Why are Inner Planets Rocky and Outer Planets Gaseous?

Which part of the Earth has the least mass?

• crust

• mantle

• core

What strong evidence indicates that the core is metallic?

• magnetic field

• tectonic plates

What is responsible for the magnetic field?

• convection currents in the outer core

• convection currents in the inner core

How does the Eath's core produce the heat?

• Through the breakdown of radioactive elements in the inner core.

• Through the breakdown of radioactive elements in the outer core.

• Through nuclear fusion

Mercury is the densest planet in our solar system.

• True

• False

The crust of Mercy is 85 percent of the planet's radius.

• True

• False

What is different between Earth and Venus?

• It is observed that Earth has an active tectonic plate but Venus doesn't.

• Venus doesn't have a core.

• There are active tectonic plates on Venus and inactive tectonic plates on Earth.

What is another word or phrase for jovian planets?

• Gas giants

• Terrestrial planets.

• Rocky planets

What is about the surface of the gas giants?

• The is no clear boundary between where the surface starts or where the atmosphere ends.

• The is no clear distinction between where the surface and the core.

• They don't have a core.

Gas giants don't have a rocky core.

• True

• False