Rock samples from holes drilled into Earth's crust provide direct evidence about Earth's ___________.
What is Earth's interior?
100
There are ________ main categories of igneous rocks.
What is two?
100
Sand grains, pebbles, mud, shells and leaves are all examples of ___________________.
What is sediment?
100
Any rock changed by heat and pressure are called ______________ rocks.
What are metamorphic?
100
Mantle material rises in ____________ currents.
What is convection?
200
The 4 main layers of the Earth, starting from the surface going toward the center are.....
What are the Crust, Mantle, Outer Core and Inner Core?
200
Rock which comes from lava cooling very quickly is called _______________.
What is extrusive?
200
Sedimentary rock is fromed from two processes....what are they?
What are weathering and erosion?
200
What two things are needed to create metamorphic rock?
What are heat and pressure?
200
When scientific work conflicts with the beliefs of society, a ____________ can arise.
What is a controversy?
300
The movement of the liquid metals in the _________ __________ create the Earth's magnetic field.
What is the outer core?
300
Scientists use three things to classify igneous rocks...what are they?
What are origin, texture (of grains) and mineral composition?
300
Sediment is deposited and ________________ together to form new rock.
What is compacted or cemented?
300
What are two useful metamorphic rocks?
What are marble and slate?
300
The purpose of repeated experimental trials is to validate __________________.
What are conclusions?
400
Pressure and temperature both ___________ as you travel further into the Earth.
What is increases?
400
Intrusive rock forms from ________________ which cools very slowly.
What is magma?
400
What type of rocks can become sedimentary?
What are igneous and metamorphic?
400
What rocks can form into metamorphic rocks?
What are sedimentary rocks, igenous rocks and metamorphic rocks?
400
Observations that deal with descriptions, and can not be expressed in numbers are called _________________.
What is qualitative?
500
Geologlists' main evidence about the structure of Earth's interior comes from ______________ and _________ ____________.
What are rocks and seismic waves?
500
An igneous rock commonly used as a building material is ____________.
What is granite?
500
Sedimentary rocks are classified by the size of their __________.
What are grains?
500
Geologists classify metamorphic rocks according to their _______________ markings.
What is foliated?
500
Convection causes huge slabs of rock to rise and sink slowly through the Earth's mantle. The main heat source for this movement is the Earth's __________ and __________.