Unit 5 Lesson 4&5 Vocabulary Crossword
                      
                      
                      
                      
                      
                      
                      
                      
                      
                      
                      
                      
                      
                      
                      
                      
                      
                      
                      
                      
 
 
Down: 1) a large, treeless plain in the arctic regions where the ground is frozen all year2) a sandy or rocky ecosystem with little precipitation and little plant life3) a forest ecosystem with many kinds of trees that lose their leaves each autumn5) plant or animal species that have been introduced into an environment that is outside their native range9) the boundary where a fresh water ecosystem meets a saltwater ecosystem12) a substance that pollutes a material Across: 4) one of Earth’s major land ecosystems, each with its own kind of climate, soil, plants, and animals6) a biome in which various species of grasses are the main form of plant life7) an ecosystem where water is near the surface of the soil much of the time8) the average weather pattern of a region10) a type of air pollution formed by particles produced by burning fossil fuels11) a cool forest ecosystem of conifers (evergreens) in the upper Northern Hemisphere13) the addition of harmful substances to the environment14) a form of oxygen gas forming a layer in Earth’s atmosphere that screens out much of the Sun’s ultraviolet rays15) a biome located relatively close to the equator that is hot and humid, and has abundant rainfall16) combination of fresh and salt water17) trash that is unlawfully disposed of outside
 

 

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