Question

true or false: big gas planets (jovian planets) are more likely to have life than rocky planets (terrestrial planets)
true or false: the greenhouse effect helps keep earth warm enough for life to survive.
true or false: earths magnetic field helps keep its air from being blown away into space.
true or false: all of earths water would instantly turn into vapor if the planet were as hot as venus.

Explanation:

• For the first statement: Big gas planets lack solid surfaces and have extreme conditions (high pressure, no stable land for complex life - forming processes like those on rocky planets), so they are less likely to have life.
• For the second statement: The greenhouse effect (trapping of heat by gases like carbon dioxide in the atmosphere) is essential for keeping Earth's temperature within a range suitable for life.
• For the third statement: Earth's magnetic field (generated by its core) acts as a shield, protecting the atmosphere from being stripped away by the solar wind.
• For the fourth statement: If Earth were as hot as Venus (surface temperature around 462°C), the high temperature would cause water to vaporize quickly.

Answer:

• #17: False
• #18: True
• #19: True
• #20: True