravity in plants. The water clings to the xylem tube of plants and is able to be drawn up in long columns up the stem due to its strong cohesive force. ...
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...STALL # 17 MARKET DAY IMPLEMENTATION: MARKETING PLAN SUMMARY AMB240 Marketing Planning and Management Tutorial 5: Dominic Kauter Wednesday 2pm Composed by Shelley Lee | n8606081 | Keegan Sutherland | n8827419 | Taylor Willmott | n8620199 | Gina Theron | n8002266 | Ellyse Sainty | n8879800 | PRODUCT Berried offers Byron Bay Chocolate Factory’s gourmet chocolate coated fruit and nut and fresh, high quality strawberries packaged in a small take-away Chinese container. The product has altered slightly in that Berried does not offer the strawberries pre-dipped. This is a conscious decision made by the marketing team to make the product a tangible item and an attractive gift option for Mother’s Day on the following day (May 11th). The product maintains its luxury branding throughout its product, price, promotion and distribution strategies. MISSION STATEMENT “At Berried, we are committed to supplying our customers with both gourmet chocolate and fresh, high quality strawberries in a unique manner” MARKETING TEAM Shelley Lee (Marketing Manager) Keegan Sutherland (Product Manager) Taylor Willmott (Pricing Manager) Gina Theron (Distribution Manager) Ellyse Sainty (Promotion Manager) KEY COMPETITORS 1. Silver Spoon (Stall no. 49) Located on the other side of the market space, potentially attracting customers that do not see Berried’s stall first. Fudge brownies often contain chocolate, being one of Berried’s major ingredient, therefore...
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...1. How many elements are essential? a. Approximately 20-25% of the 92 natural elements are considered essential, this is about 17-25 elements. 2. Which elements make up 96% of matter on earth? a. The four elements that make up 96% of all matter are the elements oxygen (O), hydrogen (H), nitrogen (N), and carbon (C). 3. What subatomic particles are found in the atomic nucleus? What are their charges? a. There are three subatomic particles found in an atom’s nucleus and they are electrons, protons, and neutrons. Both electrons and protons are electrically charged, electrons are negatively charged and protons are positively charged. The neutron has no electrical charge at all, lending to its name. 4. Explain matter’s state of potential energy....
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...Chang: Chemistry 7th Edition - Chapter 11 CH116 General Chemistry II INTERMOLECULAR FORCES Inter-molecular Forces Have studied INTRAmolecular forces—the forces holding atoms together to form molecules. Now turn to forces between molecules — INTERmolecular forces. Forces between molecules, between ions, or between molecules and ions. Table 13.1 Summary of Intermolecular Forces Ions Dipoles Induced Dipoles (Overhead & book p 585) Covalent bond energies 100-400 kJ/mol Attractive forces between ions 700-100 kJ/mol Intermolecular attractions less than 15% of bond energies Intermolecular Forces Ion-Ion Forces Na+ — Cl- in salt. These are the strongest forces. Lead to solids with high melting temperatures. NaCl, mp = 800 oC MgO, mp = 2800 oC Intermolecular Attractions Coulomb’s Law Force ~ (n+)(n-)/d2 Distance - twice the distance = 1/4 the force Charge on the Ion Magnitude of the dipole Composition - Solids and Liquids are closer so composition has greater role in attractive forces Attraction Between Ions and Permanent Dipoles Water is highly polar and can interact with positive ions to give hydrated ions in water. Attraction Between Ions and Permanent Dipoles Water is highly polar and can interact with positive ions to give hydrated ions in water. Dissolving Ionic Solids Attraction Between Ions and Permanent Dipoles Many metal ions are hydrated. It is the reason metal salts dissolve in water. Attraction Between Ions and Permanent...
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...A Review of “Unsinkable” The Full Story of the RMS Titanic In his book “Unsinkable” The Full Story of the RMS Titanic, Daniel A. Butler’s goal was to write an unbiased account of the events of sinking of the Titanic. His story takes the reader through all aspects, from thought to planning, from building to launching, from the iceberg and the sinking of the Titanic to the rescue of the survivors, and to the discovery of the wreckage at the bottom of the Atlantic Ocean. Butler does not place blame, he presents only the facts. The conception of the RMS Titanic occurred in the summer of 1907. The men behind the creation of the Titanic were Joseph Bruce Ismay, the managing director of the White Star Line, and Lord William James Pirrie, senior partner and chairman of the board of Harland and Wolff, a Belfast shipyard. Ismay and Pirrie’s respective businesses had been in partnerships for the last forty years; this relationship would continue for another quarter of a century, continuing after the tragic events surrounding the sinking of the Titanic. Ismay decided that not only one, but three ships were needed. As the men continued their meeting, the sketches became more defined and soon they had outlined the three ships, the Olympic, Titanic, and Gigantic. The three ships were staggered in their construction; they were projected to be ready for service in the spring of 1911, 1912, and 1913 respectively. The dimensions of these “strikingly beautiful” ships were 882.5 feet...
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