1 of 22 4.0/ 4.0 Points Who proposed that all of the present continents were once joined together in a single supercontinent called Pangaea? A.Alfred Wegener B.Charles Darwin C.Arthur Holmes D. Harry Hess Answer Key: A Question 2 of 22 4.0/ 4.0 Points The scientific community rejected the theory of plate tectonics because Alfred Wegener could NOT A.identify a mechanism to move the continents. B.disprove competing theories that were not accepted by scientists. C.find
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Figure 1.1: The slope of a line (usually given the symbol m) is the ratio of the change in the y value‚ ∆y to the change in the x value‚ ∆x. We define the slope of a straight line as follows: Slope = ∆y ∆x v.2005.1 - September 4‚ 2009 1 Math 102 Notes Chapter 1 where ∆y means “change in the y value” and ∆x means “change in the x value” between two points. See Figure 1.1 for what this notation represents. Equation of a straight line Using this basic geometric property‚ we can find the equation
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PART A 1. Buying a new PC. Low Yat Plaza in Jalan Bukit Bintang is a well-known place for computer sales. Assume that you want to buy a new PC for your personal use. Your task is to: i. Make a list of your hardware and software requirements‚ be as specific as possible. (For software‚ you must at least choose 1 type of operating system and 3 application programs.) HARDWARE * CPU (Central Processing Unit): responsible for handling all instructions it receives from hardware components
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document to report your findings from the PopEcoLab Exploration Experiment. The lab report consists of three sections: Data‚ Exploration‚ and Lab Summary. • Data: copy any data‚ graphs‚ charts‚ or notes that you have saved in your PopEcoLab online notebook into this section. • Exploration: Answer the questions. The questions in the Exploration section are the same questions in your PopEcoLab instructions. • Lab Summary: Write a 100- to 200-word summary. Data To copy your data from your
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Multiple-Choice Questions Chapter 2: Marine Ecology 1. Which environment has historically been the most stable? w. desert x. coral reef y. tundra z. tropical rain forest 2. Most sea life is found in which area? w. On or above continental shelves x. In trenches y. Along mid-ocean ridges z. Near deep-sea hydrothermal vents 3. Coastal upwelling results in ________. w. carbon dioxide-rich water surfacing x. warm water surfacing y. mixing of salt and freshwater z. lower high tides 4. The yellow-green
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Chemistry (the etymology of the word has been much disputed)[1] is the science of matter and the changes it undergoes. The science of matter is also addressed by physics‚ but while physics takes a more general and fundamental approach‚ chemistry is more specialized‚ being concerned with the composition‚ behavior (or reaction)‚ structure‚ and properties of matter‚ as well as the changes it undergoes during chemical reactions.[2] It is a physical science which studies various substances‚ atoms‚ molecules
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Simple and Fractional Distillation Experiment II Stancy Saji‚ 18 September 2014 Purpose Experiment II involved two kinds of distillation techniques: simple and fractional. Simple distillation was done to separate ethyl acetate—which has a usual boiling point of 77º—from a less volatile component‚ while fractional distillation was done to distinguish an ethyl acetate/n-butyl acetate mixture‚ which has boiling points of 77º and 125 º‚ respectively. Results and Discussion As previously stated the
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Laboratory #16: Analysis of Grease in Water by Solvent Extraction Experiment Date: 2/19/10 Due Date: 2/26/10 II. Objective The goal of this lab was to determine the amount of impurity‚ in the form of oil‚ in water using the method of solvent extraction‚ also known as liquid-liquid extraction‚ a method of separating two materials with different physical and/or chemical properties. Two methods of evaporation will be used to finally determine the concentration of impurity- one using an explosion-proof
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Chapter 2 Terms Matter - anything that takes up space and has mass. Element - substance that cannot be broken down to other substances by chemical reactions. Compound - substance consisting of two or more different elements combined in a fixed ratio. Essential Element - the 20-25% of the 92 natural elements an organism needs to live a health life and reproduce. Trace Elements - required by an organism only minute quantities. Atom - the smallest unit of matter that still retains the properties
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7-2 Notes Eukaryotic Cells 1. Eukaryote cells are divided into two parts Nucleus Cytoplasm Portion outside the nucleus where organelles reside Nucleus 2. Contains most of the cell’s DNA 3. DNA is the code for making proteins 4. Surrounded by a double membrane called the nuclear envelope 5. Contains chromatic‚ which consists of DNA bound to protein Condenses during cell division to form chromosomes 6. Nucleolus – small dense region in nucleus where the assembly of ribosomes begins Ribosomes 7. Small
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