As atmospheric gases warm, they will rise up higher in the atmosphere. the opposites is also atmospheric gases cool down, the air will sink. this occurs over and over and air is heated and cooled. which of these is the main factor that would contribute to this constant movement of the air? a) density b) mass c) matter d) electricity

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?

Ineed this answered asap the north korean communist government a. controls crop production and distribution. b. is not involved in crop production and distribution. c. exports its huge rice surplus to other countries. d. allows farmers to choose which crops to grow but controls where the crops are sold. which statement below is true? a. east asian nations are members of nafta. c. industry and production is not an important aspect of east asian economics. b. east asian nations are economically independent. d. the economies of most east asian countries are mixed or market systems. what is the main idea of this passage? a. the city of hiroshima can never fully recover from the atomic bombing of 1945. b. hiroshima is more modernized than any other city in japan. c. after being bombed, hiroshima was rebuilt and became a thriving urban port. d. the city of hiroshima has an extensive park system dedicated to peace.

In russia which of these challenges affects the transportation of both petroleum products and other goods? a poorly repaired roads b harsh weather and vast distances c frozen waterways d separatist movements