Energy Potpourri Heat Transformation Radioactivity 100 100 100 100 100 200 200 200 200 200 300 300 300 300 300 400 400 400 400 400 500 500 500 500 500 Half Life Energy Half Life for $100 If a radioactive material has a half life of 10 years, what fraction of the material will remain after 30 years? A. B. C. D. 1/2 1/4 1/8 1/16 C. One eighth 1/8 Back to Game Half Life for $200 Radon-222 has a half life of 4 days. If ¼ of the original sample remain, how much time has passed? A. B. C. D. 1 day 16 days 8 days 4 days C. 8 days Back to Game Half Life for $300 The half-life of carbon-14 is 5730 years. How much of an 80g sample will remain after 17,190 years? A. B. C. D. 40 g 80 g 20 g 10 g D. 10 grams Because 3 half-lives have passed Back to Game Half Life for $400 An original sample of the radioisotope fluorine-21 had a mass of 80.0 milligrams. Only 20.0 milligrams of this original sample remain unchanged after 8.32 seconds. What is the half-life of fluorine21? A. 1.04 s B. 2.08 s C. 4.16 s D. 8.32 s C. 4.16 s Back to Game Half Life for $500 U-235 has a half-life of 704 million years. A sample of rock was found to contain ¼ of the U-235 atoms present when it formed. What is the approximate age of the rock? A. 1.4 billion years B. 704 million years C. 352 million years D. 2.8 billion years A. 1.4 billion years (2 half-lives passed) Back to Game Energy Transformation for $100 What do a toaster, a hair dryer, and an iron have in common? A. They convert electrical energy to heat energy. B. They convert electrical energy to mechanical energy. C. They convert mechanical energy to electrical energy. D. They convert heat to electrical energy. A. They convert electrical energy to heat energy. Back to Game Energy Transformation for $200 Which best describes the energy transformation that takes place in the picture below? A. Light to Heat B. Mechanical to Chemical C. Chemical to Light D. Electrical to Light C. Chemical to Light Back to Game Energy Transformation for $300 A pendulum bob swings back and forth in an arc. Which describes the energy conversion process in one swing of the pendulum from left to right. A. Kinetic energy to chemical energy to potential energy B. Kinetic energy to potential energy back to kinetic energy C. Potential energy to kinetic energy back to potential energy D. Potential energy to kinetic energy to electromagnetic energy C. Potential energy to kinetic energy back to potential energy Back to Game Energy Transformation for $400 Which best describes the energy transformation that takes place in the picture below? A. Mechanical to Light B. Heat to Sound C. Heat to Mechanical D. Sound to Light B. Heat to Sound Back to Game Energy Transformation for $500 Heterotrophs consume food to obtain energy for biological processes. During exercise, the chemical energy in food is transformed into what other forms of energy? A. Potential and electrical energy B. Electromagnetic and heat energy C. Mechanical, kinetic, and heat energy D. Potential, electromagnetic, and heat energy C. Mechanical, kinetic, and heat energy Back to Game Radioactivity for $100 The three main types of nuclear radiation are alpha, beta, and gamma. List the three types of radiation from highest penetrating power to lowest penetrating power? Gamma, Beta, Alpha Back to Game Radioactivity for $200 What is a problem commonly associated with nuclear power facilities? A. A small quantity of energy is produced. B. Reaction products contribute to acid rain. C. It is impossible to control nuclear fission. D. It is difficult to dispose of wastes. D. It is difficult to dispose of wastes. Back to Game Radioactivity for $300 An alpha particle is the same as a A. B. C. D. Helium nucleus Hydrogen nucleus Beta particle Gamma ray A. Helium nucleus Back to Game Radioactivity for $400 The final elements produced by radioactive decay differ from the original radioactive elements because the nuclei of the final elements are always A. more stable. B. increased in mass. C. half as radioactive. D. positively charged. A. more stable. Back to Game Radioactivity for $500 Which would penetrate a car door made of aluminum? A. Alpha particles B. Beta particles C. Gamma rays D. Helium nuclei C. Gamma rays Back to Game Energy for $100 Nuclear fission produces energy when __ A. Two atomic nuclei combine B. An atomic nucleus splits C. A chemical reaction occurs D. Helium transmutes into hydrogen B. An atomic nucleus splits Back to Game Energy for $200 Turbines from a hydroelectric dam convert what type of energy into electrical energy? A. Chemical B. Sound C. Mechanical D. Light C. Mechanical Back to Game Energy for $300 Two 1kg apples hang from a tree branch, one near the top of the tree and the other on a lower branch. Which apple has the most gravitational potential energy? The apple near the top of the tree Back to Game Energy for $400 Which of the following is an example of light energy being converted into chemical energy? A. The sun unevenly heating Earth’s surface B. Water evaporating and condensing in the water cycle C. Plants producing sugar during the day D. Lava erupting from volcanoes for many days C. Plants producing sugar during the day Back to Game Energy for $500 How can you increase the kinetic energy of a pickup truck without increasing the truck’s speed? Increase the truck’s mass Back to Game Heat for $100 The transfer of heat by the movement of air currents in Earth’s atmosphere is an example of — A. conduction B. convection C. radiation D. fusion B. convection Back to Game Heat for $200 Between points 2 and 3, energy is being used to — A. B. C. D. melt ice heat water evaporate water heat water vapor A. melt ice Back to Game Heat for $300 A man who was sleeping wakes up because he hears the smoke alarm go off in his house. Before opening the bedroom door, the man feels the door to see whether it is warm. He is assuming that heat would be transferred through the door by — A. conduction B. convection C. radiation D. compression A. conduction Back to Game Heat for $400 Ms. Markas takes a thermos bottle filled with hot coffee to work each day. The thermos bottle keeps the coffee hot by A. B. C. D. Using a battery powered heating element Collecting solar heat energy Recirculating hot air inside Slowing heat transfer D. Slowing heat transfer Back to Game Heat for $500 Suppose four pieces of metal, with masses 10g, 100g, 500g, and 1kg, are heated. According to the equation Q=mct, which piece of metal requires the most heat energy to go from 10 oC to 20 oC? 1 kg piece of metal (remember 1 kg = 1000 g) How much do you want to risk? What are 3 things you can do to help make sure you do well on your GHSGT? 1. Pay attention in class and study 2. Get plenty of rest 3. Eat a good breakfast Which team won?