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Study
Clara - Spheres of Earth
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Do metamorphic rocks melt?
no
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What are minerals?
natural materials that make up most rocks
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What causes metamorphic rocks?
formed from other rocks that were transformed due to heat or pressure
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What mineral is extracted from mines?
coal
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What are the five properties of minerals?
colour, density, shape, lustre, and hardness
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What are the four spheres of Earth?
geosphere, hydrosphere, biosphere, and atmosphere
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What are the four external processes that change the Earth's surface?
breaking down of rocks, erosion, transport, and deposition
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What is lustre?
how shiny a mineral is
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What is an ore?
mineral from which the metal is extracted
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What are mines?
deep excavations with shafts and tunnels
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What do we call the materials that are deposited?
sediments
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What is density?
the relationship between the mass of the mineral and its volume
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What is the softest mineral?
gypsum
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What rocks do we use in construction?
clay to make bricks and tiles; marble and granite to make buildings
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What mineral is extracted from quarries?
granite
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What is soil?
the outer layer of Earth's crust
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What is created when sand is deposited by water?
beaches
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What is formed when Earth's internal energy causes parts of the crust to rise?
mountain ranges
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Are all minerals always the same color?
no; some minerals can occur in many different colors
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Is the inner core solid or liquid?
solid
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What is transport?
water and wind cary eroded materials from one place to another
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What forms volcanoes?
magma flows out through cracks of the Earth's surface
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Is the creation of depressions sudden or slow?
very slow
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What are the two ways rocks are broken down?
water freezing in their cracks and roots of plants growing in the cracks
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What are fossils and what type of rocks are they contained in?
remains of living things; sedimentary rocks
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What minerals are used to make jewelry?
gold, silver, diamonds, and rubies
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What is the geosphere?
rocky part of Earth
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What are the four uses of minerals?
obtain metals, make jewelry, obtain other substances, and make electronic computers
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What is the hydrosphere?
all the Earth's waters
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What do underwater volcanoes create? Give an example.
islands; Islas Canarias
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What is the core?
innermost layer of the geosphere
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What is magma?
molten rocks
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What is the biosphere?
all living things and places where they live
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What are the three types of rocks?
igneous, sedimentary, and metamorphic
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What two agents remove materials from rocks and soil?
water and wind
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What is created when rivers and streams erode from their beds?
valleys
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What is the crust?
outermost layer of the geosphere; where life exists
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What are quarries?
open-pit mines
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What rocks do we use for transport?
fuel obtained from petroleum
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Where are the two places rocks and minerals are extracted from?
quarries and mines
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What are rocks and what are they made up of?
materials that make up the geosphere; made up of one or more minerals
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What is the mantle?
layer below the crust; contains molten rocks called magma
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What causes igneous rocks?
magma
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What is the atmosphere?
layer of gases that surrounds earth; made up of air
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What is the hardest mineral?
diamond
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What is formed when Earth's internal energy sometimes causes part of the crust to sink?
depressions
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What causes changes in the landforms of the Earth's surface?
internal energy due to the high temperatures of the Earth's interior
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What are the three layers of the geosphere?
crust, mantle, and core
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What is created when sand is deposited by the wind?
deserts
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What are the two ways igneous rocks are formed?
slow cooling of magma that comes to the surface when crust erodes; lava cooling quickly
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What is a mineral's hardness?
how easily it can be scratched
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What is deposition?
materials settle when the water or wind stops
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Is the formation of volcanoes sudden or slow?
sudden
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What are the two major depressions of Spain?
Depresión del Ebro and Depresión del Guadalquivir
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What are the two types of shapes minerals can have?
regular and irregular shapes
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What causes sedimentary rocks?
accumulation of sediments over thousands of years
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Is the outer core solid or liquid?
liquid
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What are the three main uses of rocks?
obtain energy, construction, and industry
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What rocks do we use in industry?
plastics, paints, and fertilizers from petroleum
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