Unit 6

How does Earth's atmosphere contribute to supporting life on the planet?

• By regulating temperature and protecting against harmful radiation

• By providing a medium for cellular respiration

• By facilitating nutrient absorption in plants and animals

Why is the "Goldilocks Zone" significant in considering a planet's potential to support life?

• It ensures that a planet is not too hot or too cold for liquid water to exist

• It determines the level of oxygen in the planet's atmosphere

• It indicates the presence of gold deposits, which are essential for life

What role does water play in facilitating biochemical reactions essential for life?

• It provides nutrients directly to cells

• It acts as a solvent dissolving and transporting essential molecules

• It serves as a source of energy for metabolic processes

Why is oxygen considered one of the most important elements for supporting life on Earth?

• It is crucial for cellular respiration and energy production
  

• It helps regulate temperature and protect against harmful radiation

• It provides nutrients directly to cells

What is the primary objective of the Search for Extraterrestrial Intelligence (SETI) organization?

• To explore the possibility of human colonization on other planets

• To study the atmosphere of other planets

• To detect signals or evidence of intelligent extraterrestrial life

What is the Kuiper Belt, and where is it located in our solar system?

• Isaac Newton

• Johannes Kepler

• Galileo Galilei

What caused Pluto's reclassification from a planet to a dwarf planet in 2006?

• Its discovery of a new moon

• A redefinition of what constitutes a planet

• Its change in size

What defines a dwarf planet?

• Orbiting the Sun and having enough mass to form into a sphere

• Orbiting a star and having no moons

• Being located within an asteroid belt

Where is the Kuiper Belt located?

• Between Mars and Jupiter

• Beyond Neptune's orbit

• Surrounding the Earth's atmosphere

What distinguishes a meteorite from a meteoroid?

• Meteoroids avoid hitting anything, while meteorites might be found on Earth's surface.

• Meteorites glow as streaks of light in the sky, while meteoroids are small rocky particles.

• Meteoroids are responsible for the extinction of dinosaurs, while meteorites are found in the Oort Cloud