The activity is launched in separate browser tab or window. Please use appropriate browser navigation to switch windows/tabs.This activity must be completed in a desktop browser that supports the Adobe Flash player.This activity must be completed on a desktop computer, it is not available on a tablet device.

Terms of Use

Please review our Terms of Use , which also governs your visit to cengage.com, to understand our practices.


Photography Credits

All photographs used in this product have been copyrighted by the photographer or agency cited below and are used under license by National Geographic Learning


About MyELT

©Africa Studio/Shutterstock


Animals

(butterfly) ©Marcio Jose Bastos Silva/Shutterstock.com; (parrot) ©Creatas/Jupiterimages; (bears) ©AlaskaStock; (reef) ©Pawe? Borowka/Shutterstock.com; (turtle) ©Benjamine Albiach Galan/Shutterstock.com; (owl) ©Robert Muth/Shutterstock.com; (sea turtle) ©Lawrence Cruciana/Shutterstock.com; (penguins) ©DigitalStock/Corbis; (eagle) ©FloridaStock/Shutterstock.com; (tiger) ©Justin Black/Shutterstock.com; (foxes) ©dean bertoncelj/Shutterstock.com; (fish) ©cbpix/Shutterstock.com; (elephants) ©DLILLC/Corbis; (caterpillar) ©Digital Vision/Getty Images; (flamingo) ©DigitalStock/Corbis; (squirrel) ©Digital Vision/Getty Images; (gorilla) ©Digital Vision/Getty Images; (eagle owl) ©Value Stock Images/Unlisted Images; (seal) ©PhotoDisc/Getty Images; (dolphin) kristian sekulic/Shutterstock.com; toucan) ©PureStock/SuperStock; (kingfisher) ©DigitalStock/Corbis; (jaguar) ©Ewan Chesser/Shutterstock.com; (meerkat) ©EcoPrint/Shutterstock.com.


Plants & Landscapes

(iceberg) ©PhotoDisc/Getty Images; (sea fan) ©Creatas/Jupiterimages; (Kaffir lily) ©James Porte/National Geographic Creative; (dandelion) ©Andrew Williams/Shutterstock.com; (Vermillion Cliffs) ©oksana.perkins/Shutterstock.com; (volcano) ©juliengrondin/Shutterstock.com; (dandelion) ©Kristina Stasiuliene/Shutterstock.com; (monkey pocket) ©hin255/Shutterstock.com; (orchids) ©Creatas/Jupiterimages; (pond lily) ©Creatas/Jupiterimages; (river) ©PhotoDisc/Getty Images; (leaves) ©Digital Stock/Corbis; (mountain range) ©DigitalStock/Corbis; (baobab trees) ©Corbis Super RF/Alamy; (road) ©Eric Gevaert/Alamy; (waterfall) ©tororo reaction/Shutterstock.com; (desert) ©Pichugin Dmitry/Shutterstock.com; (prairie) ©kavram/Shutterstock.com; (forest) ©Paul Aniszewski/Shutterstock.com; (arch) ©DigitalStock/Corbis; (leaf) ©DigitalStock/Corbis; (mountains) ©PhotoDisc/Getty Images; (orchid) ©Creatias/Jupiterimages; (Torres del Paine) ©Eyewire.


Natural & Abstract Backgrounds

(clover) ©PhotoDisc/Getty Images; (bubbles) ©PhotoDisc/Getty Images; (snow) ©PhotoDisc/Getty Images; (lily pad) ©PhotoDisc/Getty Images; (blue plants) ©PhotoDisc/Getty Images; (brushed) ©PhotoDisc/Getty Images; (metal spiral) ©PhotoDics/Getty Images; (frost) ©Photo Disc/Getty Images; (cylinders) ©PhotoDisc/Getty Images; (rods) ©PhotoDisc/Getty Images; (water) PhotoDisc/Getty Images; (fish scales) ©Corel; (basalt pebbles) ©Patrick Laverdant/iStockphoto; (swirl) ©PhotoDisc/Getty Images; (red pattern) ©Emelyanova/Shutterstock.com; (seashell) ©Jupiterimages/Comstock Images/Alamy Images; (leaves) ©BananaStock/Jupiterimages; (white pebbles) ©Invisible/Shutterstock.com; (fern) ©Image Source; (sand) ©John Foxx Images/Imagestate; (sand patterns) ©Image Source; (dunes) ©John Foxx Images/Imagestate; (flowers) ©PhotoDisc/Getty Images; (blue water) ©John Foxx Images/Imagestate


Space

(hurricane) ©PhotoDisc/Getty Images; (earth) ©Digital Vision/Getty Images; (Venus) ©Dmitry Bodrov/Shutterstock.com; (red spot) ©MediaClip; (Helix Nebula) ©JPL-Caltech/Univ of Arizona; (galaxy) ©Digital Stock/Corbis; (Cas A) ©NASA; (Antenna galaxies) ©NASA; (moon) ©PhotoDisc/Getty Images; (starburst galaxy) ©X-ray: NASA/CXC/JHU/D.Strickland, Optical: NASA/ESA/STScI/AURA/The Hubble Heritage Team, IR: NASA/JPL-Caltech/Univ. of AZ/C. Engelbracht; (sun) ©NASA; (planet) ©Stockbyte/Getty Images; (comet) ©Digital Vision/Getty Images; (starbirth) ©PhotoDisc/Getty Images; (spiral galaxy) ©PhotoDisc/Getty Images; (Saturn) ©PhotoDisc/Getty Images; (ring) ©PhotoDisc/Getty Images; (Aurora borealis) ©Pi-Lens/Shutterstock.com; (Io ) ©NASA/JPL; (Jupiter moons) ©NASA; (galaxy M82) ©NASA/JPL-Caltech/Univ. of AZ/C. Engelbracht; (M82) ©NASA/ESA/STScI/AURA/The Hubble Heritage Team; (Orion nebula) ©NASA, ESA, T. Megeath (University of Toledo) and M. Robberto (STScI); (night) ©Robert Llewellyn/Corbis.