WorksheetsGrade 7 Earthquake Risks
Total questions: 15
Worksheet time: 9mins
The surface along which the crust moves is called a fracture
True
False
(a) is responsible for most of the damage buildings suffer during earthquakes.
The forces that move tectonic plates also move rocks along the fault. _______________
True
False
The larger the force applied to a fault, the smaller the chance of a large earthquake
True
False
When the force on rocks is great enough, they break, producing vibrations called ____.
faults
earthquakes
strains
stresses
What does the richter scale measure?
the energy, or magnitude, of the largest seismic waves produced by an earthquake.
the total energy released by the earthquake, taking into account the size of the fault, the motion along the fault, and the strength of the rocks that break during the earthquake
the intensity of an earthquake based on descriptions of the effects of the earthquake on people and structures.
The strength of an earthquake is known as the
aftershock
magnitude
epicenter
seismograph
The point on the Earth's surface right above the focus of an earthquake is known as the
magnitude
aftershock
epicenter
fault
The __________ scale rates the total energy released by an earthquake.
Mercalli
Richter
Moment Magnitude
All of the above
This scale rates the size of the seismic waves.
Seismograph
Richter
Mercalli
Moment MAgnitude
Seismic waves are recorded and measure by a _________________
anemometer
seismograph
moment mometer
magma mometer
move through Earth
seismographs.
