Physical and Chemical Change Objective: Recognize and distinguish between chemical and physical changes. Materials: - lab balance - microspatula - lab burner - dropper pipet - 5 test tubes - mortar and pestle - test tube rack - magnet - test tube holder - insulating pad - watch glass - safety goggles - glass square - lab apron or coat - copper sulfate pentahydrate - iron fillings - sodium chloride - magnesium ribbon - hydrochloric acid - paper
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1. a) Define a cell. b) What is a unicellular organism? c) Can a cell be multicellular? A) the structural‚ functional‚ and biological unit of all organisms. B) a organism that only consisits on one cell C) A single cell cannot be multicellular. 2. a) What is a difference between prokaryotic and eukaryotic cells? b) What is one significant similarity? A) eukaryotic cells have a neuclus‚ prokaryotic cells do not. B) Both have DNA 3. Which type of microscopy provides a 3d view of the surface of
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Discussion The purpose of the Density Lab was to determine the identity of four unknown solids and two unknown liquids by calculating their densities and comparing them to a density chart‚ taking into account error analysis and finally classifying the substances. In order to calculate this density‚ we first found the mass of the container that was to be holding the substances. We then found the volume of the substance‚ and lastly determined the mass of the container and substance. We subtracted
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Condensation is the process of conversion of a gas into liquid and vaporization is the process of converting liquids into gas or vapors. The process of evaporation and condensation occurs in nature for water all the time resulting in earth’s water cycle. The water from earth’s water bodies gets evaporated to form clouds‚ and these clouds then condense into rain. Rain Water is distilled water since during the
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more than the blue‚ so the solution appears blue. The tetraamminecopper(II) cation is the principal copper species present in ammonia solution of concentration 0.01 to 5M. However‚ at lower concentrations of ammonia‚ other copper species having 3‚ 2 or 1 molecules of ammonia may be present. At higher concentrations of ammonia‚ a
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1. What are the different restriction points of the cell cycle? Describe each. G1 (Restriction) Checkpoint * End of G1‚ just before onset of the S phase (DNA replication) * Yeast “start”; other eukaryotes “restriction point” * The options for the cell at this point: * divide‚ delay division‚ or exit the cell cycle * Cells can exit the cell cycle at this point into an arrested stage (G0) * When this checkpoint is passed‚ cdk4 and cyclin D
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BIO 120 General Biology I Note-taking/Study Guide Chemistry What is chemistry? Define energy Define potential energy and give an example Define kinetic energy and give an example Define matter Describe the three states of matter? Define elements Define atoms What are the three subatomic particles? What are their charges? Where are they found in the atoms? Define atomic number. Use the periodic table to determine the atomic number of various elements. Define mass number. Use the periodic table
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Assessment Worksheet Performing a Vulnerability Assessment CSS150-1502A-02 : Introduction to Computer Security Course Name and Number: _____________________________________________________ Johnathan McMullen Student Name: ________________________________________________________________ Stephen Osborne Instructor Name: ______________________________________________________________ Lab Due Date: ________________________________________________________________ Overview In this lab‚ you used Nmap commands
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8.1.1 The Eukaryotic cell cycle 1. If a cell is in a state in which it no longer divides then the cell is probably arrested at which stage of the cell cycle? A) G1 2. Interphase of the cell cycle lasts longer than mitosis? A) TRUE - A cell spends about 90% of its life in interphase of the cell cycle‚ while it spends only about 10% of its life in M phase. 3. When does DNA replication occur in the cell cycle? A) Interphase 4. Which statement about the cell cycle is incorrect? C) In G2
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Cell Growth and Reproduction Study Guide The Cell Cycle Study Guide Vocabulary – Cell Cycle‚ Mitosis‚ Cytokinesis 1. How did the G1 and G2 stages get their names? 2. Cells must pass through a critical checkpoint during which two stages of the cell cycle? 3. Where does DNA synthesis happen in eukaryotic cells? 4. What two processes make up the M stage? 5. Among different types of cells‚ which stage of the cell cycle varies most in length? 6. Why does a skin cell divide
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