The canadian elk has traditionally been limited in its geographic range by the presence of elderberries, its primary source of food, which only grow up until a certain point in the tundra. a recent rise in temperatures, however, has seen a spread in the growth of elderberries northwards into the tundra. therefore, the overall range of the canadian elk can be expected to increase. which of the following, if true, best casts doubt on the argument? a. in addition to elderberry, the canadian elk also consumes loganberries, which are expected to also begin growing at more northerly latitudes. b. during the summer months, many canadian elk are hunted both for sport and for their meat. c. the grizzly bear, the canadian elk’s primary predator, has also started moving north into the tundra. d. the permafrost, the region above the tundra, in which the temperatures never reach above freezing, will unlikely see elderberry growth. e. increasing temperatures have created conditions too warm for elderberry growth in the southern half of the canadian elk’s traditional territory.

Study guide for unit 2 ~ lesson 3 ,4, & 5 test, thursday, january 24th lesson 3 vocabulary erosion - deposition - landform- weathering- short answers 1. how do volcanic islands form? 2.why is deposition likely to occur outside a river bend? 3. in what conditions does soil form fastest? 4. which 2 earth’s systems interact to form a coral island? 5. a beach growing in size is most likely the result of 6. which type of islands are formed when a chunk of land breaks off from a larger landmass? long answers explain how plants can grow in small cracks of rock that do not appear to contain soil. lesson 4 vocabulary pollution - toxic - short answers 1. most farmers pollute soil by purposefully adding 2. what is the benefit of contour plowing? . 3. using nuclear power to produce electricity can cause water pollution by 4. why do scientists predict humans will run out of fossil fuels someday? 5.farmer spray crops with fertilizer and weed killer to the crops grow. how might this affect the hydrosphere? list two different ways you use fossil fuels. 1- 2- what are two other energy sources scientists and engineers are researching? 1- 2- lesson 5 vocabulary decompose- recycling - short answers 1. which of earth’s systems do you interact with when you wash your hands? 2. which of earth’s systems is polluted by exhaust gases from buses pollute? 3. why is it important to dispose of electronic devices properly? 4. where do people interact with all four of earth’s systems?