UNIT 7: NATURAL DISASTERS
II. UNIT 7: Natural Disasters
Time: Entire quarter
a. Unit Introduction:
how seismic waves carry energy from an earthquake away from the focus,
through Earth’s interior and across the surface and the damage they cause.
how volcanoes form when magma erupts through the crust and reaches the
c. Essential Questions:
does the energy of an earthquake travel through Earth?
can earthquake safety be increased and earthquake damage reduced?
does the change in pressure and expansion of gases inside affect the magma
inside a volcano?
does the silica content of magma affect the type of landform that is
- How do
volcanic belts form along plate boundaries?
d. Essential Concepts
from an earthquake travels in waves.
The waves can produce severe movement in the Earth’s crust and
use level of damage, size of waves and amount of energy released to rate
the magnitude of an earthquake.
use seismic waves to locate an earthquake’s epicenter.
collected from seismographs and fault-monitoring devices is used to
monitor active faults and predict earthquakes.
- When a
volcano erupts, the force created by the expanding gases drives the magma
to either flow out or explode out of the volcano.
classify eruptions according to the amount of silica found in the
magma. Different types of
landforms are created by different types of eruptions.
crust often fractures along plate boundaries allowing magma to reach the
e. Essential Skills
- p wave
- s wave