Question

1. what is a seismograph?

a device used to predict the weather by measuring atmospheric pressure
an instrument used by scientists to measure the motions of the earths surface
a tool used to measure the speed of ocean currents
a machine that records volcanic eruptions using temperature sensors

1. most earthquakes are caused by ____________ movements

volcanic
tectonic plate
atmospheric
ocean current

Explanation:

• A seismograph is an instrument that records ground motions, such as caused by earthquakes.
• Most earthquakes are the result of energy release due to the movement of tectonic plates.

Answer:

1. An instrument used by scientists to measure the motions of the earth’s surface
2. tectonic plate