What is Life?
How Did Life on Earth Begin?
How Abundant is Life in the Universe?
How Does Life Solve Problems of Seemingly Impossible Complexity?
Answers
Answer:
Life is a characteristic that distinguishes physical entities that have biological processes, such as signaling and self-sustaining processes, from those that do not, either because such functions have ceased (they have died), or because they never had such functions and are classified as inanimate.
ATLANTA—A cataclysm may have jump-started life on Earth. A new scenario suggests that some 4.47 billion years ago—a mere 60 million years after Earth took shape and 40 million years after the moon formed—a moon-size object sideswiped Earth and exploded into an orbiting cloud of molten iron and other debris.
Answer:
1. Life is a quality that people, animals or plants have when they are not dead.
2. ATLANTA—A cataclysm may have jump-started life on Earth. A new scenario suggests that some 4.47 billion years ago—a mere 60 million years after Earth took shape and 40 million years after the moon formed—a moon-size object sideswiped Earth and exploded into an orbiting cloud of molten iron and other debris.
3. The only life we know of in the universe has developed on a planet, the Earth. Thus, other planets have always been the major focus of our search for other forms of life. If planets have life in the universe, then life is abundantin the universe.
4. Complex problem solving activities are necessary in dynamic environments to achieve ill-defined goals that cannot be reached by routine actions. Complex problems usually involve knowledge-rich requirements and collaboration among different persons.