A rock started out with 8,000 atoms of stable (parent) radioisotope x and none o

Question

A rock started out with 8,000 atoms of stable (parent) radioisotope x and none of its stable (daughter) f. We now find in it 1,000 atoms of x and 7,000 atoms of y. The half-life of X is 10 million years. The rock is ____ years old. (a) 20 million (b) 30 million (c) 40 million (d) 70 million (e) The age cannot be determined from the information given The Rock cycle implies that (a) all rocks are formed through plate tectonic through subduction of tectonic plates (b) carbon cycle and hydrologic cycle that controls plate tectonics also controls formation of all other rocks (b) Igneous rocks are created along divergent plate boundaries and consumed at subduction zones along convergent plate boundaries (d) all rocks are formed through hydrologic cycle (e) one type of rock may be altered to form any type of rock. Choose the correct sequence of the formation of elastic sedimentary rocks (a) weathering --- erosion --- transportation -- deposition -- lithification (c) lithification -- transportation -- weathering --- erosion --- deposition (d) erosion --- deposition --- lithification -- transportation -- weathering (e) weathering --- deposition --- erosion --- lithification --- transportation How does urbanization (buildings, pavements, etc.) affect infitration and runoff in a small, previously forested, drainage basin? (a) both increase (b) both decrease (c) infitration increase, runoff decreases (d) infiltration decreases, runoff increases (e) both do not change which of the following sequence best describes the Earth's interior (from surface down)? (a) ithosphere, upper mantle, lower mantle, asthenosphere, outer crust, inner curst, core. (b) lithosphere, asthenosphere, outer core, inner core, upper mantle, lower mantle, (c) lithosphere, asthenosphere, upper mantle, lower mantle, outer core, inner core (d) crust, asthenosphere, lower mantle, upper mantle, inner core, outer core, lithosphere (e) al the above are correct depending upon the type of plate movement. Which of the following do not match correctly? (a) Quartz, calcite, Kaolin = minerals (b) Limestone, salt (Halite), coal = Volcanic pyroclastic rocks (c) Granite, Sandstone, Marie = rocks (d) pebble, Sand, silt, Clay = sediments (e) Granite, Basalt, Andesine = Igneous rocks The most abundant rock on the surface of the Earth is;and the majority of the Earth's crust is composed of (i.e, % Volume within earth's crust)_______ and _________ (a) Shale; limestone and sandstone (b) granite; sedimentary rocks and metamorphic rocks (d) shale; igneous rocks and met am, orphic rocks (e) granite; shale ad limestone

Explanation / Answer

Question 7) answer) option a)

Reason : The formation of a clastic sediment and sedimentary rocks involves five processes

1) weathering 2) erosion 3) transportation 4) deposition

5) lithification

Question 9) answer) option c)

Reason : generally earth is made of lithosphere the outer crust that we live on, below which is asthenosphere, next comes the plastic-like mantle, the liquid outer core, and the solid inner core.

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