Question

sts can use infrared waves to monitor volcanoes! they use a device called a meter. 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.
spectrometer above the overlook vent in halemaumau crater in hawaii
omplete the sentences.
infrared waves are dropdown by lava and then are dropdown by volcanic gases. a spectrometer measures the dropdown of these infrared waves to determine the types of gases emitted by the volcano.

Explanation:

According to the text, "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." So, the first blank should be "emitted" (as lava emits the infrared waves), the second blank "absorbed" (by volcanic gases), and the third blank "wavelengths" (which the spectrometer measures).

Answer:

emitted; absorbed; wavelengths