1) Which of the following is a reason why life can only exist on Earth? a) Earth has a unique atmosphere b) Earth is the only planet with water c) Earth is the only planet with living organisms 2) What is necessary for life on other named planets? a) Liquid water b) Oxygen c) Plants 3) Which of the following is NOT a necessary condition for life on other planets? a) Suitable temperature range b) Presence of organic molecules c) Presence of humans 4) Which of the following is a plausible reason why life may exist on other planets? a) Similar atmospheric composition b) Similar geological features c) Similar distance from the sun 5) Which of the following is a competitive alternate response for why life can only exist on Earth? a) Lack of suitable temperature range b) Lack of suitable atmospheric composition c) Lack of suitable geological features 6) Which of the following is a necessary condition for life on other planets? a) Presence of advanced technology b) Presence of complex organisms c) Presence of liquid methane 7) Which of the following is a plausible reason why life may not exist on other planets? a) Lack of water b) Lack of sunlight c) Lack of oxygen 8) Which of the following is a competitive alternate response for what is necessary for life on other planets? a) Presence of volcanic activity b) Presence of extreme temperatures c) Presence of toxic gases 9) Which of the following is a necessary condition for life on other planets? a) Presence of intelligent beings b) Presence of complex ecosystems c) Presence of stable atmosphere 10) Which of the following is a plausible reason why life may exist on other planets? a) Similar magnetic field b) Similar atmospheric pressure c) Similar surface temperature

Exploring Life Beyond Earth: Conditions for Existence

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