1) What are the four major layers of the Earth? a) Crust, mantle, atmosphere, biosphere b) Core, crust, ocean, lithosphere c) Crust, mantle, outer core, inner core d) Asthenosphere, crust, mantle, core 2) Which layer is the thinnest and outermost part of the Earth? a) Mantle b) Crust c) Inner Core d) Outer Core 3) What is the most abundant element in the Earth's Crust? a) Hydrogen b) Helium c) Oxygen d) Carbon 4) Where is the lithosphere located? a) Below the outer core b) Inside the inner core c) In the upper mantle and crust d) Between the core and mantle 5) Why does the asthenosphere allow tectonic plates to move? a) Because it is solid b) Because it is brittle c) Because it contains water d) Because it is soft and flows 6) What drives the movement of tectonic plates? a) Moon’s gravity b) Earth's rotation c) Convection currents in the mantle d) Ocean tides 7) Where do convection currents occur in the Earth? a) Crust b) Lithosphere c) Mantle d) Inner Core 8) How do convection currents in the mantle work? a) Heat moves sideways b) Cold material rises c) Heat rises and cooler material sinks d) Materials move randomly 9) What is the layer beneath the crust and above the outer core? a) Inner Core b) Asthenosphere c) Mantle d) Lithosphere 10) What is the temperature range in the mantle? a) 100°C–400°C b) 900°C–3700°C c) 4000°C–6000°C d) 0°C–100°C 11) Where is the Moho located? a) Between the crust and core b) Between the outer core and mantle c) Between the crust and mantle d) At the surface of the Earth 12) What does the Gutenberg discontinuity separate a) Crust and mantle b) Inner core and outer core c) Mantle and outer core d) Ocean and land 13) Where can the Lehman discontinuity be found? a) Between the crust and mantle b) Between the ocean and crust c) Between the inner and outer core d) Between the mantle and outer core 14) What type of rock is the oceanic crust made of a) Granitic b) Basaltic c) Sedimentary d) Marble 15) How thick is the oceanic crust? a) 70 km b) 5 km c) 10 km d) 50 km 16) What is the temperature of the inner core? a) 3700°C b) 1000°C c) 6000°C d) 400°C 17) What is the layer of the Earth located in the uppermost layer of mantle that can break under stress? a) asthenosphere b) lithosphere c) crust d) biosphere e) upper mantle f) lower mantle 18) Magma can be located in what layer of the Earth? a) Asthenosphere b) Biosphere c) Upper Mantle d) Lower Mantle 19) What is the ability of asthenosphere to flow? a) Fluidity b) Plasticity c) Volatility d) Density 20) What is Continental crust made of? a) Basaltic rocks b) Sedimentary rocks c) Marbles d) Granitic rocks

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