[2026] PTE Academic Reading - Fill in the Blanks (Dropdown)
Fill in the Blanks (Dropdown) #0051
Fill in the Blanks (Dropdown)
Fill in the Blanks (Dropdown)
Below is a text with blanks. Click on each blank, a list of choices will appear. Select the appropriate answer choice for each blank.
Analyzing the atmospheres of exoplanets is a critical step in the search for extraterrestrial . Astronomers achieve this by observing the starlight that passes through a planet's atmosphere during a . Different gases absorb specific wavelengths of light, creating a unique chemical in the spectrum. The presence of biosignature gases, such as oxygen and methane together, could strongly biological activity. However, distinguishing between biological and geological sources of these gases remains a formidable .
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Highlights
ID:pt1222618948
Test No:#0051
Difficulty:Hard
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