Correlating Fossils
Which fossil is the oldest?
Trilobites
How do plates move at a divergent boundary
Away from each other
Explain the theory of continental drift
the continents were once joined as a supercontinent and drifted apart
How do you know which layer of rock is the oldest when looking at strata?
it is the one on the bottom
How many layers of earth are there
4
What do we call a fossil that is...
1. spread across a large geographic area
2. lived for a short period of time
Index fossil
what is the result of plate movement at a transform boundary
earthquake
Who came up with the theory of continental drift
Alfred Wegener
List the objects below in the correct order they would be aligned during a lunar eclipse.
earth, moon, sun
sun, earth, moon
Which layer is the only one that is liquid
outer core
What can a fossil tell us about the rock it is found in
the relative age
what are the two types of tectonic plates
oceanic and continental
convection currents
Describe why we see lunar phases throughout the month.
The moon's revolution around the earth
Which layer mostly makes up tectonic plates
the crust
Why were the fossils Wegener used to support his theory of continental drift such good evidence?
They could not swim across the ocean, the plants could not blow across the ocean
Himalayan Mountains
True or false
TRUE!
Describe how evaporation is driven by the energy of the sun.
the sun heats up the water changing it from a liquid to a gas.
Which layer do convection currents occur in
Explain how the environment in this area has changed by comparing the oldest layers to the youngest layers.
changed from water to land
What is the process that moves tectonic plates. Describe this process.
heat from the inner core heats the magma in the mantle causing it to rise. when it reaches the top is cools and sinks back down. this continues in a cycle we call convection currents.
What is one piece of evidence that proves the continents were once connected
the same fossils found on continents that are separated by oceans
(they fit together like puzzle pieces)
Describe the two reasons we have seasons.
1. tilt of earth's axis
2. earth's revolution around the sun
Which is thicker- continental crust or oceanic crust
continental crust