Terrestrial Mercury, Earth & Moon

Why is the sky of the Moon and Mercury black?

• temperature differences
• small sizes
• no atmosphere

Which other body in the solar system does the Moon closely resemble?

• Mars
• Venus
• Earth
• Mercury

Which moon feature are the circular pits created by rocky fragments that struck the surface?

• rilles
• regolith
• craters 
• maria

How is the planet Mercury similar to Earth's moon?

• their surfaces both appear heavily cratered by impacts.
• their lowland regions were flooded by ancient lava flows.
• rotational periods are almost equal to their orbital periods
• all of the above.

What do we call the study of planets through contrast and comparison?

• geology.
• planetary science.
• comparative planetology.
• contrastive planetology.

Earth's interior can be divided into four zones. Which zone has the lowest density?

• crust
• mantle
• inner core
• outer core

How does temperature and pressure vary with depth inside Earth?

• temp and pressure both increase with depth
• temp and pressure both decrease with depth
• temp increases with depth and pressure decreases with depth
• temp decreases with depth and pressure increases with depth

What creates Earth's strong dipole magentic field?

• conduction of solar wind particles through solid Earth
• convection in Earth's outer liquid iron-nickel core along with Earth's rotation
• conduction of solar wind particles in Earth's ionosphere

What drives the moving plates of Earth's crust?

• convection in Earth's inner iron core
• convection in Earth's mantle
• The Moon's tidal force
• None of these

What is the likely source of Earth's early atmosphere that consisted of carbon dioxide and water vapor?

• it was outgassed from Earth's interior during volcanic activity.
• It arrived in the form of icy planetesimals that impacted Earth.
• These two gases are the products of radioactive decay of long-lived radioactive elements in Earth's crust.
• Both outgassed and arrived in the form of icy planetesimals