SUMMATIVE TEST 4 (QUARTER 3) PHYSICAL SCIENCE GRADE 12 DIRECTIONS: Read and analyze the questions. Shade only the circle with the letter of the correct answer on the given answer sheet. Erasures and/or multiple marks are considered wrong. Name Score I. Complete the sentence to form relevant ideas. Choose the words from the box below. Level and Section Date 1. Increasing the concentration of reactants in a solution _ the frequency of collision of particles and the rate of reaction. (0012 2. The greater the size of particles, the is the ZIPGRADE.COM surface area. 3. Not all reactions happen at the same speed. Some are while others are fast. 4. Increasing the concentration means, there is more of PHYSICAL SCIENCE in the solution. 5. The smaller the size of particles, the is the surface area. WORD BOX 7 ABC DE A. greater C. slow E. solute B. increases D. smaller II. Read each statement carefully. Shade A if the statement is true, or B if it is false. 10 ABCDE 6. Wastes such as crop remains, manure, and garbage are good sources 11 1 8 CDE of biomass. Student's signature: 12 A B C DE 7. Solar energy is abundant, requires low maintenance, and is environmentally-friendly. 13 A B C DE 8. Nonrenewable source is produced from sources that do not deplete or 14 ABCDE Parent/Guardian's Signature: can be replenished within a human's life time. 15 A B C DE 9. Wind turbines are installed in strategic locations to harness the mechanical energy from wind. 10. The cushion is a chemical medium that allows the flow of electrical charge between the cathode and anode. SUMMATIVE TEST 4 (QUARTER 3) PHYSICAL SCIENCE GRADE 12 II. Analyze the following questions then choose the letter of the correct answer. 11. What is the name given to a catalyst in the human body? 17. It is the maximum amount of product you would expect from a A. Biology C. Catalyst reaction based on the amount of limiting reagent B. Chemical D. Enzyme A. Theoretical yield C. Excess Reactant B. Limiting Reactant D. Product Difference 12. What must happen before a chemical reaction can begin? A. The activation energy must be exceeded. 18. In the equation Mg+HCI-MgC12+H2, how many molecules of B. The activation energy must be reached. hydrogen do we need to make hydrogen balanced? C. The concentration of reactant molecules must be reduced. A. 3 C. 2 D. The concentrations of products and reactants must be equal. B. 6 D. 7 13. A substance that increases the rate of a reaction without being used 19. It is the reactant that produces a lesser amount of product. up during the reaction is called a A. Theoretical yield C. Excess Reactant A. Catalyst C. Reactant B. Limiting Reactant D. Product Difference B. Product D. Solute 20. What is the calculation of the relationship of reactant and product 14. Which of the following is a/ are way/s to increase the speed of chemical equation? reaction? Choose all that apply. A. Molality A. Raise the temperature. C. Add a catalyst. B. Balancing Equation B. Add more reactants. D. Add more products. C. Stoichiometry D. Percent Yield 15. Which of the following will lower the rate of reaction? A. Adding an enzyme to the reaction. B. Decreasing the temperature from 40C to 10.C. C. Breaking a chunk of calcium up into smaller pieces. D. Increasing the amount of solute dissolved in solution 16. Which of the following equation below is balanced? A. Al+302-2A1203 C. 4Al+302-A1203 Prepared by: B. 4Al+02-2A1203 D. 4Al+302-2A1203 Louella C. Art