Chapter 1 Test

What is the primary reason that piloted spacecraft have not ventured far into outer space?

• Lack of interest from astronauts
• Outer space being too vast to explore
• Dangerous conditions for living things
• Insufficient technology for long space journeys

What was the primary challenge faced by the dirigible from the story "Red Mars" in flying over Mars?

• Strong winds
• Limited fuel supply
• Thin atmosphere
• Harsh sunlight

How does Mars' atmosphere compare to Earth's atmosphere?

• Mars has a denser atmosphere with more oxygen.
• Mars has a thicker atmosphere with a similar composition.
• Mars has a thinner atmosphere with very little oxygen.
• Mars has an identical atmosphere to that of Earth.

Which of the following accurately describes the conditions on Mars?

• The Martian atmosphere is rich in breathable oxygen.
• Mars has abundant liquid water on its surface.
• The surface of Mars is covered in lush vegetation.
• Mars has a thin atmosphere and limited liquid water.

What is the main reason why hydrogen is not flammable in the Martian atmosphere?

• Martian hydrogen is a different element.
• Martian atmosphere lacks oxygen for combustion.
• Hydrogen becomes inert when exposed to Martian conditions.
• The low pressure on Mars prevents hydrogen combustion.

What is the primary reason Earth's atmosphere contains oxygen but Mars' does not?

• Mars lacks atoms of oxygen.
• Mars' atmosphere is too dense for oxygen to accumulate.
• Oxygen-producing organisms have not evolved on Mars.
• Martian organisms consume oxygen at a high rate.

What is the main reason why Mars is considered a more promising possibility for colonization compared to Venus?

• Venus has a thicker atmosphere than Mars.
• Mars has a milder climate and lower temperatures.
• Mars has a more hospitable magnetic field.
• Venus lacks essential resources for human survival.

What is the significance of the statement, "The survival of the human race depends on its ability to find new homes elsewhere in the universe"?

• It emphasizes the importance of space exploration for scientific discovery.
• It highlights the need for more advanced space travel technology.
• It suggests that Earth could become uninhabitable in the future.
• It encourages people to focus on improving conditions on Earth.

What role do cyanobacteria play in the history of Earth's atmosphere?

• They are responsible for introducing oxygen into Earth's atmosphere.
• They produce carbon dioxide, an essential component of the atmosphere.
• They regulate the temperature of the planet through photosynthesis.
• They are the main source of nitrogen in Earth's atmosphere.

What do astronauts have to bring with them into space in order to survive?

• food
• water
• air
• shelter
• all of the above