Question

scientists can use infrared waves to monitor volcanoes! they use a device called a spectrometer. heres how it works.infrared waves emitted from lava are absorbed by volcanic gases.each type of gas absorbs unique wavelengths of infrared waves. a spectrometer positioned above the volcano measures these wavelengths. then, these measurements are used to identify the types of gases emitted by a volcano. monitoring volcanic gases helps scientists predict the likelihood of a volcanic eruption.complete the sentences:volcanic gases infrared waves that are from lava. a spectrometer measures the of these infrared waves to determine the types of gases emitted by the volcano.

Explanation:

The text states that volcanic gases absorb infrared waves from lava, and a spectrometer measures the unique wavelengths of these waves to identify the gas types.

Answer:

Volcanic gases absorb infrared waves that are emitted from lava. A spectrometer measures the wavelengths of these infrared waves to determine the types of gases emitted by the volcano.