Unit 5 Lesson 4&5 Vocabulary Crossword
                       
                       
                       
                       
                       
                       
                       
                       
                       
                       
                       
                       
                       
                       
                       
                       
                       
                       
                       
 
 
Down: 1) one of Earth’s major land ecosystems, each with its own kind of climate, soil, plants, and animals2) a substance that pollutes a material3) a large, treeless plain in the arctic regions where the ground is frozen all year4) a form of oxygen gas forming a layer in Earth’s atmosphere that screens out much of the Sun’s ultraviolet rays5) plant or animal species that have been introduced into an environment that is outside their native range8) a type of air pollution formed by particles produced by burning fossil fuels13) trash that is unlawfully disposed of outside Across: 6) an ecosystem where water is near the surface of the soil much of the time7) a forest ecosystem with many kinds of trees that lose their leaves each autumn9) a biome located relatively close to the equator that is hot and humid, and has abundant rainfall10) a cool forest ecosystem of conifers (evergreens) in the upper Northern Hemisphere11) combination of fresh and salt water12) the boundary where a fresh water ecosystem meets a saltwater ecosystem14) the addition of harmful substances to the environment15) the average weather pattern of a region16) a sandy or rocky ecosystem with little precipitation and little plant life17) a biome in which various species of grasses are the main form of plant life
 

 

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