Prepare a paragraph on natural creation and destruction? State the conditions essential for maintenance of life on our planet. Give a description of how many species of plants and animals have become extinct
Answers
Answer:
Basic requirements/conditions for life
Source of Energy
Complex Chemistry (liquid water and carbon)
Benign Environments (esp. low UV)
Criteria for Habitable Planets
Distance from its parent star (Habitable Zone)
Size of the Planet
Searches for Earths and Life
Spectroscopic biomarkers
Basic Requirements for Life
The first question we must address is what conditions are necessary for life to exist in the first place.
Based on what we know about life on Earth, the only place we know life exists for sure, we can determine at least 3 major requirements:
EnergyWarmth to allow liquid water to exist (or liquid methane?)Energy is needed to fuel chemical reactions (metabolism)
Complex ChemistryElements heavier than Hydrogen & HeliumCarbon as building blocks for complex organic molecules
Protection from harmful UV radiationUV light can damage or break complex molecules, causing mutations that may inhibit the emergence of complex life.Protection from UV is afforded by the Ozone Layer, underwater, or underground.
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