Q: What type of aquifer is trapped between two impermeable rock layers? Read this paragraph and choose the correct option from the provided answers: Sometimes an aquifer is confined. A confined aquifer is trapped between two impermeable rock layers. Pressure from the rock layer on top forces the water out where the aquifer reaches the ground surface. Water that flows up to the surface naturally is an artesian spring . If people drill a well into a confined aquifer, the water may flow to the surface without assistance. This is an artesian well ( Figure below ). Choices: - abandoned - solid - segmented - confined A:
confined
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Q: Explosive eruptions associated with what can be tens of thousands of times as powerful as an atomic bomb? Read this paragraph and choose the correct option from the provided answers: An explosive eruption produces huge clouds of volcanic ash. Chunks of the volcano fly high into the atmosphere. Explosive eruptions can be tens of thousands of times as powerful as an atomic bomb ( Figure below ). Hot magma beneath the surface mixes with water. This forms gases. The gas pressure grows until it must be released. The volcano erupts in an enormous explosion. Choices: - forest fires - hurricanes - earthquakes - volcanoes A:
volcanoes
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Q: Which chemical element is the basis of all life on earth? Read this paragraph and choose the correct option from the provided answers: Carbon is an element. Carbon is the basis of all life on Earth. Since carbon can combine with many other elements it forms a variety of different substances. Choices: - oxygen - nitrogen - hydrogen - carbon A:
carbon
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Q: What do you call different organs working together? Read this paragraph and choose the correct option from the provided answers: Choices: - cellular system - endocrine system - maturation systems - organ systems A:
organ systems
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