The planets Mercury, Venus, Earth, and Mars, are called terrestrial because they have a compact, rocky surface like Earth's terra firma. The terrestrial planets are the four innermost planets in the solar system. ... Without life, most of the oxygen would soon become part of the compounds on the planet's surface.
Answer:
Human Activities and Loss of Habitat.
Explanation:
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The chemistry shorthand for water is H₂O .
Right there, it's telling you that a molecule of water is the combination of two Hydrogen atoms bound to one Oxygen atom.
Pumping blood in and out of the heart.
Biodiesel (D) is made from vegetable oils and animal fats.
