Graph 1 shows how cyclical changes in the Sun caused predictable changes in the solar intensity reaching Earth’s atmosphere. Graph 1 also shows how much the global surface temperature has moved from the long-term average. Graph 2 shows observations of global temperature (black line). The blue line is a temperature model where only natural forces, such as volcanic eruptions, are considered. The red line is a temperature model of both natural forces and human effects (activities). Study the graphs, and answer the questions that follow. Graph 1 a graph showing a constant gradual rise in global temperatures since 1980 and a graph showing that the amount of the Sun's energy reaching the atmosphere has risen and fallen regularly since 1980 Graph 2 a graph showing the observed changes in average global temperature, a temperature model that considers the effect of natural forces on temperature change, and a temperature model that considers both natural and human effects on temperature change Part A

Based on graph 1, do you think the changes in solar intensity are a significant cause of the trend in global temperatures? Why or why not?

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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?

Explain how the movement of tectonic plates causes the development of different landforms and naturak disasters