Show:
Definitions
Comparisons
Applications
100
What is density?
how compact a substance is
100
Which is older: the Earth or the universe? How do you know?
the universe is older, because the Earth is part of the universe
100
Daily Double: Draw the interior of the Earth.
** should have 6 layers; majority is core & mantle **
200
Daily Double: Explain what the Moho is.
the boundary between the crust and mantle
200
List the layers of the Earth, from the inside out.
inner core, outer core, lower mantle, upper mantle, Moho, oceanic crust, continental crust
200
Which layer of the Earth is more dense -- the upper mantle or the outer core?
the outer core is more dense, because it is a lower layer
300
What is radioactive decay?
the spontaneous & random transformation of one element into another
300
In a cross-section of the Earth's crust, which layer would be the youngest?
the layer on the top
300
Why does the interior of the Earth have layers?
when the Earth was forming, the rocks melted; the more dense rocks sank toward the center
400
Which part of the Earth is the lithosphere?
the Earth's crust (continental & oceanic) and the stiff, upper mantle
400
Daily Double: Explain the difference between the lithosphere and asthenosphere.
the lithosphere is the Earth's crust & stiff, upper mantle; the asthenosphere is the plastic, lower mantle
400
An object has a mass of 5g and a volume of 10mL. What is the object's density?
density = mass / volume; 5 / 10 = .5 g/mL
500
Which part of the Earth is the asthenosphere?
The lower, plastic mantle
500
Why does ice float in water?
ice floats in water because it is less dense than water
500
How does radioactive decay help scientists?
it can be used to determine the date of objects, like rocks or bone