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Kinetics
In this kinetics worksheet, students review activation energy, rate of reaction, and reaction mechanisms. This worksheet has 13 multiple choice questions.
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Physical and Chemical Changes
Students examine the different changes in matter. In this chemical change instructional activity students determine the amount of reactant made in a reaction using the law of conservation.
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PhysioEx: Chemical and Physical Processes of Digestion
In this anatomy worksheet, students complete 22 review questions in the format of short answer, table completion, and fill in the blank after finishing an online virtual experiment about the chemical and physical processes of digestion.
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Activity #6 How Fast Do Reactions Go?
Students name the factors (concentration, temperature, and a catalyst) which can affect the rate of a chemical reaction. They use their knowledge of particle theory to explain their observations. Pupils comprehend that the...
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Activity #19 Oxygen For Yeast
Pupils observe and record what occurs when yeast is added to hydrogen peroxide. They indicate why a chemical reaction (decompostion) must have occurred during the experiement. Pupils explain why yeast was used. Students comprehend the...
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Kinetics and Temperature
In this kinetics worksheet, students calculate the value of the activation energy for reactions at given rate constants. This worksheet has 5 problems to solve.
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Reaction Rates
Students work in groups of 4-6 for the experiment/activity part of this exercise. They base their explanation on what they observed. Students observe how substances react chemically in characteristic ways with other substances to form...
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The Speed of Chemistry
In this rates of chemical reactions worksheet, high schoolers read about the various factors that influence the rate of chemical reactions such as surface area, concentration, temperature and catalysts. Students answer eight questions...
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Chemical Energy
In this science worksheet, students read about enzymes and nutrition. Students also answer 2 comprehension questions about the reading.
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1999 U.S. National Chemistry Olympiad Part II
A variety of topics including reaction rates, combustion reactions, periodic trends, and ionization reactions are included in this exam. Test takers also practice calculating empirical and molecular formulas of compounds.
Teach Engineering
Skin and the Effects of Ultraviolet Radiation
Though UV radiation can damage skin, it isn't all bad. The third installment in a six-part series allows the class to study the structure and function of skin. They learn about the different types of skin cancer and the SPF rating...
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Le Chatelier's Principle
In this chemical equilibrium worksheet, young scholars review Le Chatelier's Principle and predict the direction of equilibrium shift for different changes to a chemical reactions. Students also review enthalpy and entropy. This...
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Reaction Rates-Catalysis, Concentration, Surface Area, and Temperature
Students determine the meanings of concentration, surface area, and catalysis through an experiment. In this lesson about chemical reactions, students participate in an experiment. Students complete three different parts of the...
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Temperature and Keq
The presentation offers a set of three problems related to temperature and equilibrium reactions. It walks through solving each, reminding pupils how to figure for the forward and reverse rates.
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Bhopal - Rate of Reaction
Students determine that the rate of reaction is affected by temperature, surface area, concentration of reagent, and addition of a catalyst or inhibitor. They observe that on December 3rd, 1984, 8000 people died when the chemical plant...
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Chapter 17 Worksheet- Equilibrium
For this equilibrium worksheet, students answer eleven questions about chemical reactions, equilibrium concentrations and endothermic and exothermic reactions. They write equilibrium expressions for chemical reactions and they explain...
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Exothermic vs. Endothermic
The PowerPoint opens with video footage of the decomposition of nitrogen triiodide and then explains it with diagrams. Graphs of exothermic and endothermic reactions are exhibited, as well as one for the effect of a catalyst on reaction...
Science Geek
Equilibrium and Le Chatelier's Principle
Time to shake up the status quo with a presentation that describes Le Chatlier's Principle and has pupils examine situations in which equilibrium is upset. Four examples show different stresses to the reaction and the resulting shift.
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2004 U.S. National Chemistry Olympiad Exam Part II
In this National Chemistry Olympiad test, junior chemists answer eight problem solving questions on a variety of topics. These include calculating molarity of solutions, determining rates of reactions, calculating decay and discussing...
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Oxidation: Does Iron Burn?
Searching for a fairly easy demonstration of how oxidation triggers rust formation? The demonstration allows high school chemists to witness the rusting of metals, as large and small objects are held into a flame while triggering the...
Virginia Department of Education
Mystery Iron Ions
Young chemists perform an experiment to determine if a compound is iron (II) chloride or iron (III) chloride. Then they determine the formula, balance the equation, and answer analysis questions.
Science 4 Inquiry
Enzymes in Action
Enzymes play a role in almost every function in the human body. Scholars explore three variables related to the use of enzymes. They observe a catalase reaction, experiment with substrates, and examine reactions rates.
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Enzymes
With the help of this pair of slides, biology learners will be able to define enzymes and explain the optimal conditions for functioning. The first slide, with simple graphics, shows how enzymes function as catalysts for chemical...