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Humans have relied on biofuels since they discovered fire. Biofuels are organic materials from plants and
animals. Wood, crops, and landfill mass can all be used to create blofuels. For centuries, blomass-any organic
matter, but mostly wood and crop waste-was burned to create heat. Today, blomass is used for creating the
energy we use for heat and cooking. Biomass is also used to create natural gas for fueling cars. Biomass emits
methane gas as it decomposes. That gas can be used to create energy or can be burned to create heat. Biofuels
are renewable resources. That means that they are relatively easy to replace.
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Biomass is
A invisible
B abundant
C immense
D useless
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Question 3.0

Lesson 10: crossing borders: unit test “borders” 1.what does the mother’s refusal to state her nationality as canadian or american signify? a)that she resents governmental interference with her life b)that she identifies with neither country c)that she comes from somewhere else d)that she is stubborn and proud 4.the author’s chosen visual images, sensory details, and dialogue all convey a particular feeling in “delfino ii: diez in the desert.” thus feeling is known as: a)tone b)mood c)pathos 5.compare and contrast the poem “mexicans begin jogging” and the story “delfino ii: diez in the desert.” a)both are written about similar themes (immigration), but the story has a more serious mood than the poem b)both focus on mexican immigrants, but the story has a lighter tone than the poem. c)both main characters are afraid: diez is afraid of being caught smuggling people over the border, and soto is afraid of being caught working illegally. d)the tone in both selections is similar, but the subject matter differs slightly. 15. the tone of the poem “ka’ba” versus the tone of the poem “harlem ii” might be described as a)grateful vs ungrateful b)certain vs doubtful c) hurtful vs defeated d)safe vs dangerous