Answer:
concrete
Explanation:
Researchers think regolith on Mars could serve as a replacement for concrete components. The Mars rovers have used gas chromatography, mass spectrometry, and laser spectrometry to determine the composition of martian soil. Mars regolith is mostly silicon dioxide and ferric oxide, with a fair amount of aluminum oxide, calcium oxide, and sulfur oxide. The composition varies from place to place on the planet’s surface because of variability in asteroid collisions and the weathering by wind and water, in ancient oceans and in some modern water flows. But no spacecraft has returned to Earth with actual samples of the material.
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Why would you need someone to do an narrative for you
Can you please provide background information to your story? There can be no information created with the paragraph listed. Please let me know when you’ve done that and I’ll be happy to help!
Answer:
Pope Gregory IX was important because he named many new cardinals, established the medieval Inquisition, promulgated a code of canon law, and twice excommunicated Roman Emperor Frederick II.
