Question

25. A is an A. gate B. vent opening on the top of a mountain through which lave erupts. C. river D. door E, window 26. Shield volcanoes are A. broad B. gently sloping C. composed of solidified lava flows D. composed of lava tubes E. all of the above 27. A fluid's resistance to flow is called A. temperature B. density C. viscosity D. mass E. heat 28. Volcanoes effect A. atmosphere B. biosphere C. geosphere D. hydrosphere E. all of the above 29. Ultramafic igneous rocks have a high content of A. diamond B. potassium C. hydrogen D. ferromagnesian minerals E. carbon is the picking up and physical removal of rock particles by an agent such as 30. wind, flowing liquid water, or glaciers. A. Erosion B. Reclamation C. Plantation D. Deposition E. Accumulation

Answer 1

25. B. Vent, it is the mouth of the volcano from where the lava flows.

Gate, door, window are non-geological terms in this case. The river cannot be such an opening on top of the mountain through which lava erupts.

26. E. All of the above, Shield volcanoes contain a broad dome, with a gentle slope (slope 10-15%), cones contain solidified lava flows and such volcanoes also contain lava tubes.

27. C. Viscosity, it provides resistance to fluid flow, more the viscosity with less velocity the fluid will flow.

Rest all may be related to the resistance provided but itself does not provide resistance to fluid flow.

28.E. All of the above

The gases coming out from volcano pollutes the atmosphere which indirectly affects the organisms breathing in the atmosphere, so, it affects the biosphere. Volcanic activities can trigger earthquake by shifting Earth's crust, so, it is affecting geosphere and due to volcanic eruption and lava ashes, the oceanic temperature rises, hence hydrosphere is affected.

29. D. ferromagnesian minerals, it consists of low silica, low potassium, and high mafic minerals.

Rest all are either low or absent in ultramafic igneous rocks.

30.A. Erosion, it is the process of removal of rock particles by different agents.

Rest all are different types of processes of deposition or accumulation kind of or similar.