1. The innermost section of the Earth is the _____.*1 pointA. CoreB. MantleC. CrustD. Sial2. The part of the earth’s crust that is covered by oceans and seas is called___________*1 pointA. BiosphereB. LithosphereC. StratosphereD. Hydrosphere3. Which of the following is not a characteristic of sedimentary rocks? They*1 pointA. Contain fossilsB. Are crystallineC. Are usually laid down in layersD. are porous4. The part of the Earth’s crust which is made of silica and alumina is the ______*1 pointA. SimaB. MantleC. BarrysphereD. Sial5. The part of the earth where life exist is the __________*1 pointA. HydrosphereB. BarysphereC. BiosphereD. Atmosphere6. The earth is enveloped by a mixture of gases referred to as the ____________*1 pointA. HydrosphereB. BarysphereC. BiosphereD. Atmosphere7. Which of the following is not a characteristic of sedimentary rocks?    *1 pointA. Contains fossilsB. Are crystallineC. Are usually laid down in layersD. Are porous8. Rocks which have been formed by the cooling and solidification of molten magma are called_______________*1 pointA. Igneous rockB. Sedimentary rockC. ConglomeratesD. Metamorphic rock9. Metamorphic rocks are _________*1 pointA. Rocks transformed under great heat and pressureB. Formed by cooling and solidification of molten magmaC. Mechanically formed rocksD. Stratified rocks10. Another name for the core of the earth is _________*1 pointA. LithosphereB. BarysphereC. TroposphereD. Endosphere11. Rock of the core in the earth are rich in ______________*1 pointA. Iron and nickelB. Silicon and magnesiaC. Iron and magnesiaD. Silica and nickel12. Convection occurs when materials move in currents due to differences in___________*1 pointA. Heat and densityB. Pressure and densityC. Climate and WeatherD. Temperature and humidity13. Inside Earth's mantle, when pieces of rock and crust become very hot and less dense, they ______________*1 pointA. RiseB. FlyC. ConvergeD. Divert14. The cooling parts of the mantle at the surface become denser and ____________     *1 pointA. SinkB. BreakC. MultiplyD. Flow15. Scientists have used precise measurements to discover that plates move at a very slow rate of _____________ per year.*1 pointA. One to ten centimetresB. Two to five centimetresC. Three to five centimetresD. Four to six centimetres16. Plate boundaries interact with each other in ____________ primary ways giving the types of plate boundaries*1 pointA. 2B. 3C. 4D. 517. ____________ plates pull apart from each other. *1 pointA. ConvergentB. UltravioletC. VolcanicD. Divergent18. ____________ plates push boundaries together.*1 pointA. TransformB. VolcanicC. ConvergentD. Divergent19. The three mechanisms that cause plate movement on Earth are_________ *1 pointA. Thermal convection, ridge push, and slab pullB. Density, heat and gravityC. Climate, relief and timeD. Volcano, earthquake and Tsunami20. The following are characteristics of the Atmosphere except___________*1 pointA. Over 99% lies within 30km of the earth surfaceB. Its density decreases progressively with elevationC. It contains water in form of vapor in lower layersD. It is about 3476km in radius or width all round