The pictures labeled i and ii show fossils from a sediment core collected from the floor of the atlantic ocean, east of south carolina. the sediment has not been disturbed by landslides or mountain building or other processes. the pictures were taken by brian huber, of the smithsonian institution, using a scanning electron microscope. the two samples in the sediment core were separated by the unique layer marking the extinction that killed the dinosaurs. which is correct? a. ii is older than the unique layer, and thus sat above the unique layer in the sediment on the sea floor. b.i is older than the unique layer, and thus was bathed in diet pepsi on the sea floor. c.ii is older than the unique layer, and thus sat below the unique layer in the sediment on the sea floor. d. i is older than the unique layer, and thus sat below the unique layer in the sediment on the sea floor.

Why slip off slopes are found on the inside of meanders? why river cliffs are found on the outside of meanders?

What is unusual about the iraq mountains ,in spite of their old age?

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?