Earthquakes review Unit 2 Set 2

Front

What are controlled variables in an experiment?

Back

Controlled variables are the variables that are kept constant to ensure a fair test.

Front

What is an aftershock?

Back

An aftershock is an earthquake that occurs later along the same fault zone as a major earthquake, but before the area has returned to its normal level of seismic activity.

Front

What is a fault in geology?

Back

A fault is a fracture in bedrock, along which blocks of rock on opposite sides of the fracture move.

Front

Why are flexible structures better in an earthquake?

Back

Flexible structures are better in an earthquake because they move without breaking.

Front

What is the purpose of a shake table in engineering?

Back

Engineers use a shake table to simulate earthquake movements and test the stability of structures.

Front

What is seismic activity?

Back

Seismic activity refers to the frequency, type, and size of earthquakes that occur in a certain area.

Front

What is the difference between magnitude and intensity of an earthquake?

Back

Magnitude measures the energy released at the source of the earthquake, while intensity measures the effects of the earthquake at different locations.

Front

What is a seismogram?

Back

A seismogram is a record produced by a seismograph that shows the motion of the ground during an earthquake.

Front

What is the Richter scale?

Back

The Richter scale is a logarithmic scale used to measure the magnitude of earthquakes.

Front

What is a tectonic plate?

Back

A tectonic plate is a massive slab of solid rock that makes up the Earth's lithosphere and moves over the semi-fluid asthenosphere.