Why did people see the blast before they heard/felt it? Light travels faster than sound Underground Testing What force caused the craters found at the site to form? Gravity Middle School Science Worksheet Stewards of the Land Answer Key Radioactive particles are smaller than our eyes can see. Thank you for visiting the National Atomic Testing What tool is used to find and measure radiation? Museum! During your journey through our exhibits, Geiger counter be sure to answer the following questions. What shields us best from each type of radiation? When you complete this worksheet, please give it to your teacher, parent, or guardian. Alpha Skin and paper Don’t forget to have fun! Beta Aluminum Introduction to the Test Site Gamma/X-Ray Lead Since being established in 1951, the Nevada Test Neutron Concrete Site (now the Nevada National Security Site) grew from 680 to 1,375 square miles. Which option below is closest to the site’s actual percentage growth over time? A. 100% B. 75% C. 50% NV Science Standards: 5-PS1-1; MS-PS1-1; MS-PS1-4; MS-PS3-5 D. 25% Atmospheric Testing Illustrate what happens during a nuclear fission chain (Watch the “Age of the Atom” film) reaction. EXAMPLE As explained in the film, there are three parts that make up Atom an atom. In the box below, draw an atom and label the proton, neutron, and electron. Atom Splits EXAMPLE Electron 2 Neutrons Released Splits Atom Proton Neutron Neutron Uranium Atom Splits A nuclear weapon’s yield is how we measure the amount of explosive energy it can produce. 1 kiloton = 1 thousand tons of TNT 1 megaton = 1 million tons of TNT Ground Zero Theater Draw a line from each particle that makes up an atom to its Why were people required to wear dark goggles when electric charge. witnessing an atomic test? Proton Negative Charge The blast is brighter and hotter than the sun. If the Neutron Positive Charge individuals were to look directly at the initial flash Electron No Charge without goggles, they would be temporarily blinded. .